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mm/slob: Use free_page instead of put_page for page-size kmalloc allocations

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When freeing objects, the slob allocator currently free empty pages
calling __free_pages(). However, page-size kmallocs are disposed
using put_page() instead.

It makes no sense to call put_page() for kernel pages that are provided
by the object allocator, so we shouldn't be doing this ourselves.

This is based on:
commit d9b7f22623b5fa9cc189581dcdfb2ac605933bf4
Author: Glauber Costa <glommer@parallels.com>
slub: use free_page instead of put_page for freeing kmalloc allocation

Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Matt Mackall <mpm@selenic.com>
Acked-by: Glauber Costa <glommer@parallels.com>
Signed-off-by: Ezequiel Garcia <elezegarcia@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This commit is contained in:
Ezequiel Garcia 2012-10-22 09:04:31 -03:00 committed by Pekka Enberg
parent 242860a47a
commit 8cf9864b13
1 changed files with 1 additions and 1 deletions
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mm/slob.c
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@ -500,7 +500,7 @@ void kfree(const void *block)
unsigned int *m = (unsigned int *)(block - align); unsigned int *m = (unsigned int *)(block - align);
slob_free(m, *m + align); slob_free(m, *m + align);
} else } else
put_page(sp); __free_pages(sp, compound_order(sp));
} }
EXPORT_SYMBOL(kfree); EXPORT_SYMBOL(kfree);