Commit 8cf9864b authored Oct 22, 2012 by Ezequiel Garcia Committed by Pekka Enberg Oct 31, 2012

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



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 d9b7f226
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>

parent 242860a4

mm/slob.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -500,7 +500,7 @@ void kfree(const void *block)
		unsigned int m = (unsigned int )(block - align);
		slob_free(m, *m + align);
		} else
		put_page(sp);
		__free_pages(sp, compound_order(sp));
		}
		EXPORT_SYMBOL(kfree);