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>
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index cd7e697..757f6b0 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -235,7 +235,7 @@
int nr;
do {
nr = shrink_slab(1000, GFP_KERNEL, 1000);
- if (page_count(p) == 0)
+ if (page_count(p) == 1)
break;
} while (nr > 10);
}