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mm/kmemleak: increase the max mem pool to 1M

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There are some machines with slow disk and fast CPUs.  When they are under
memory pressure, it could take a long time to swap before the OOM kicks in
to free up some memory.  As the results, it needs a large mem pool for
kmemleak or suffering from higher chance of a kmemleak metadata allocation
failure.  524288 proves to be the good number for all architectures here.
Increase the upper bound to 1M to leave some room for the future.

Link: http://lkml.kernel.org/r/1565807572-26041-1-git-send-email-cai@lca.pw
Signed-off-by: Qian Cai <cai@lca.pw>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Qian Cai 2019-09-23 15:34:10 -07:00 committed by Linus Torvalds
parent 0e965a6bda
commit c59180ae3e
1 changed files with 1 additions and 1 deletions
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lib/Kconfig.debug
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@ -579,7 +579,7 @@ config DEBUG_KMEMLEAK
config DEBUG_KMEMLEAK_MEM_POOL_SIZE config DEBUG_KMEMLEAK_MEM_POOL_SIZE
int "Kmemleak memory pool size" int "Kmemleak memory pool size"
depends on DEBUG_KMEMLEAK depends on DEBUG_KMEMLEAK
range 200 40000 range 200 1000000
default 16000 default 16000
help help
Kmemleak must track all the memory allocations to avoid Kmemleak must track all the memory allocations to avoid