mm: __tlb_remove_page() check the correct batch
authorShaohua Li <shaohua.li@intel.com>
Fri, 8 Jul 2011 22:39:41 +0000 (15:39 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Sat, 9 Jul 2011 04:14:43 +0000 (21:14 -0700)
__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>
mm/memory.c

index 40b7531ee8badb288823b64715265d0f16be397d..9b8a01d941cbc77dc0b1674fd817b54bb4f281f4 100644 (file)
@@ -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);