From: Marcelo Tosatti <mtosatti@redhat.com>
Date: Thu, 6 Aug 2009 17:39:55 +0000 (-0300)
Subject: KVM: MMU: increase per-vcpu rmap cache alloc size
X-Git-Tag: v2.6.27.32~30
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6bbd18645e02de44d024e738bb1469ef0977f7f6;p=pandora-kernel.git

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>
---

Reading git-diff-tree failed