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| author | Glauber Costa <glommer@parallels.com> | 2012-08-03 22:51:37 +0400 |
|---|---|---|
| committer | Pekka Enberg <penberg@kernel.org> | 2012-08-16 09:25:03 +0300 |
| commit | d9b7f22623b5fa9cc189581dcdfb2ac605933bf4 (patch) | |
| tree | 6287535fbe9d67a743c2c16551042447a1e7d424 | |
| parent | 0d7614f09c1ebdbaa1599a5aba7593f147bf96ee (diff) | |
| download | blackbird-obmc-linux-d9b7f22623b5fa9cc189581dcdfb2ac605933bf4.tar.gz blackbird-obmc-linux-d9b7f22623b5fa9cc189581dcdfb2ac605933bf4.zip | |
slub: use free_page instead of put_page for freeing kmalloc allocation
When freeing objects, the slub allocator will most of the time free
empty pages by calling __free_pages(). But high-order kmalloc will be
diposed by means of put_page() instead. It makes no sense to call
put_page() in kernel pages that are provided by the object allocators,
so we shouldn't be doing this ourselves. Aside from the consistency
change, we don't change the flow too much. put_page()'s would call its
dtor function, which is __free_pages. We also already do all of the
Compound page tests ourselves, and the Mlock test we lose don't really
matter.
Signed-off-by: Glauber Costa <glommer@parallels.com>
Acked-by: Christoph Lameter <cl@linux.com>
CC: David Rientjes <rientjes@google.com>
CC: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
| -rw-r--r-- | mm/slub.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/slub.c b/mm/slub.c index 8f78e2577031..c83fe96f5e42 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -3477,7 +3477,7 @@ void kfree(const void *x) if (unlikely(!PageSlab(page))) { BUG_ON(!PageCompound(page)); kmemleak_free(x); - put_page(page); + __free_pages(page, compound_order(page)); return; } slab_free(page->slab, page, object, _RET_IP_); |
