Commit 9903a927 authored Jan 08, 2009 by Marcelo Tosatti Committed by Avi Kivity Mar 24, 2009

KVM: MMU: drop zeroing on mmu_memory_cache_alloc



Zeroing on mmu_memory_cache_alloc is unnecessary since:

- Smaller areas are pre-allocated with kmem_cache_zalloc.
- Page pointed by ->spt is overwritten with prefetch_page
  and entries in page pointed by ->gfns are initialized
  before reading.

[avi: zeroing pages is unnecessary]

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

parent ff81ff10

arch/x86/kvm/mmu.c

+0 −1

Original line number	Diff line number	Diff line
		@@ -352,7 +352,6 @@ static void mmu_memory_cache_alloc(struct kvm_mmu_memory_cache mc,

		BUG_ON(!mc->nobjs);
		p = mc->objects[--mc->nobjs];
		memset(p, 0, size);
		return p;
		}

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