Commit c41ef344 authored Oct 28, 2008 by Marcelo Tosatti Committed by Avi Kivity Nov 11, 2008

KVM: MMU: increase per-vcpu rmap cache alloc size



The page fault path can use two rmap_desc structures, if:

- walk_addr's dirty pte update allocates one rmap_desc.
- mmu_lock is dropped, sptes are zapped resulting in rmap_desc being
freed.
- fetch->mmu_set_spte allocates another rmap_desc.

Increase to 4 for safety.

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

parent 3ad4f597

arch/x86/kvm/mmu.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -314,7 +314,7 @@ static int mmu_topup_memory_caches(struct kvm_vcpu *vcpu)
		if (r)
		goto out;
		r = mmu_topup_memory_cache(&vcpu->arch.mmu_rmap_desc_cache,
		rmap_desc_cache, 1);
		rmap_desc_cache, 4);
		if (r)
		goto out;
		r = mmu_topup_memory_cache_page(&vcpu->arch.mmu_page_cache, 8);

Admin message