[Xen-changelog] [xen-unstable] [XEN][SHADOW] Use slow method for early-unshadow

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

# HG changeset patch
# User George Dunlap <gdunlap@xxxxxxxxxxxxx>
# Date 1172679229 18000
# Node ID 8ba425b640b3c7f81c17eb45972eff6eabe9f94d
# Parent  7b35a9682d81319553353f767b35d9c98c12ae19
[XEN][SHADOW] Use slow method for early-unshadow

The "fast" method fails a significant portion of the time.
unshadow will still use the "fast" method, but will fall
back to a brute-force method if it fails.

Signed-off-by: George Dunlap <gdunlap@xxxxxxxxxxxxx>
---
 xen/arch/x86/mm/shadow/multi.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -r 7b35a9682d81 -r 8ba425b640b3 xen/arch/x86/mm/shadow/multi.c
--- a/xen/arch/x86/mm/shadow/multi.c    Wed Feb 28 11:11:22 2007 -0500
+++ b/xen/arch/x86/mm/shadow/multi.c    Wed Feb 28 11:13:49 2007 -0500
@@ -2522,7 +2522,7 @@ static inline void check_for_early_unsha
         if ( !(flags & (SHF_L2_32|SHF_L2_PAE|SHF_L2H_PAE|SHF_L4_64)) )
         {
             perfc_incrc(shadow_early_unshadow);
-            sh_remove_shadows(v, gmfn, 1, 0 /* Fast, can fail to unshadow */ );
+            sh_remove_shadows(v, gmfn, 0, 0 /* Slow, can fail to unshadow */ );
         } 
     }
     v->arch.paging.shadow.last_emulated_mfn = mfn_x(gmfn);

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