[Xen-changelog] [xen-unstable] x86 shadow: Audit tables and guest walk when we know they are consistent.

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1204206030 0
# Node ID 15c3c136206d89c4f33ba09d956d798d6fa17126
# Parent  0e22182446fae20e022a9c28a6ac6cda6cae4790
x86 shadow: Audit tables and guest walk when we know they are consistent.
From: Gianluca Guida <gianluca.guida@xxxxxxxxxxxxx>
Signed-off-by: Keir Fraser <keir.fraser@xxxxxxxxxx>
---
 xen/arch/x86/mm/shadow/multi.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff -r 0e22182446fa -r 15c3c136206d xen/arch/x86/mm/shadow/multi.c
--- a/xen/arch/x86/mm/shadow/multi.c    Thu Feb 28 13:21:49 2008 +0000
+++ b/xen/arch/x86/mm/shadow/multi.c    Thu Feb 28 13:40:30 2008 +0000
@@ -2952,8 +2952,6 @@ static int sh_page_fault(struct vcpu *v,
 #endif /* (SHADOW_OPTIMIZATIONS & SHOPT_VIRTUAL_TLB) */
 
     shadow_lock(d);
-    shadow_audit_tables(v);
-    sh_audit_gw(v, &gw);
 
     if ( gw_remove_write_accesses(v, va, &gw) )
     {
@@ -2971,6 +2969,9 @@ static int sh_page_fault(struct vcpu *v,
         shadow_unlock(d);
         return EXCRET_fault_fixed;
     }
+
+    shadow_audit_tables(v);
+    sh_audit_gw(v, &gw);
 
     /* Make sure there is enough free shadow memory to build a chain of
      * shadow tables. (We never allocate a top-level shadow on this path,

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