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 <[EMAIL PROTECTED]>
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 79cb4a9..2477a24 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -316,7 +316,7 @@ 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);
--
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