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| author |   Johannes Berg <johannes.berg@intel.com> | 2021-02-24 12:01:04 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2021-02-24 13:38:27 -0800 |
| commit | ca220593208d8c433a761738461c31b1bf0be1f9 (patch) | |
| tree | 257913870a8c9b7537da75d8abbc34b81eb3575c /mm/debug.c | |
| parent | mm/slab: minor coding style tweaks (diff) | |
| download | wireguard-linux-ca220593208d8c433a761738461c31b1bf0be1f9.tar.xz wireguard-linux-ca220593208d8c433a761738461c31b1bf0be1f9.zip | |
mm/slub: disable user tracing for kmemleak caches by default
If kmemleak is enabled, it uses a kmem cache for its own objects. These
objects are used to hold information kmemleak uses, including a stack
trace. If slub_debug is also turned on, each of them has *another* stack
trace, so the overhead adds up, and on my tests (on ARCH=um, admittedly)
2/3rds of the allocations end up being doing the stack tracing.
Turn off SLAB_STORE_USER if SLAB_NOLEAKTRACE was given, to avoid storing
the essentially same data twice.
Link: https://lkml.kernel.org/r/20210113215114.d94efa13ba30.I117b6764e725b3192318bbcf4269b13b709539ae@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/debug.c')
0 files changed, 0 insertions, 0 deletions