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authorMarcelo Tosatti <mtosatti@redhat.com>2009-08-06 14:39:55 -0300
committerGreg Kroah-Hartman <gregkh@suse.de>2009-09-08 20:17:14 -0700
commit6bbd18645e02de44d024e738bb1469ef0977f7f6 (patch)
treec6c5495c9cdbbedc53e00704ea17bdc46572c118
parent12daed95faec51a60736776a35ce4b0d1541c346 (diff)
KVM: MMU: increase per-vcpu rmap cache alloc size
(cherry picked from commit c41ef344de212bd918f7765af21b5008628c03e0) 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> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--arch/x86/kvm/mmu.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 19b0d691886e..0376c8e7b7d4 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -298,7 +298,7 @@ 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);