Commit 0b43c3aa authored Jul 08, 2011 by Shaohua Li Committed by Linus Torvalds Jul 08, 2011

mm: __tlb_remove_page() check the correct batch



__tlb_remove_page() switches to a new batch page, but still checks space
in the old batch.  This check always fails, and causes a forced tlb flush.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 215ddd66

mm/memory.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -305,6 +305,7 @@ int __tlb_remove_page(struct mmu_gather tlb, struct page page)
		if (batch->nr == batch->max) {
		if (!tlb_next_batch(tlb))
		return 0;
		batch = tlb->active;
		}
		VM_BUG_ON(batch->nr > batch->max);