Commit 9903a927 authored by Marcelo Tosatti's avatar Marcelo Tosatti Committed by Avi Kivity
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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: default avatarMarcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: default avatarAvi 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;

}