Commit 47f43e7e authored Sep 28, 2010 by Andi Kleen

HWPOISON: Stop shrinking at right page count



When we call the slab shrinker to free a page we need to stop at
page count one because the caller always holds a single reference, not zero.

This avoids useless looping over slab shrinkers and freeing too much
memory.

Reviewed-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>

parent 0d9ee6a2

mm/memory-failure.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -235,7 +235,7 @@ void shake_page(struct page *p, int access)
		int nr;
		do {
		nr = shrink_slab(1000, GFP_KERNEL, 1000);
		if (page_count(p) == 0)
		if (page_count(p) == 1)
		break;
		} while (nr > 10);
		}