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author | Gregory Price <gourry.memverge@gmail.com> | 2024-02-02 20:02:38 +0300 |
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committer | Andrew Morton <akpm@linux-foundation.org> | 2024-02-22 21:24:47 +0300 |
commit | 274519ed414bd2b9a77c5db78ee51778d37ceacf (patch) | |
tree | ce7ca168ec3c9df5c2d44d78e955a726f599e571 /arch/arm/configs | |
parent | fa3bea4e1f8202d787709b7e3654eb0a99aed758 (diff) | |
download | linux-274519ed414bd2b9a77c5db78ee51778d37ceacf.tar.xz |
mm/mempolicy: protect task interleave functions with tsk->mems_allowed_seq
In the event of rebind, pol->nodemask can change at the same time as an
allocation occurs. We can detect this with tsk->mems_allowed_seq and
prevent a miscount or an allocation failure from occurring.
The same thing happens in the allocators to detect failure, but this can
prevent spurious failures in a much smaller critical section.
[gourry.memverge@gmail.com: weighted interleave checks wrong parameter]
Link: https://lkml.kernel.org/r/20240206192853.3589-1-gregory.price@memverge.com
Link: https://lkml.kernel.org/r/20240202170238.90004-5-gregory.price@memverge.com
Signed-off-by: Gregory Price <gregory.price@memverge.com>
Suggested-by: "Huang, Ying" <ying.huang@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Hasan Al Maruf <Hasan.Maruf@amd.com>
Cc: Honggyu Kim <honggyu.kim@sk.com>
Cc: Hyeongtak Ji <hyeongtak.ji@sk.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Rakie Kim <rakie.kim@sk.com>
Cc: Ravi Jonnalagadda <ravis.opensrc@micron.com>
Cc: Srinivasulu Thanneeru <sthanneeru.opensrc@micron.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'arch/arm/configs')
0 files changed, 0 insertions, 0 deletions