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| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Kairui Song
|
b25786b4a9 |
mm, swap: only scan one cluster in fragment list
Patch series "mm, swap: improve cluster scan strategy", v2. This series improves the large allocation performance and reduces the failure rate. Some design of the cluster alloactor was later found to be improvable after thorough testing. The allocator spent too much effort scanning the fragment list, which is not helpful in most setups, but causes serious contention of the list lock (si->lock). Besides, the allocator prefers free clusters when searching for a new cluster due to historical reasons, which causes fragmentation issues. So make the allocator only scan one cluster for high order allocation, and prefer nonfull cluster. This both improves the performance and reduces fragmentation. For example, build kernel test with make -j96 and 10G ZRAM with 64kB mTHP enabled shows better performance and a lower failure rate: Before: sys time: 11609.69s 64kB/swpout: 1787051 64kB/swpout_fallback: 20917 After: sys time: 5587.53s 64kB/swpout: 1811598 64kB/swpout_fallback: 0 System time is cut in half, and the failure rate drops to zero. Larger allocations in a hybrid workload also showed a major improvement: 512kB swap failure rate: Before: swpout:11663 swpout_fallback:1767 After: swpout:14480 swpout_fallback:6 2M swap failure rate: Before: swpout:24 swpout_fallback:1442 After: swpout:1329 swpout_fallback:7 This patch (of 3): Fragment clusters were mostly failing high order allocation already. The reason we scan it through now is that a swap slot may get freed without releasing the swap cache, so a swap map entry will end up in HAS_CACHE only status, and the cluster won't be moved back to non-full or free cluster list. This may cause a higher allocation failure rate. Usually only !SWP_SYNCHRONOUS_IO devices may have a large number of slots stuck in HAS_CACHE only status. Because when a !SWP_SYNCHRONOUS_IO device's usage is low (!vm_swap_full()), it will try to lazy free the swap cache. But this fragment list scan out is a bit overkill. Fragmentation is only an issue for the allocator when the device is getting full, and by that time, swap will be releasing the swap cache aggressively already. Only scanning one fragment cluster at a time is good enough to reclaim already pinned slots, and move the cluster back to nonfull. And besides, only high order allocation requires iterating over the list, order 0 allocation will succeed on the first attempt. And high order allocation failure isn't a serious problem. So the iteration of fragment clusters is trivial, but it will slow down large allocation by a lot when the fragment cluster list is long. So it's better to drop this fragment cluster iteration design. Test on a 48c96t system, build linux kernel using 10G ZRAM, make -j48, defconfig with 768M cgroup memory limit, on top of tmpfs, 4K folio only: Before: sys time: 4432.56s After: sys time: 4430.18s Change to make -j96, 2G memory limit, 64kB mTHP enabled, and 10G ZRAM: Before: sys time: 11609.69s 64kB/swpout: 1787051 64kB/swpout_fallback: 20917 After: sys time: 5572.85s 64kB/swpout: 1797612 64kB/swpout_fallback: 19254 Change to 8G ZRAM: Before: sys time: 21524.35s 64kB/swpout: 1687142 64kB/swpout_fallback: 128496 After: sys time: 6278.45s 64kB/swpout: 1679127 64kB/swpout_fallback: 130942 Change to use 10G brd device with SWP_SYNCHRONOUS_IO flag removed: Before: sys time: 7393.50s 64kB/swpout:1788246 swpout_fallback: 0 After: sys time: 7399.88s 64kB/swpout:1784257 swpout_fallback: 0 Change to use 8G brd device with SWP_SYNCHRONOUS_IO flag removed: Before: sys time: 26292.26s 64kB/swpout:1645236 swpout_fallback: 138945 After: sys time: 9463.16s 64kB/swpout:1581376 swpout_fallback: 259979 The performance is a lot better for large folios, and the large order allocation failure rate is only very slightly higher or unchanged even for !SWP_SYNCHRONOUS_IO devices high pressure. Link: https://lkml.kernel.org/r/20250806161748.76651-1-ryncsn@gmail.com Link: https://lkml.kernel.org/r/20250806161748.76651-2-ryncsn@gmail.com Signed-off-by: Kairui Song <kasong@tencent.com> Acked-by: Nhat Pham <nphamcs@gmail.com> Acked-by: Chris Li <chrisl@kernel.org> Cc: Baoquan He <bhe@redhat.com> Cc: Barry Song <baohua@kernel.org> Cc: "Huang, Ying" <ying.huang@linux.alibaba.com> Cc: Kairui Song <kasong@tencent.com> Cc: Kemeng Shi <shikemeng@huaweicloud.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
Suren Baghdasaryan
|
0b16f8bed1 |
mm: change vma_start_read() to drop RCU lock on failure
vma_start_read() can drop and reacquire RCU lock in certain failure cases. It's not apparent that the RCU session started by the caller of this function might be interrupted when vma_start_read() fails to lock the vma. This might become a source of subtle bugs and to prevent that we change the locking rules for vma_start_read() to drop RCU read lock upon failure. This way it's more obvious that RCU-protected objects are unsafe after vma locking fails. Link: https://lkml.kernel.org/r/20250804233349.1278678-2-surenb@google.com Suggested-by: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Suren Baghdasaryan <surenb@google.com> Tested-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Jann Horn <jannh@google.com> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Suren Baghdasaryan <surenb@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
|
Suren Baghdasaryan
|
cc483b3288 |
mm: limit the scope of vma_start_read()
Limit the scope of vma_start_read() as it is used only as a helper for higher-level locking functions implemented inside mmap_lock.c and we are about to introduce more complex RCU rules for this function. The change is pure code refactoring and has no functional changes. Link: https://lkml.kernel.org/r/20250804233349.1278678-1-surenb@google.com Suggested-by: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Suren Baghdasaryan <surenb@google.com> Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Cc: Jann Horn <jannh@google.com> Cc: Liam Howlett <liam.howlett@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
Sudarsan Mahendran
|
35edbaa04a |
selftests/mm: pass filename as input param to VM_PFNMAP tests
Enable these tests to be run on other pfnmap'ed memory like NVIDIA's EGM. Add '--' as a separator to pass in file path. This allows passing of cmd line arguments to kselftest_harness. Use '/dev/mem' as default filename. Existing test passes: pfnmap TAP version 13 1..6 # Starting 6 tests from 1 test cases. # PASSED: 6 / 6 tests passed. # Totals: pass:6 fail:0 xfail:0 xpass:0 skip:0 error:0 Pass params to kselftest_harness: pfnmap -r pfnmap:mremap_fixed TAP version 13 1..1 # Starting 1 tests from 1 test cases. # RUN pfnmap.mremap_fixed ... # OK pfnmap.mremap_fixed ok 1 pfnmap.mremap_fixed # PASSED: 1 / 1 tests passed. # Totals: pass:1 fail:0 xfail:0 xpass:0 skip:0 error:0 Pass non-existent file name as input: pfnmap -- /dev/blah TAP version 13 1..6 # Starting 6 tests from 1 test cases. # RUN pfnmap.madvise_disallowed ... # SKIP Cannot open '/dev/blah' Pass non pfnmap'ed file as input: pfnmap -r pfnmap.madvise_disallowed -- randfile.txt TAP version 13 1..1 # Starting 1 tests from 1 test cases. # RUN pfnmap.madvise_disallowed ... # SKIP Invalid file: 'randfile.txt'. Not pfnmap'ed Link: https://lkml.kernel.org/r/20250805013629.47629-1-sudarsanm@google.com Signed-off-by: Sudarsan Mahendran <sudarsanm@google.com> Acked-by: David Hildenbrand <david@redhat.com> Cc: Axel Rasmussen <axelrasmussen@google.com> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
Sergey Senozhatsky
|
7cbce1eaeb |
zram: protect recomp_algorithm_show() with ->init_lock
sysfs handlers should be called under ->init_lock and are not supposed to unlock it until return, otherwise e.g. a concurrent reset() can occur. There is one handler that breaks that rule: recomp_algorithm_show(). Move ->init_lock handling outside of __comp_algorithm_show() (also drop it and call zcomp_available_show() directly) so that the entire recomp_algorithm_show() loop is protected by the lock, as opposed to protecting individual iterations. The patch does not need to go to -stable, as it does not fix any runtime errors (at least I can't think of any). It makes recomp_algorithm_show() "atomic" w.r.t. zram reset() (just like the rest of zram sysfs show() handlers), that's a pretty minor change. Link: https://lkml.kernel.org/r/20250805101946.1774112-1-senozhatsky@chromium.org Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org> Reported-by: Seyediman Seyedarab <imandevel@gmail.com> Suggested-by: Seyediman Seyedarab <imandevel@gmail.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Minchan Kim <minchan@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
Ye Liu
|
79e1c24285 |
mm: replace (20 - PAGE_SHIFT) with common macros for pages<->MB conversion
Replace repeated (20 - PAGE_SHIFT) calculations with standard macros: - MB_TO_PAGES(mb) converts MB to page count - PAGES_TO_MB(pages) converts pages to MB No functional change. [akpm@linux-foundation.org: remove arc's private PAGES_TO_MB, remove its unused PAGES_TO_KB] [akpm@linux-foundation.org: don't include mm.h due to include file ordering mess] Link: https://lkml.kernel.org/r/20250718024134.1304745-1-ye.liu@linux.dev Signed-off-by: Ye Liu <liuye@kylinos.cn> Acked-by: Zi Yan <ziy@nvidia.com> Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Reviewed-by: Dev Jain <dev.jain@arm.com> Acked-by: David Hildenbrand <david@redhat.com> Acked-by: Chris Li <chrisl@kernel.org> Cc: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: Baoquan He <bhe@redhat.com> Cc: Barry Song <baohua@kernel.org> Cc: Ben Segall <bsegall@google.com> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Dietmar Eggemann <dietmar.eggemann@arm.com> Cc: Frederic Weisbecker <frederic@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Josh Triplett <josh@joshtriplett.org> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Kairui Song <kasong@tencent.com> Cc: Kemeng Shi <shikemeng@huaweicloud.com> Cc: Lai jiangshan <jiangshanlai@gmail.com> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Mariano Pache <npache@redhat.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Mel Gorman <mgorman <mgorman@suse.de> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Neeraj Upadhyay <neeraj.upadhyay@kernel.org> Cc: Nhat Pham <nphamcs@gmail.com> Cc: "Paul E . McKenney" <paulmck@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ryan Roberts <ryan.roberts@arm.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: "Uladzislau Rezki (Sony)" <urezki@gmail.com> Cc: Valentin Schneider <vschneid@redhat.com> Cc: Vincent Guittot <vincent.guittot@linaro.org> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
Zhang Qilong
|
849d5cff4d |
/dev/zero: try to align PMD_SIZE for private mapping
Attempt to map aligned to huge page size for private mapping which could achieve performance gains, the mprot_tw4m in libMicro average execution time on arm64: - Test case: mprot_tw4m - Before the patch: 22 us - After the patch: 17 us If THP config is not set, we fall back to system page size mappings. Link: https://lkml.kernel.org/r/20250731122305.2669090-1-zhangqilong3@huawei.com Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com> Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Tested-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Acked-by: David Hildenbrand <david@redhat.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Nanyong Sun <sunnanyong@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
Ruan Shiyang
|
337135e612 |
mm: memory-tiering: fix PGPROMOTE_CANDIDATE counting
Goto-san reported confusing pgpromote statistics where the
pgpromote_success count significantly exceeded pgpromote_candidate.
On a system with three nodes (nodes 0-1: DRAM 4GB, node 2: NVDIMM 4GB):
# Enable demotion only
echo 1 > /sys/kernel/mm/numa/demotion_enabled
numactl -m 0-1 memhog -r200 3500M >/dev/null &
pid=$!
sleep 2
numactl memhog -r100 2500M >/dev/null &
sleep 10
kill -9 $pid # terminate the 1st memhog
# Enable promotion
echo 2 > /proc/sys/kernel/numa_balancing
After a few seconds, we observeed `pgpromote_candidate < pgpromote_success`
$ grep -e pgpromote /proc/vmstat
pgpromote_success 2579
pgpromote_candidate 0
In this scenario, after terminating the first memhog, the conditions for
pgdat_free_space_enough() are quickly met, and triggers promotion.
However, these migrated pages are only counted for in PGPROMOTE_SUCCESS,
not in PGPROMOTE_CANDIDATE.
To solve these confusing statistics, introduce PGPROMOTE_CANDIDATE_NRL to
count the missed promotion pages. And also, not counting these pages into
PGPROMOTE_CANDIDATE is to avoid changing the existing algorithm or
performance of the promotion rate limit.
Link: https://lkml.kernel.org/r/20250901090122.124262-1-ruansy.fnst@fujitsu.com
Link: https://lkml.kernel.org/r/20250729035101.1601407-1-ruansy.fnst@fujitsu.com
Fixes:
|
||
Hao Jia
|
915a4022b5 |
mm/mglru: update MG-LRU proactive reclaim statistics only to memcg
Users can use /sys/kernel/debug/lru_gen to trigger proactive memory reclaim of a specified memcg. Currently, statistics such as pgrefill, pgscan and pgsteal will be updated to the /proc/vmstat system memory statistics. This will confuse some system memory pressure monitoring tools, making it difficult to determine whether pgscan and pgsteal are caused by system-level pressure or by proactive memory reclaim of some specific memory cgroup. Therefore, make this interface behave similarly to memory.reclaim. Update proactive memory reclaim statistics only to its memory cgroup. Link: https://lkml.kernel.org/r/20250717082845.34673-1-jiahao.kernel@gmail.com Signed-off-by: Hao Jia <jiahao1@lixiang.com> Cc: Axel Rasmussen <axelrasmussen@google.com> Cc: David Hildenbrand <david@redhat.com> Cc: Greg Thelen <gthelen@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Kinsey Ho <kinseyho@google.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Qi Zheng <zhengqi.arch@bytedance.com> Cc: Shakeel Butt <shakeel.butt@linux.dev> Cc: Yuanchu Xie <yuanchu@google.com> Cc: Yu Zhao <yuzhao@google.com> Cc: Roman Gushchin <roman.gushchin@linux.dev> Cc: Muchun Song <songmuchun@bytedance.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
Jann Horn
|
e5eb324688 |
kasan: add test for SLAB_TYPESAFE_BY_RCU quarantine skipping
Verify that KASAN does not quarantine objects in SLAB_TYPESAFE_BY_RCU slabs if CONFIG_SLUB_RCU_DEBUG is off. [jannh@google.com: v2] Link: https://lkml.kernel.org/r/20250729-kasan-tsbrcu-noquarantine-test-v2-1-d16bd99309c9@google.com [jannh@google.com: make comment more verbose] Link: https://lkml.kernel.org/r/20250814-kasan-tsbrcu-noquarantine-test-v3-1-9e9110009b4e@google.com Link: https://lkml.kernel.org/r/20250728-kasan-tsbrcu-noquarantine-test-v1-1-fa24d9ab7f41@google.com Signed-off-by: Jann Horn <jannh@google.com> Suggested-by: Andrey Konovalov <andreyknvl@gmail.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Dmitriy Vyukov <dvyukov@google.com> Cc: Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
Joshua Hahn
|
56b060d0a1 |
mempolicy: clarify what zone reclaim means
The zone_reclaim_mode API controls the reclaim behavior when a node runs out of memory. Contrary to its user-facing name, it is internally referred to as "node_reclaim_mode". This can be confusing. But because we cannot change the name of the API since it has been in place since at least 2.6, let's try to be more explicit about what the behavior of this API is. Change the description to clarify what zone reclaim entails, and be explicit about the RECLAIM_ZONE bit, whose purpose has led to some confusion in the past already [1] [2]. While at it, also soften the warning about changing these bits. [joshua.hahnjy@gmail.com: remove the reference to the vm.zone_reclaim_mode sysctl as an ABI] Link: https://lkml.kernel.org/r/20250806134404.2000234-1-joshua.hahnjy@gmail.com Link: https://lkml.kernel.org/r/20250805205048.1518453-1-joshua.hahnjy@gmail.com Link: https://lore.kernel.org/linux-mm/1579005573-58923-1-git-send-email-alex.shi@linux.alibaba.com/ [1] Link: https://lore.kernel.org/linux-mm/20200626003459.D8E015CA@viggo.jf.intel.com/ [2] Signed-off-by: Joshua Hahn <joshua.hahnjy@gmail.com> Acked-by: SeongJae Park <sj@kernel.org> Acked-by: David Hildenbrand <david@redhat.com> Reviewed-by: Huang Ying <ying.huang@linux.alibaba.com> Acked-by: Zi Yan <ziy@nvidia.com> Acked-by: Byungchul Park <byungchul@sk.com> Cc: Alistair Popple <apopple@nvidia.com> Cc: Byungchul Park <byungchul@sk.com> Cc: Gregory Price <gourry@gourry.net> Cc: Mathew Brost <matthew.brost@intel.com> Cc: Rakie Kim <rakie.kim@sk.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
Stephen Boyd
|
91ec7ad756 |
clk: convert drivers from deprecated round_rate() to determine_rate() for v6.18
The round_rate() clk ops is deprecated in the clk framework in favor
of the determine_rate() clk ops, so let's go ahead and convert the
various clk drivers using the Coccinelle semantic patch posted below.
I did some minor cosmetic cleanups of the code in some cases.
Coccinelle semantic patch:
virtual patch
// Look up the current name of the round_rate function
@ has_round_rate @
identifier round_rate_name =~ ".*_round_rate";
identifier hw_param, rate_param, parent_rate_param;
@@
long round_rate_name(struct clk_hw *hw_param, unsigned long rate_param,
unsigned long *parent_rate_param)
{
...
}
// Rename the route_rate function name to determine_rate()
@ script:python generate_name depends on has_round_rate @
round_rate_name << has_round_rate.round_rate_name;
new_name;
@@
coccinelle.new_name = round_rate_name.replace("_round_rate", "_determine_rate")
// Change rate to req->rate; also change occurrences of 'return XXX'.
@ chg_rate depends on generate_name @
identifier has_round_rate.round_rate_name;
identifier has_round_rate.hw_param;
identifier has_round_rate.rate_param;
identifier has_round_rate.parent_rate_param;
identifier ERR =~ "E.*";
expression E;
@@
long round_rate_name(struct clk_hw *hw_param, unsigned long rate_param,
unsigned long *parent_rate_param)
{
<...
(
-return -ERR;
+return -ERR;
|
- return rate_param;
+ return 0;
|
- return E;
+ req->rate = E;
+
+ return 0;
|
- rate_param
+ req->rate
)
...>
}
// Coccinelle only transforms the first occurrence of the rate parameter
// Run a second time. FIXME: Is there a better way to do this?
@ chg_rate2 depends on generate_name @
identifier has_round_rate.round_rate_name;
identifier has_round_rate.hw_param;
identifier has_round_rate.rate_param;
identifier has_round_rate.parent_rate_param;
@@
long round_rate_name(struct clk_hw *hw_param, unsigned long rate_param,
unsigned long *parent_rate_param)
{
<...
- rate_param
+ req->rate
...>
}
// Change parent_rate to req->best_parent_rate
@ chg_parent_rate depends on generate_name @
identifier has_round_rate.round_rate_name;
identifier has_round_rate.hw_param;
identifier has_round_rate.rate_param;
identifier has_round_rate.parent_rate_param;
@@
long round_rate_name(struct clk_hw *hw_param, unsigned long rate_param,
unsigned long *parent_rate_param)
{
<...
(
- *parent_rate_param
+ req->best_parent_rate
|
- parent_rate_param
+ &req->best_parent_rate
)
...>
}
// Convert the function definition from round_rate() to determine_rate()
@ func_definition depends on chg_rate @
identifier has_round_rate.round_rate_name;
identifier has_round_rate.hw_param;
identifier has_round_rate.rate_param;
identifier has_round_rate.parent_rate_param;
identifier generate_name.new_name;
@@
- long round_rate_name(struct clk_hw *hw_param, unsigned long rate_param,
- unsigned long *parent_rate_param)
+ int new_name(struct clk_hw *hw, struct clk_rate_request *req)
{
...
}
// Update the ops from round_rate() to determine_rate()
@ ops depends on func_definition @
identifier has_round_rate.round_rate_name;
identifier generate_name.new_name;
@@
{
...,
- .round_rate = round_rate_name,
+ .determine_rate = new_name,
...,
}
Note that I used coccinelle 1.2 instead of 1.3 since the newer version
adds unnecessary braces as described in this post.
https://lore.kernel.org/cocci/67642477-5f3e-4b2a-914d-579a54f48cbd@intel.com/
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Merge tag 'clk-round-rate-6.18' of https://github.com/masneyb/linux into clk-determine-rate
Pull clk_ops::round_rate conversion to clk_ops::determine_rate() from Brian Masney:
The round_rate() clk ops is deprecated in the clk framework in favor
of the determine_rate() clk ops, so let's go ahead and convert the
various clk drivers using the Coccinelle semantic patch posted below.
I did some minor cosmetic cleanups of the code in some cases.
Coccinelle semantic patch:
virtual patch
// Look up the current name of the round_rate function
@ has_round_rate @
identifier round_rate_name =~ ".*_round_rate";
identifier hw_param, rate_param, parent_rate_param;
@@
long round_rate_name(struct clk_hw *hw_param, unsigned long rate_param,
unsigned long *parent_rate_param)
{
...
}
// Rename the route_rate function name to determine_rate()
@ script:python generate_name depends on has_round_rate @
round_rate_name << has_round_rate.round_rate_name;
new_name;
@@
coccinelle.new_name = round_rate_name.replace("_round_rate", "_determine_rate")
// Change rate to req->rate; also change occurrences of 'return XXX'.
@ chg_rate depends on generate_name @
identifier has_round_rate.round_rate_name;
identifier has_round_rate.hw_param;
identifier has_round_rate.rate_param;
identifier has_round_rate.parent_rate_param;
identifier ERR =~ "E.*";
expression E;
@@
long round_rate_name(struct clk_hw *hw_param, unsigned long rate_param,
unsigned long *parent_rate_param)
{
<...
(
-return -ERR;
+return -ERR;
|
- return rate_param;
+ return 0;
|
- return E;
+ req->rate = E;
+
+ return 0;
|
- rate_param
+ req->rate
)
...>
}
// Coccinelle only transforms the first occurrence of the rate parameter
// Run a second time. FIXME: Is there a better way to do this?
@ chg_rate2 depends on generate_name @
identifier has_round_rate.round_rate_name;
identifier has_round_rate.hw_param;
identifier has_round_rate.rate_param;
identifier has_round_rate.parent_rate_param;
@@
long round_rate_name(struct clk_hw *hw_param, unsigned long rate_param,
unsigned long *parent_rate_param)
{
<...
- rate_param
+ req->rate
...>
}
// Change parent_rate to req->best_parent_rate
@ chg_parent_rate depends on generate_name @
identifier has_round_rate.round_rate_name;
identifier has_round_rate.hw_param;
identifier has_round_rate.rate_param;
identifier has_round_rate.parent_rate_param;
@@
long round_rate_name(struct clk_hw *hw_param, unsigned long rate_param,
unsigned long *parent_rate_param)
{
<...
(
- *parent_rate_param
+ req->best_parent_rate
|
- parent_rate_param
+ &req->best_parent_rate
)
...>
}
// Convert the function definition from round_rate() to determine_rate()
@ func_definition depends on chg_rate @
identifier has_round_rate.round_rate_name;
identifier has_round_rate.hw_param;
identifier has_round_rate.rate_param;
identifier has_round_rate.parent_rate_param;
identifier generate_name.new_name;
@@
- long round_rate_name(struct clk_hw *hw_param, unsigned long rate_param,
- unsigned long *parent_rate_param)
+ int new_name(struct clk_hw *hw, struct clk_rate_request *req)
{
...
}
// Update the ops from round_rate() to determine_rate()
@ ops depends on func_definition @
identifier has_round_rate.round_rate_name;
identifier generate_name.new_name;
@@
{
...,
- .round_rate = round_rate_name,
+ .determine_rate = new_name,
...,
}
Note that I used coccinelle 1.2 instead of 1.3 since the newer version
adds unnecessary braces as described in this post.
https://lore.kernel.org/cocci/67642477-5f3e-4b2a-914d-579a54f48cbd@intel.com/
* tag 'clk-round-rate-6.18' of https://github.com/masneyb/linux: (118 commits)
clk: scmi: migrate round_rate() to determine_rate()
clk: ti: fapll: convert from round_rate() to determine_rate()
clk: ti: dra7-atl: convert from round_rate() to determine_rate()
clk: ti: divider: convert from round_rate() to determine_rate()
clk: ti: composite: convert from round_rate() to determine_rate()
clk: ti: dpll: convert from round_rate() to determine_rate()
clk: ti: dpll: change error return from ~0 to -EINVAL
clk: ti: dpll: remove round_rate() in favor of determine_rate()
clk: tegra: tegra210-emc: convert from round_rate() to determine_rate()
clk: tegra: super: convert from round_rate() to determine_rate()
clk: tegra: pll: convert from round_rate() to determine_rate()
clk: tegra: periph: divider: convert from round_rate() to determine_rate()
clk: tegra: divider: convert from round_rate() to determine_rate()
clk: tegra: audio-sync: convert from round_rate() to determine_rate()
clk: fixed-factor: drop round_rate() clk ops
clk: divider: remove round_rate() in favor of determine_rate()
clk: visconti: pll: convert from round_rate() to determine_rate()
clk: versatile: vexpress-osc: convert from round_rate() to determine_rate()
clk: versatile: icst: convert from round_rate() to determine_rate()
clk: versaclock7: convert from round_rate() to determine_rate()
...
|
||
|
Stephen Boyd
|
3153d7b8f1 |
Samsung SoC clock drivers changes for 6.18
1. Tesla FSD: Expose CSI clocks to consumers (DTS).
2. Exynos990:
- Few fixes for fixed factor clocks, register widths and proper PLL
parents.
- Add four more clocks for the DPU and HSI0 clock for USB.
- Add PERIC0 and PERIC1 clock controllers (CMU), responsible for
providing clocks to serial engines.
3. Add seven clock controllers for the new Axis ARTPEC-8 SoC. The SoC
shares all main blocks, including the clock controllers, with Samsung
SoC, so same drivers and bindings are used.
4. Cleanups: switch to determine_rate().
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Merge tag 'samsung-clk-6.18' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into clk-samsung
Pull Samsung SoC clk driver updates from Krzysztof Kozlowski:
- Tesla FSD: Expose CSI clocks to consumers (DTS)
- Exynos990:
- Few fixes for fixed factor clocks, register widths and proper PLL
parents
- Add four more clocks for the DPU and HSI0 clock for USB
- Add PERIC0 and PERIC1 clock controllers (CMU), responsible for
providing clocks to serial engines
- Add seven clock controllers for the new Axis ARTPEC-8 SoC. The SoC
shares all main blocks, including the clock controllers, with Samsung
SoC, so same drivers and bindings are used.
- Cleanups: switch to clk_ops::determine_rate()
* tag 'samsung-clk-6.18' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux:
clk: samsung: exynos990: Add PERIC0 and PERIC1 clock support
dt-bindings: clock: exynos990: Add PERIC0 and PERIC1 clock units
clk: samsung: exynos990: Add missing USB clock registers to HSI0
clk: samsung: exynos990: Add LHS_ACEL gate clock for HSI0 and update CLK_NR_TOP
dt-bindings: clock: exynos990: Add LHS_ACEL clock ID for HSI0 block
clk: samsung: artpec-8: Add initial clock support for ARTPEC-8 SoC
clk: samsung: Add clock PLL support for ARTPEC-8 SoC
dt-bindings: clock: Add ARTPEC-8 clock controller
clk: samsung: exynos990: Add DPU_BUS and CMUREF mux/div and update CLKS_NR_TOP
dt-bindings: clock: exynos990: Extend clocks IDs
clk: samsung: exynos990: Replace bogus divs with fixed-factor clocks
clk: samsung: exynos990: Fix CMU_TOP mux/div bit widths
clk: samsung: exynos990: Use PLL_CON0 for PLL parent muxes
clk: samsung: pll: convert from round_rate() to determine_rate()
clk: samsung: cpu: convert from round_rate() to determine_rate()
clk: samsung: fsd: Add clk id for PCLK and PLL in CAM_CSI block
dt-bindings: clock: Add CAM_CSI clock macro for FSD
|
||
|
Stephen Boyd
|
8de790a3d4 |
RISC-V SpacemiT clock changes for 6.18
- Convert to use determine_rate() - Fix clocks of SSPA -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQKTBAABCgB9FiEEtbq4ycMbcRVnAiPcMarqR1lNu+0FAmi/6spfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldEI1 QkFCOEM5QzMxQjcxMTU2NzAyMjNEQzMxQUFFQTQ3NTk0REJCRUQACgkQMarqR1lN u+3P0xAAlnL5715RfU3JuSNtNWiH9DweP3pAfTShCyEGHy2V1cLUI9L1SEJ1522b qygfFV74LH0zuxZ4mc+0U8ji2CxveMG9Qixa87phRnD6cGemO94tlskq15jR20EJ DhX4ctou35/OOm0/AtzvbgITDHfKQHyp2zhz+cFSrHwXfNrgZXS+YqpDOnrf1QxV 0dsMZQ6wNwc8h8Q+ZK1VStmiOet+yEVJpWRwPks+oTnOaxWrRMDWR5kC2MuF8RRy NVKqXfcdRk/Ygq9TDfAWBRz9atWwnmSi1LN/6xL4fAln5efNEICjNJFgoELC3DfO ISMA36WC0ayWtXq5/T2CtOhhENOPwqmODYXrzByiqhQ84ufI+UB+Yr39vO2u5mh9 k5UTHNu4GFGFX9vBONm9jUssr+wVQXxSmrNYM8lFzifMTlAHxYlv2eZHK7NaRmjx H+0FOETbC2dUazaaQYy6Eo2kEne+JuXzVll7ennh5w99tmva5y5jk/HbXEg6FZNg MIpdZ9s4cHq+HxRZoS6GIdArccoUGXUw2pp9z8QpZpjljexg9eQClYjJEiZMzxpD wwypDnpcvf4W7LYot4BXQ7N1AQKVVUBbHsqQsTXd+ujIJWKqJ/My8VQ6ITY8aak5 wydX4jXzhiD+7bp+vBvRygJjoskCT37po4KjBvaoQO+5LKOSQFo= =Q42J -----END PGP SIGNATURE----- gpgsig -----BEGIN PGP SIGNATURE----- iQJIBAABCAAyFiEE9L57QeeUxqYDyoaDrQKIl8bklSUFAmjF6roUHHN3Ym95ZEBj aHJvbWl1bS5vcmcACgkQrQKIl8bklSWA3A/9GGUviqaeoMkk+l/cI/uxWy8Hps8D dRshjoitYIzwNjLGd3/EhmNe1WvVR5c3VBzEThkQxCqNhCFnmw4QOfNqYpgNcKeW E7N8xrN+nevt6D4VSaKHmGKqYknOoWtlAyAdx1wC9IiosL1NeZ/WGf9r5p+cNKft XaGbVwqttTw93yo5OFQys16WMT+8GTBnmb/SEhnknR7FqH02s/98rIqGiChO47jr wXYgl+jB2PX8yMbrFiJJzveOMBuzNo/Xj44ZJ7R0EUQDtFho53nM+WNtDyVzJdc8 5NgfGyc0f1cKxSX80NYAkoJlt2hUQY0rB3/jeYLE5iR1obV/qbSAMvPxV5USij1N QxFJ/aNt21qUtHLaa2JL6tBIZxujBS9rB7yZ/xEge1h9YpgBMxkc9L6TZ7nQq3fg lpb88Qw+pwKjpR3S5dSRcWi4UeiBGnoPReH79bUpktK+PSiChb5gbGFtVo5rzGcu dk3vTsW4MztTyrfPV9qu8JyhH3oOVIvud3nBzq6jpZOyfS6G9UhpkXrtFtK4IZfS Zz/x1BCLEV329FiyoCXlXZIOG3Ra9xU83GGoG8thtj68EXSYy/E4aqAdpuS0Ln2F pT2N9a/zb0y2KunB2iBlDrWbiWe0zBLsIDwwcxsNrA2Vl7iDkYSdrAVVygSJQDhP +aTIk8QbaUSX6Js= =vtqZ -----END PGP SIGNATURE----- Merge tag 'spacemit-clk-for-6.18-1' of https://github.com/spacemit-com/linux into clk-spacemit Pull RISC-V SpacemiT clk driver updates from Yixun Lan: - Convert to use clk_ops::determine_rate() - Fix parent clocks of SSPA in SpacemiT driver * tag 'spacemit-clk-for-6.18-1' of https://github.com/spacemit-com/linux: clk: spacemit: ccu_pll: convert from round_rate() to determine_rate() clk: spacemit: ccu_mix: convert from round_rate() to determine_rate() clk: spacemit: ccu_ddn: convert from round_rate() to determine_rate() clk: spacemit: fix sspax_clk dt-bindings: clock: spacemit: CLK_SSPA_I2S_BCLK for SSPA |
||
|
Stephen Boyd
|
73e6f3ae80 |
T-HEAD clock changes for v6.18
Updates for the T-HEAD TH1520 clock controller:
- Describe gate clocks with clk_gate so that clock gates can be clock
parents. This is similar to the mux clock refactor in
|
||
|
Stephen Boyd
|
1ef1b8b966 |
clk: renesas: Updates for v6.18 (take two)
- Add Ethernet clocks on RZ/T2H and RZ/N2H, - Add USB3.0 clocks and resets on RZ/G3E, - Add I3C clocks and resets on RZ/V2H and RZ/V2N, - Miscellaneous fixes and improvements. -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQQ9qaHoIs/1I4cXmEiKwlD9ZEnxcAUCaMPp/gAKCRCKwlD9ZEnx cAGPAQD89bTckHLbSnhw2BGKAOFc+rjEEGwA7ee6NKCLR3HhAwD+LtGbe3scGNI2 x6k+HLq4u1Ux5G0+Ad+WbvjjgmF4zQs= =0TxU -----END PGP SIGNATURE----- gpgsig -----BEGIN PGP SIGNATURE----- iQJIBAABCAAyFiEE9L57QeeUxqYDyoaDrQKIl8bklSUFAmjF43IUHHN3Ym95ZEBj aHJvbWl1bS5vcmcACgkQrQKIl8bklSW12w//TpYiWD4bqON/SbDeFOqERmqyDOV8 4Z+aWxTLEMuOLSJTgYNVi1PLbln9zDFUpaNr8DjA3u91M8HL3i2mcMY3Vd4dcEz+ zCYuDYqy3ds3qBl8zsFDeFwNMjkODRT6qJcbs6d1r/XMmOkFSDsSc103601QOlBt XKQlnyW4bpG9cWl70W9Aw85DKAqualZT9DqJ9D8r6s2GQUtfQnit/bVYqLRnmbRq UmID3IvYLkEKX79Ka7AyX9e7+tTOsx2jzVBMNXC9FZCFG8akpORiKMnuTT/EXgQw zj3udbaM9bilhRykNRShwg3BieLg0jHFIIH6DPUnr5vCkLHLyj1wRsdVd8QhG4uB vUqtTkMd4jyv/wmA7WyaD3OpqFrqLM0OXRT8G+IJChZY+bqrsAL8T0X43GEqgu1o /zLe9zt8X0U+NMoH5J9sce3a5LwHOqRV8IcemTG+SOcMuTiLRSQfJiEcDxpwm6Ea r71XthQQcZTJXO+NE1XrEqocI5/InPYkZ+vtE8MwigW+H9k9K+p842sbP0NHZ6xh KzcWjCmq4pa8FjSlktwZwkoA1duR7q7VIv1bDzrcbBPAlP/T5/5vdFHhvnCsKa3C 09B2X16CsJnA8/aqDt/FXeJVL/H1x+hcnByei4sM6TdkkM+4iVCRAGXaWQQtoSuv EfzDBoe3AUHASOY= =t0RP -----END PGP SIGNATURE----- Merge tag 'renesas-clk-for-v6.18-tag2' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers into clk-renesas Pull Renesas clk driver updates from Geert Uytterhoeven: - Add Ethernet clocks on Renesas RZ/T2H and RZ/N2H - Add USB3.0 clocks and resets on Renesas RZ/G3E - Add I3C clocks and resets on Renesas RZ/V2H and RZ/V2N - Add USB and remaining serial (SCI) clocks and resets on Renesas RZ/T2H and RZ/N2H - Add I3C and PCIe clocks and resets on Renesas RZ/G3S - Add DMAC and PWM (GPT) clocks and resets on Renesas RZ/G3E - Add Module Stop (MSTOP) support on RZ/G2L and Renesas RZ/G2UL - Convert from clk_ops::round_rate() to clk_ops::determine_rate() * tag 'renesas-clk-for-v6.18-tag2' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers: (27 commits) clk: renesas: r9a09g05[67]: Reduce differences clk: renesas: r9a09g047: Add USB3.0 clocks/resets clk: renesas: cpg-mssr: Fix memory leak in cpg_mssr_reserved_init() clk: renesas: r9a09g056: Add clock and reset entries for I3C clk: renesas: r9a09g057: Add clock and reset entries for I3C dt-bindings: clock: renesas,r9a09g047-cpg: Add USB3.0 core clocks clk: renesas: r9a09g077: Add Ethernet Subsystem core and module clocks clk: renesas: rzv2h: Simplify polling condition in __rzv2h_cpg_assert() clk: renesas: rzv2h: Re-assert reset on deassert timeout clk: renesas: rzg2l: Re-assert reset on deassert timeout clk: renesas: rzg2l: Simplify rzg2l_cpg_assert() and rzg2l_cpg_deassert() dt-bindings: clock: renesas,r9a09g077/87: Add Ethernet clock IDs clk: renesas: r9a09g047: Add GPT clocks and resets clk: renesas: r9a09g077: Add module clocks for SCI1-SCI5 clk: renesas: rzv2h: remove round_rate() in favor of determine_rate() clk: renesas: rzg2l: convert from round_rate() to determine_rate() clk: renesas: r9a07g04[34]: Use tabs instead of spaces clk: renesas: r9a07g043: Add MSTOP for RZ/G2UL clk: renesas: r9a07g044: Add MSTOP for RZ/G2L clk: renesas: r9a08g045: Add MSTOP for GPIO ... |
||
|
Stephen Boyd
|
6d8042baa8 |
clk: renesas: Fixes for v6.17
Fix a Clock Domain regression on R-Car M1A, R-Car H1, and RZ/A1. -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQQ9qaHoIs/1I4cXmEiKwlD9ZEnxcAUCaKV3jwAKCRCKwlD9ZEnx cIRVAQD83pY6Kp1iK7DXOHxbbH9DmargU3OLvL8YRAUNoWwloQEAhw+p3jecrMLv USRUu6QMPfTm7Rg6v8yNcNFDFK2SvQw= =6By1 -----END PGP SIGNATURE----- gpgsig -----BEGIN PGP SIGNATURE----- iQJIBAABCAAyFiEE9L57QeeUxqYDyoaDrQKIl8bklSUFAmjF4skUHHN3Ym95ZEBj aHJvbWl1bS5vcmcACgkQrQKIl8bklSWiJw//WNwsGzrkOo95mjalvi3pEn/L6Z3b M6oOr27Y3aJxcqPPp4Wfum2eTTUgoW13Dg65B7v3Q9TfnHoY+URnVoiHhVJ2ag5m lDNVv5sdOtCNlROtxZ85FFWnkww3WEtK5ouD46xKsFOZH2lcNRIHbso2PC/Q+Rwn leOJTuK3x00KnuInU5Z5F7shQf8Pb/uzr+IttiPvH+vc4nqM1cRunTKkDO6QLoGZ SBhIoexvBEtO/beI7N6ll9D4Pxs6pt5zF3ktZjXQ1IpjAUG0oTo3xXgYgubaTOi/ lmYtw483pTq9QG0SqUJpwnaPlre1EjYF+l/ndsj5EEK0iGtx8z1ERVOQdzirDKpV 1h4Eorx2GIWIpzIfqvNwktiCh2qlh+lYPqRgI71I5PMrkFkWS/XSkqUxsWgcskaU exhXLA4ChExd+GlOjwH2tWXCj8jIMTMYaRyVpdjanP2Rxw9Y2wySL2r+fHLnhN+I 5boLhnoR1n36krJgyYwKz2aQWLUNvwOu/MzwqzgK/dTF7G5BnCWv6BZRvOgRaloP TNgZI0tq15J4civ7uxYmthJkoXeX3JLK1UYQlMRskZH1Q2jTV8VMWAHIl3TXS0Cl zmkWWoKv+sIIVIHOBB/P1wC808GhvOxb5atxKrpDliXhdaflbRxXavZ199a99xr1 AW5qXqAGKB6Nbm8= =JfN2 -----END PGP SIGNATURE----- Merge tag 'renesas-clk-fixes-for-v6.17-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers into clk-fixes Pull a Renesas clk driver fix from Geert Uytterhoeven: - Fix a Clock Domain regression on R-Car M1A, R-Car H1, and RZ/A1 * tag 'renesas-clk-fixes-for-v6.17-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers: clk: renesas: mstp: Add genpd OF provider at postcore_initcall() |
||
Nathan Chancellor
|
025e87f8ea |
nilfs2: fix CFI failure when accessing /sys/fs/nilfs2/features/*
When accessing one of the files under /sys/fs/nilfs2/features when
CONFIG_CFI_CLANG is enabled, there is a CFI violation:
CFI failure at kobj_attr_show+0x59/0x80 (target: nilfs_feature_revision_show+0x0/0x30; expected type: 0xfc392c4d)
...
Call Trace:
<TASK>
sysfs_kf_seq_show+0x2a6/0x390
? __cfi_kobj_attr_show+0x10/0x10
kernfs_seq_show+0x104/0x15b
seq_read_iter+0x580/0xe2b
...
When the kobject of the kset for /sys/fs/nilfs2 is initialized, its ktype
is set to kset_ktype, which has a ->sysfs_ops of kobj_sysfs_ops. When
nilfs_feature_attr_group is added to that kobject via
sysfs_create_group(), the kernfs_ops of each files is sysfs_file_kfops_rw,
which will call sysfs_kf_seq_show() when ->seq_show() is called.
sysfs_kf_seq_show() in turn calls kobj_attr_show() through
->sysfs_ops->show(). kobj_attr_show() casts the provided attribute out to
a 'struct kobj_attribute' via container_of() and calls ->show(), resulting
in the CFI violation since neither nilfs_feature_revision_show() nor
nilfs_feature_README_show() match the prototype of ->show() in 'struct
kobj_attribute'.
Resolve the CFI violation by adjusting the second parameter in
nilfs_feature_{revision,README}_show() from 'struct attribute' to 'struct
kobj_attribute' to match the expected prototype.
Link: https://lkml.kernel.org/r/20250906144410.22511-1-konishi.ryusuke@gmail.com
Fixes:
|
||
SeongJae Park
|
c62cff4048 |
samples/damon/mtier: avoid starting DAMON before initialization
Commit |
||
|
SeongJae Park
|
e6b733ca2f |
samples/damon/prcl: avoid starting DAMON before initialization
Commit |
||
|
SeongJae Park
|
f826edeb88 |
samples/damon/wsse: avoid starting DAMON before initialization
Patch series "samples/damon: fix boot time enable handling fixup merge mistakes". First three patches of the patch series "mm/damon: fix misc bugs in DAMON modules" [1] were trying to fix boot time DAMON sample modules enabling issues. The issues are the modules can crash if those are enabled before DAMON is enabled, like using boot time parameter options. The three patches were fixing the issues by avoiding starting DAMON before the module initialization phase. However, probably by a mistake during a merge, only half of the change is merged, and the part for avoiding the starting of DAMON before the module initialized is missed. So the problem is not solved and thus the modules can still crash if enabled before DAMON is initialized. Fix those by applying the unmerged parts again. Note that the broken commits are merged into 6.17-rc1, but also backported to relevant stable kernels. So this series also needs to be merged into the stable kernels. Hence Cc-ing stable@. This patch (of 3): Commit |
||
Lance Yang
|
72291a5a0e |
MAINTAINERS: add Lance Yang as a THP reviewer
I've been actively digging into the MM/THP subsystem for over a year now, and there's a real interest in contributing more and getting further involved. Well, missing out on any more cool THP things is really a pain ;) Link: https://lkml.kernel.org/r/20250908104857.35397-1-lance.yang@linux.dev Signed-off-by: Lance Yang <lance.yang@linux.dev> Acked-by: David Hildenbrand <david@redhat.com> Acked-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Acked-by: Zi Yan <ziy@nvidia.com> Acked-by: Barry Song <baohua@kernel.org> Acked-by: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: Liam R. Howlett <Liam.Howlett@oracle.com> Cc: Nico Pache <npache@redhat.com> Cc: Ryan Roberts <ryan.roberts@arm.com> Cc: Dev Jain <dev.jain@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
Lorenzo Stoakes
|
615cd3705d |
MAINTAINERS: add Jann Horn as rmap reviewer
Jann has been an excellent contributor in all areas of memory management, and has demonstrated great expertise in the reverse mapping. It's therefore appropriate for him to become a reviewer. Link: https://lkml.kernel.org/r/20250908194959.820913-1-lorenzo.stoakes@oracle.com Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Acked-by: David Hildenbrand <david@redhat.com> Acked-by: Harry Yoo <harry.yoo@oracle.com> Acked-by: SeongJae Park <sj@kernel.org> Acked-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: Liam R. Howlett <Liam.Howlett@oracle.com> Cc: Jann Horn <jannh@google.com> Cc: Rik van Riel <riel@surriel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
|
SeongJae Park
|
04a06b139e |
mm/damon/sysfs: use dynamically allocated repeat mode damon_call_control
DAMON sysfs interface is using a single global repeat mode
damon_call_control variable for refresh_ms handling, for all DAMON
contexts. As a result, when there are more than one context, the single
global damon_call_control is unexpectedly over-written (corrupted).
Particularly the ->link field is overwritten by the multiple contexts and
this can cause a user hangup, and/or a kernel crash. Fix it by using
dynamically allocated damon_call_control object per DAMON context.
Link: https://lkml.kernel.org/r/20250908201513.60802-3-sj@kernel.org
Link: https://lore.kernel.org/20250904011738.930-1-yunjeong.mun@sk.com [1]
Link: https://lore.kernel.org/20250905035411.39501-1-sj@kernel.org [2]
Fixes:
|
||
|
SeongJae Park
|
e6a0deb6fa |
mm/damon/core: introduce damon_call_control->dealloc_on_cancel
Patch series "mm/damon/sysfs: fix refresh_ms control overwriting on
multi-kdamonds usages".
Automatic esssential DAMON/DAMOS status update feature of DAMON sysfs
interface (refresh_ms) is broken [1] for multiple DAMON contexts
(kdamonds) use case, since it uses a global single damon_call_control
object for all created DAMON contexts. The fields of the object,
particularly the list field is over-written for the contexts and it makes
unexpected results including user-space hangup and kernel crashes [2].
Fix it by extending damon_call_control for the use case and updating the
usage on DAMON sysfs interface to use per-context dynamically allocated
damon_call_control object.
This patch (of 2):
When damon_call_control->repeat is set, damon_call() is executed
asynchronously, and is eventually canceled when kdamond finishes. If the
damon_call_control object is dynamically allocated, finding the place to
deallocate the object is difficult. Introduce a new damon_call_control
field, namely dealloc_on_cancel, to ask the kdamond deallocates those
dynamically allocated objects when those are canceled.
Link: https://lkml.kernel.org/r/20250908201513.60802-3-sj@kernel.org
Link: https://lkml.kernel.org/r/20250908201513.60802-2-sj@kernel.org
Fixes:
|
||
Hugh Dickins
|
2da6de30e6 |
mm: folio_may_be_lru_cached() unless folio_test_large()
mm/swap.c and mm/mlock.c agree to drain any per-CPU batch as soon as a
large folio is added: so collect_longterm_unpinnable_folios() just wastes
effort when calling lru_add_drain[_all]() on a large folio.
But although there is good reason not to batch up PMD-sized folios, we
might well benefit from batching a small number of low-order mTHPs (though
unclear how that "small number" limitation will be implemented).
So ask if folio_may_be_lru_cached() rather than !folio_test_large(), to
insulate those particular checks from future change. Name preferred to
"folio_is_batchable" because large folios can well be put on a batch: it's
just the per-CPU LRU caches, drained much later, which need care.
Marked for stable, to counter the increase in lru_add_drain_all()s from
"mm/gup: check ref_count instead of lru before migration".
Link: https://lkml.kernel.org/r/57d2eaf8-3607-f318-e0c5-be02dce61ad0@google.com
Fixes:
|
||
|
Hugh Dickins
|
8d79ed36bf |
mm: revert "mm: vmscan.c: fix OOM on swap stress test"
This reverts commit |
||
|
Hugh Dickins
|
afb99e9f50 |
mm: revert "mm/gup: clear the LRU flag of a page before adding to LRU batch"
This reverts commit
|
||
|
Hugh Dickins
|
a09a8a1fbb |
mm/gup: local lru_add_drain() to avoid lru_add_drain_all()
In many cases, if collect_longterm_unpinnable_folios() does need to drain
the LRU cache to release a reference, the cache in question is on this
same CPU, and much more efficiently drained by a preliminary local
lru_add_drain(), than the later cross-CPU lru_add_drain_all().
Marked for stable, to counter the increase in lru_add_drain_all()s from
"mm/gup: check ref_count instead of lru before migration". Note for clean
backports: can take 6.16 commit
|
||
|
Hugh Dickins
|
98c6d25931 |
mm/gup: check ref_count instead of lru before migration
Patch series "mm: better GUP pin lru_add_drain_all()", v2. Series of lru_add_drain_all()-related patches, arising from recent mm/gup migration report from Will Deacon. This patch (of 5): Will Deacon reports:- When taking a longterm GUP pin via pin_user_pages(), __gup_longterm_locked() tries to migrate target folios that should not be longterm pinned, for example because they reside in a CMA region or movable zone. This is done by first pinning all of the target folios anyway, collecting all of the longterm-unpinnable target folios into a list, dropping the pins that were just taken and finally handing the list off to migrate_pages() for the actual migration. It is critically important that no unexpected references are held on the folios being migrated, otherwise the migration will fail and pin_user_pages() will return -ENOMEM to its caller. Unfortunately, it is relatively easy to observe migration failures when running pKVM (which uses pin_user_pages() on crosvm's virtual address space to resolve stage-2 page faults from the guest) on a 6.15-based Pixel 6 device and this results in the VM terminating prematurely. In the failure case, 'crosvm' has called mlock(MLOCK_ONFAULT) on its mapping of guest memory prior to the pinning. Subsequently, when pin_user_pages() walks the page-table, the relevant 'pte' is not present and so the faulting logic allocates a new folio, mlocks it with mlock_folio() and maps it in the page-table. Since commit |
||
Al Viro
|
f4cfb3c49f |
alpha: get rid of the remnants of BAD_PAGE and friends
unused since 2.4 times... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> |
||
|
Al Viro
|
90b0615fb5 |
SET_PAGE_DIR() users had been gone since 2.3.12pre1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> |
||
|
Al Viro
|
4d364c660a |
PAGE_PTR() had been last used outside of arch/* in 1.1.94
.. and in arch/* - circa 2.2.7. Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> # m68k Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> # m68k Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> |
||
|
Al Viro
|
9892775af5 |
csky: remove BS check for FAULT_FLAG_ALLOW_RETRY
flags are initialized as FAULT_FLAG_DEFAULT, and the only thing done to that afterwards is |=; since FAULT_FLAG_DEFAULT already includes FAULT_FLAG_ALLOW_RETRY, it's guaranteed to remain there all along. Reviewed-by: Guo Ren (Alibaba Damo Academy) <guoren@kernel.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> |
||
Sean Christopherson
|
a001cd248a |
rseq/selftests: Use weak symbol reference, not definition, to link with glibc
Add "extern" to the glibc-defined weak rseq symbols to convert the rseq
selftest's usage from weak symbol definitions to weak symbol _references_.
Effectively re-defining the glibc symbols wreaks havoc when building with
-fno-common, e.g. generates segfaults when running multi-threaded programs,
as dynamically linked applications end up with multiple versions of the
symbols.
Building with -fcommon, which until recently has the been the default for
GCC and clang, papers over the bug by allowing the linker to resolve the
weak/tentative definition to glibc's "real" definition.
Note, the symbol itself (or rather its address), not the value of the
symbol, is set to 0/NULL for unresolved weak symbol references, as the
symbol doesn't exist and thus can't have a value. Check for a NULL rseq
size pointer to handle the scenario where the test is statically linked
against a libc that doesn't support rseq in any capacity.
Fixes:
|
||
Thomas Gleixner
|
6eb350a223 |
rseq: Protect event mask against membarrier IPI
rseq_need_restart() reads and clears task::rseq_event_mask with preemption
disabled to guard against the scheduler.
But membarrier() uses an IPI and sets the PREEMPT bit in the event mask
from the IPI, which leaves that RMW operation unprotected.
Use guard(irq) if CONFIG_MEMBARRIER is enabled to fix that.
Fixes:
|
||
Linus Torvalds
|
5cd64d4f92 |
A fix for a race condition around r_parent tracking that took a long
time to track down from Alex and some fixes for potential crashes on accessing invalid memory from Max and myself. All marked for stable. -----BEGIN PGP SIGNATURE----- iQFHBAABCAAxFiEEydHwtzie9C7TfviiSn/eOAIR84sFAmjFk5wTHGlkcnlvbW92 QGdtYWlsLmNvbQAKCRBKf944AhHzi/b1B/9Wm5Sb1Gja4BK04xrtQ76VWAquiPp+ CSB685OnFPr3437sIe06ZDZjVnqqLyYVFBmUlVOlkSfYaR4uHtznpvdvhVlerN+y UaP/qHp5vacEf3n+MWCUXnDTqau65J+wDri64HNOWyl3UvZ/aaxz9UdZROqNQUMj H1OdYgGr1n4DLT/iBntr8t9GAuZ5/bjwXWJGZ7xkaO4hjth6fAzw45BpX4Iuoox9 3ZPBJjz5p1SiXtREDL1eiyipE5o7Fg+R0QIIH6tQaH8KORyZYZDjdj2jyPg2+Wq2 N1vFP6IxRZyZ3hapK3ZCQjnAM26lZJ+aaWvFjT45VdLz88HJxvDDV/1k =c7ou -----END PGP SIGNATURE----- Merge tag 'ceph-for-6.17-rc6' of https://github.com/ceph/ceph-client Pull ceph fixes from Ilya Dryomov: "A fix for a race condition around r_parent tracking that took a long time to track down from Alex and some fixes for potential crashes on accessing invalid memory from Max and myself. All marked for stable" * tag 'ceph-for-6.17-rc6' of https://github.com/ceph/ceph-client: libceph: fix invalid accesses to ceph_connection_v1_info ceph: fix crash after fscrypt_encrypt_pagecache_blocks() error ceph: always call ceph_shift_unused_folios_left() ceph: fix race condition where r_parent becomes stale before sending message ceph: fix race condition validating r_parent before applying state |
||
|
Linus Torvalds
|
395d68e5dd |
regulator: Fix for v6.17
One fix for sy7636a which got confused about which device to use to manage the lifecycle of the power good GPIO because it's looked up from the parent device due to the way DT bindings work. -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmjFYoQACgkQJNaLcl1U h9A5dgf+ITq9vjSnnGw2RKk7AATDIe9YQZQoqadKVrHwEbv2J1iH2MxCXttKz6JQ DL0p/B6QpT64Df/FztrX24AQsK+cUZOnKsrKW7uEKTUcbrC2fInr9jQ1BEwHb/ch 4/mURACeO7YsXGEET3r6voT4HaAeApaB6InPeGcnvWWA7DZBZ+yNp94nCCu+tk6k U/7lrHByGkyablCvNhq2RrSbI17kasBdq6Tvt3XI7tCmvy7Aqjp4QsEkttS9yYE+ U/RGDoO+OzvXcZ6C6oeJKn7sdsDukcakTzFZBSldt4oS08CatZOynyJSM6y2DZx1 sfCICr3qssLJRdMl0I1G/0dJt9XZ5A== =6rOw -----END PGP SIGNATURE----- Merge tag 'regulator-fix-v6.17-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator Pull regulator fix from Mark Brown: "One fix for sy7636a which got confused about which device to use to manage the lifecycle of the power good GPIO because it's looked up from the parent device due to the way DT bindings work" * tag 'regulator-fix-v6.17-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator: regulator: sy7636a: fix lifecycle of power good gpio |
||
|
Linus Torvalds
|
b891d11b74 |
Driver core fixes for 6.17-rc6
- Fix UAF in cgroup pressure polling by using kernfs_get_active_of()
to prevent operations on released file descriptors.
- Fix unresolved intra-doc link in the documentation of struct Device
when CONFIG_DRM != y.
- Update the DMA Rust MAINTAINERS entry.
-----BEGIN PGP SIGNATURE-----
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LucTAQCpnAg/IpT60owrTQLZkP9MAj4+h53ubl3jQJXGQJl8qQD8CWT8u5iZvEhb
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Merge tag 'driver-core-6.17-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core
Pull driver core fixes from Danilo Krummrich:
- Fix UAF in cgroup pressure polling by using kernfs_get_active_of()
to prevent operations on released file descriptors
- Fix unresolved intra-doc link in the documentation of struct Device
when CONFIG_DRM != y
- Update the DMA Rust MAINTAINERS entry
* tag 'driver-core-6.17-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core:
MAINTAINERS: Update the DMA Rust entry
kernfs: Fix UAF in polling when open file is released
rust: device: fix unresolved link to drm::Device
|
||
Marc Kleine-Budde
|
fbfa8f4f3d |
Merge patch series "can: rcar_canfd: R-Car CANFD Improvements"
Biju <biju.das.au@gmail.com> says:
From: Biju Das <biju.das.jz@bp.renesas.com>
The calculation formula for nominal bit rate of classical CAN is same as
that of nominal bit rate of CANFD on the RZ/G3E SoC and R-Car Gen4
compared to other SoCs. Update the nominal bit rate constants.
Apart from this, for replacing function-like macros, introduced
rcar_canfd_compute_{nominal,data}_bit_rate_cfg().
v2->v3:
* Replaced "shared_bittiming"->"shared_can_regs" as it is same for RZ/G3E
and R-Car Gen4.
* Updated commit header and description for patch#1.
* Added Rb tag from Geert for patch #2,#3 and #4.
* Dropped _MASK suffix from RCANFD_CFG_* macros.
* Dropped _MASK suffix from RCANFD_NCFG_NBRP_MASK macro.
* Dropped _MASK suffix from the macro RCANFD_DCFG_DBRP_MASK.
* Followed the order as used in struct can_bittiming{_const} for easy
maintenance.
v1->v2:
* Dropped patch#2 as it is accepted.
* Moved patch#4 to patch#2.
* Updated commit header and description for patch#2.
* Kept RCANFD_CFG* macro definitions to give a meaning to the magic
number using GENMASK macro and used FIELD_PREP to extract value.
* Split patch#3 for computing nominal and data bit rate config separate.
* Updated rcar_canfd_compute_nominal_bit_rate_cfg() to handle
nominal bit rate configuration for both classical CAN and CANFD.
* Replaced RCANFD_NCFG_NBRP->RCANFD_NCFG_NBRP_MASK and used FIELD_PREP to
extract value.
* Replaced RCANFD_DCFG_DBRP->RCANFD_DCFG_DBRP_MASK and used FIELD_PREP to
extract value.
Link: https://patch.msgid.link/20250908120940.147196-1-biju.das.jz@bp.renesas.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
|
||
Biju Das
|
33815032b0 |
can: rcar_canfd: Simplify data bit rate config
Introduce rcar_canfd_compute_data_bit_rate_cfg() for simplifying data bit rate configuration by replacing function-like macros. Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> Link: https://patch.msgid.link/20250908120940.147196-5-biju.das.jz@bp.renesas.com Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> |
||
|
Biju Das
|
02d274adf4 |
can: rcar_canfd: Simplify nominal bit rate config
Introduce rcar_canfd_compute_nominal_bit_rate_cfg() for simplifying nominal bit rate configuration by replacing function-like macros. Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> Link: https://patch.msgid.link/20250908120940.147196-4-biju.das.jz@bp.renesas.com Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> |
||
|
Biju Das
|
726213c8e7 |
can: rcar_canfd: Update RCANFD_CFG_* macros
Update RCANFD_CFG_* macros to give a meaning to the magic number using GENMASK macro and extract the values using FIELD_PREP macro. Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> Link: https://patch.msgid.link/20250908120940.147196-3-biju.das.jz@bp.renesas.com Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> |
||
|
Biju Das
|
100fafc3e4 |
can: rcar_canfd: Update bit rate constants for RZ/G3E and R-Car Gen4
The calculation formula for nominal bit rate of classical CAN is the same as that of nominal bit rate of CANFD on the RZ/G3E and R-Car Gen4 SoCs compared to other SoCs. Update nominal bit rate constants. Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://patch.msgid.link/20250908120940.147196-2-biju.das.jz@bp.renesas.com [mkl: slightly improve wording of commit message] Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> |
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Stéphane Grosjean
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f1880f9cc1 |
can: peak: Modification of references to email accounts being deleted
With the upcoming deletion of @peak-system.com accounts and following the acquisition of PEAK-System and its brand by HMS-Networks, this fix aims to migrate all address references to @hms-networks.com, as well as to map my personal committer addresses to author addresses, while taking the opportunity to correct the accent on the first ‘e’ of my first name. Signed-off-by: Stéphane Grosjean <stephane.grosjean@hms-networks.com> Link: https://patch.msgid.link/20250912081820.86314-1-stephane.grosjean@free.fr Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> |
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Vincent Mailhol
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4827dcc19c |
can: dev: sort includes by alphabetical order
Includes are out of order in drivers/net/can/dev/dev.c Sort them by alphabetical order. Signed-off-by: Vincent Mailhol <mailhol@kernel.org> Link: https://patch.msgid.link/20250830152107.694201-2-mailhol@kernel.org Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> |
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Vincent Mailhol
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39b8e0fef1 |
MAINTAINERS: update Vincent Mailhol's email address
Now that I have received my kernel.org account, I am changing my email address from mailhol.vincent@wanadoo.fr to mailhol@kernel.org. The wanadoo.fr address was my first email which I created when I was a kid and has a special meaning to me, but it is restricted to a maximum of 50 messages per hour which starts to be problematic on threads where many people are CC-ed. Update all the MAINTAINERS entries accordingly and map the old address to the new one. I remain reachable from my old address. The different copyright notices mentioning my old address are kept as-is for the moment. I will update those one at a time only if I need to touch those files. Signed-off-by: Vincent Mailhol <mailhol@kernel.org> Link: https://patch.msgid.link/20250826105255.35501-2-mailhol@kernel.org Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> |
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Xichao Zhao
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646cb48d44 |
can: m_can: use us_to_ktime() where appropriate
The tx_coalesce_usecs_irq are more suitable for using the us_to_ktime(). This can make the code more concise and enhance readability. Signed-off-by: Xichao Zhao <zhao.xichao@vivo.com> Reviewed-by: Vincent Mailhol <mailhol@kernel.org> Link: https://patch.msgid.link/20250825090904.248927-1-zhao.xichao@vivo.com [mkl: remove not needed line break] Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> |
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Thadeu Lima de Souza Cascardo
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0e2ee70291 |
media: uvcvideo: Mark invalid entities with id UVC_INVALID_ENTITY_ID
Per UVC 1.1+ specification 3.7.2, units and terminals must have a non-zero unique ID. ``` Each Unit and Terminal within the video function is assigned a unique identification number, the Unit ID (UID) or Terminal ID (TID), contained in the bUnitID or bTerminalID field of the descriptor. The value 0x00 is reserved for undefined ID, ``` If we add a new entity with id 0 or a duplicated ID, it will be marked as UVC_INVALID_ENTITY_ID. In a previous attempt commit |
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Ricardo Ribalda
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0f99b8bed4 |
media: uvcvideo: Support UVC_CROSXU_CONTROL_IQ_PROFILE
The ChromeOS XU provides a control to change the IQ profile for a camera. It can be switched from VIVID (a.k.a. standard) to NONE (a.k.a. natural). Wire it up to the standard v4l2 control. Signed-off-by: Ricardo Ribalda <ribalda@chromium.org> Reviewed-by: Hans de Goede <hansg@kernel.org> Signed-off-by: Hans de Goede <hansg@kernel.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org> |