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Jens Axboe 107b2648ed io-wq: don't call kXalloc_node() with non-online node [ Upstream commit `7563439adf` ] Glauber reports a crash on init on a box he has: RIP: 0010:__alloc_pages_nodemask+0x132/0x340 Code: 18 01 75 04 41 80 ce 80 89 e8 48 8b 54 24 08 8b 74 24 1c c1 e8 0c 48 8b 3c 24 83 e0 01 88 44 24 20 48 85 d2 0f 85 74 01 00 00 <3b> 77 08 0f 82 6b 01 00 00 48 89 7c 24 10 89 ea 48 8b 07 b9 00 02 RSP: 0018:ffffb8be4d0b7c28 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000000000e8e8 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000002080 RBP: 0000000000012cc0 R08: 0000000000000000 R09: 0000000000000002 R10: 0000000000000dc0 R11: ffff995c60400100 R12: 0000000000000000 R13: 0000000000012cc0 R14: 0000000000000001 R15: ffff995c60db00f0 FS: 00007f4d115ca900(0000) GS:ffff995c60d80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000002088 CR3: 00000017cca66002 CR4: 00000000007606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: alloc_slab_page+0x46/0x320 new_slab+0x9d/0x4e0 ___slab_alloc+0x507/0x6a0 ? io_wq_create+0xb4/0x2a0 __slab_alloc+0x1c/0x30 kmem_cache_alloc_node_trace+0xa6/0x260 io_wq_create+0xb4/0x2a0 io_uring_setup+0x97f/0xaa0 ? io_remove_personalities+0x30/0x30 ? io_poll_trigger_evfd+0x30/0x30 do_syscall_64+0x5b/0x1c0 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f4d116cb1ed which is due to the 'wqe' and 'worker' allocation being node affine. But it isn't valid to call the node affine allocation if the node isn't online. Setup structures for even offline nodes, as usual, but skip them in terms of thread setup to not waste resources. If the node isn't online, just alloc memory with NUMA_NO_NODE. Reported-by: Glauber Costa <glauber@scylladb.com> Tested-by: Glauber Costa <glauber@scylladb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Sasha Levin <sashal@kernel.org>		History 2020-03-05 16:45:12 +01:00
arch	ARM: dts: sti: fixup sound frame-inversion for stihxxx-b2120.dtsi	2020-03-05 16:45:07 +01:00
block	block, bfq: do not plug I/O for bfq_queues with no proc refs	2020-02-24 08:38:09 +01:00
certs	certs: Add wrapper function to check blacklisted binary hash	2019-11-12 12:25:50 +11:00
crypto	crypto: rename sm3-256 to sm3 in hash_algo_name	2020-02-28 17:23:43 +01:00
Documentation	mm: Avoid creating virtual address aliases in brk()/mmap()/mremap()	2020-02-28 17:23:37 +01:00
drivers	ice: Use correct netif error function	2020-03-05 16:45:12 +01:00
fs	io-wq: don't call kXalloc_node() with non-online node	2020-03-05 16:45:12 +01:00
include	timers/nohz: Update NOHZ load in remote tick	2020-03-05 16:45:04 +01:00
init	Revert "um: Enable CONFIG_CONSTRUCTORS"	2020-02-01 09:33:00 +00:00
ipc	Revert "ipc,sem: remove uneeded sem_undo_list lock usage in exit_sem()"	2020-02-28 17:23:36 +01:00
kernel	sched/fair: Prevent unlimited runtime on throttled group	2020-03-05 16:45:05 +01:00
lib	crypto: chacha20poly1305 - prevent integer overflow on large input	2020-02-28 17:23:40 +01:00
LICENSES	LICENSES: Rename other to deprecated	2019-05-03 06:34:32 -06:00
mm	mm: Avoid creating virtual address aliases in brk()/mmap()/mremap()	2020-02-28 17:23:37 +01:00
net	cfg80211: check wiphy driver existence for drvinfo report	2020-03-05 16:45:05 +01:00
samples	samples/bpf: Set -fno-stack-protector when building BPF programs	2020-02-24 08:38:15 +01:00
scripts	scripts/get_maintainer.pl: deprioritize old Fixes: addresses	2020-02-28 17:23:43 +01:00
security	selinux: ensure we cleanup the internal AVC counters on error in avc_update()	2020-02-24 08:38:19 +01:00
sound	ASoC: SOF: Intel: hda: Add iDisp4 DAI	2020-02-28 17:23:45 +01:00
tools	ipv6: Fix route replacement with dev-only route	2020-03-05 16:45:03 +01:00
usr	gen_initramfs_list.sh: fix 'bad variable name' error	2020-01-04 00:00:48 +09:00
virt	KVM: arm64: Treat emulated TVAL TimerValue as a signed 32-bit integer	2020-02-14 16:53:04 -05:00
.clang-format	clang-format: Update with the latest for_each macro list	2019-08-31 10:00:51 +02:00
.cocciconfig	scripts: add Linux .cocciconfig for coccinelle	2016-07-22 12:13:39 +02:00
.get_maintainer.ignore	Opt out of scripts/get_maintainer.pl	2019-05-16 10:53:40 -07:00
.gitattributes	.gitattributes: use 'dts' diff driver for dts files	2019-12-04 19:44:11 -08:00
.gitignore	modpost: dump missing namespaces into a single modules.nsdeps file	2019-11-11 20:10:01 +09:00
.mailmap	MAINTAINERS: update my email address	2020-01-11 14:33:39 -08:00
COPYING	COPYING: use the new text with points to the license files	2018-03-23 12:41:45 -06:00
CREDITS	Linux 5.4-rc4	2019-10-29 04:43:29 -06:00
Kbuild	kbuild: do not descend to ./Kbuild when cleaning	2019-08-21 21:03:58 +09:00
Kconfig	docs: kbuild: convert docs to ReST and rename to *.rst	2019-06-14 14:21:21 -06:00
MAINTAINERS	MAINTAINERS: Update drm/i915 bug filing URL	2020-02-28 17:23:36 +01:00
Makefile	Linux 5.5.7	2020-02-28 17:23:45 +01:00
README	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00

README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.