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Marco Elver b7792fe79f kfence: allow use of a deferrable timer 
[ Upstream commit 737b6a10ac ]

Allow the use of a deferrable timer, which does not force CPU wake-ups
when the system is idle.  A consequence is that the sample interval
becomes very unpredictable, to the point that it is not guaranteed that
the KFENCE KUnit test still passes.

Nevertheless, on power-constrained systems this may be preferable, so
let's give the user the option should they accept the above trade-off.

Link: https://lkml.kernel.org/r/20220308141415.3168078-1-elver@google.com
Signed-off-by: Marco Elver <elver@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Stable-dep-of: e64f81946a ("kfence: skip __GFP_THISNODE allocations on NUMA systems")
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-03-13 12:50:49 +01:00
..
kunit kunit: tool: make --raw_output support only showing kunit output 2021-08-13 13:32:01 -06:00
checkpatch.rst docs: checkpatch: Document and segregate more checkpatch message types 2021-06-14 15:37:12 -06:00
coccinelle.rst Documentation: Coccinelle: Improve command example for debugging patches 2020-12-03 15:45:18 -07:00
gcov.rst docs/gcov: Convert two tags to ref in dev-tools/gov.rst 2021-04-08 11:19:43 -06:00
gdb-kernel-debugging.rst docs/scripts/gdb: add necessary make scripts_gdb step 2023-03-10 09:39:53 +01:00
index.rst Documentation: dev-tools: Add Testing Overview 2021-04-15 14:53:02 -06:00
kasan.rst mm/kasan: move kasan.fault to mm/kasan/report.c 2021-09-03 09:58:14 -07:00
kcov.rst Documentation: fix typos found in process, dev-tools, and doc-guide subdirectories 2020-12-03 15:55:04 -07:00
kcsan.rst kcsan: Rework atomic.h into permissive.h 2021-07-20 13:49:43 -07:00
kfence.rst kfence: allow use of a deferrable timer 2025-03-13 12:50:49 +01:00
kgdb.rst Documentation: kgdb: Fix a typo 2020-11-18 13:47:17 -07:00
kmemleak.rst mm,kmemleak-test.c: move kmemleak-test.c to samples dir 2020-10-13 18:38:27 -07:00
kselftest.rst Documentation: kselftest: fix path to test module files 2021-04-02 16:17:18 -06:00
sparse.rst doc: add link to sparse's home page/internal docs 2020-07-05 14:32:56 -06:00
testing-overview.rst docs: dev-tools: testing-overview.rst: avoid using ReST :doc:foo markup 2021-06-17 13:24:37 -06:00
ubsan.rst ubsan: remove UBSAN_MISC in favor of individual options 2020-12-15 22:46:19 -08:00