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| author | Vladimir Davydov <vdavydov@parallels.com> | 2014-06-04 16:07:04 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-06-04 16:53:58 -0700 |
| commit | cea371f4f39ced101d27264eddb8cf8c749fdd00 (patch) | |
| tree | 77949b74e25554e0cfbc3cc1647d1014d4eb75ba /mm/slab_common.c | |
| parent | 56a3c655a3d31cb1afef25b530b5ef6a1e7ddefd (diff) | |
| download | lwn-cea371f4f39ced101d27264eddb8cf8c749fdd00.tar.gz lwn-cea371f4f39ced101d27264eddb8cf8c749fdd00.zip | |
slab: document kmalloc_order
Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/slab_common.c')
| -rw-r--r-- | mm/slab_common.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/mm/slab_common.c b/mm/slab_common.c index 1950c8f4d1a6..2834bc2886fd 100644 --- a/mm/slab_common.c +++ b/mm/slab_common.c @@ -582,6 +582,11 @@ void __init create_kmalloc_caches(unsigned long flags) } #endif /* !CONFIG_SLOB */ +/* + * To avoid unnecessary overhead, we pass through large allocation requests + * directly to the page allocator. We use __GFP_COMP, because we will need to + * know the allocation order to free the pages properly in kfree. + */ void *kmalloc_order(size_t size, gfp_t flags, unsigned int order) { void *ret; |