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| author | Catalin Marinas <catalin.marinas@arm.com> | 2009-10-28 13:33:08 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2009-10-28 13:33:08 +0000 |
| commit | e7cb55b946a2182c347047dc903c6ed0daef100c (patch) | |
| tree | 28cc01bd513418a4917358b748481d3a31f69ab1 /mm | |
| parent | 012abeea669ea49636cf952d13298bb68654146a (diff) | |
| download | linux-e7cb55b946a2182c347047dc903c6ed0daef100c.tar.gz linux-e7cb55b946a2182c347047dc903c6ed0daef100c.tar.bz2 linux-e7cb55b946a2182c347047dc903c6ed0daef100c.zip | |
kmemleak: Do not use off-slab management with SLAB_NOLEAKTRACE
With the slab allocator, if off-slab management is enabled for the
kmem_caches used by kmemleak, it leads to recursive calls into
kmemleak_alloc(). Off-slab management can be triggered by other config
options increasing the slab size, e.g. DEBUG_PAGEALLOC.
Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/slab.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/mm/slab.c b/mm/slab.c index 7dfa481c96ba..646db3085193 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -2261,9 +2261,11 @@ kmem_cache_create (const char *name, size_t size, size_t align, /* * Determine if the slab management is 'on' or 'off' slab. * (bootstrapping cannot cope with offslab caches so don't do - * it too early on.) + * it too early on. Always use on-slab management when + * SLAB_NOLEAKTRACE to avoid recursive calls into kmemleak) */ - if ((size >= (PAGE_SIZE >> 3)) && !slab_early_init) + if ((size >= (PAGE_SIZE >> 3)) && !slab_early_init && + !(flags & SLAB_NOLEAKTRACE)) /* * Size is large, assume best to place the slab management obj * off-slab (should allow better packing of objs). |