tree 036f03910d6ee4edb46d12df751eeb7e6db2e671
parent 3ad4f597058301c97f362e500a32f63f5c950a45
author Marcelo Tosatti <mtosatti@redhat.com> 1225225018 -0200
committer Avi Kivity <avi@redhat.com> 1226429614 +0200

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>