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KVM: MMU: drop zeroing on mmu_memory_cache_alloc

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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>
This commit is contained in:
Marcelo Tosatti 2009-01-08 17:44:19 -02:00 committed by Avi Kivity
parent ff81ff10b4
commit 9903a927a4
1 changed files with 0 additions and 1 deletions
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arch/x86/kvm/mmu.c
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@ -352,7 +352,6 @@ static void *mmu_memory_cache_alloc(struct kvm_mmu_memory_cache *mc,
BUG_ON(!mc->nobjs); BUG_ON(!mc->nobjs);
p = mc->objects[--mc->nobjs]; p = mc->objects[--mc->nobjs];
memset(p, 0, size);
return p; return p;
} }