[Xen-changelog] [xen-4.0-testing] x86: Suppress warnings about spurious pagefaults

["Xen patchbot-4.0-testing" <patchbot-4.0-testing@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1275645001 -3600
# Node ID 96e0b0506051015770e946ad911a6d3ed12888ab
# Parent  d68b0e4c378bf45015405aa053e8b07e786c46f7
x86: Suppress warnings about spurious pagefaults

RHEL4 guests take a fair number of spurious pagefaults on Nehalem; no
need to report each one of them at XENLOG_WARNING.

Signed-off-by: Tim Deegan <Tim.Deegan@xxxxxxxxxx>
xen-unstable changeset:   21514:88932ba626fe
xen-unstable date:        Fri Jun 04 10:04:30 2010 +0100
---
 xen/arch/x86/traps.c |   18 +-----------------
 1 files changed, 1 insertion(+), 17 deletions(-)

diff -r d68b0e4c378b -r 96e0b0506051 xen/arch/x86/traps.c
--- a/xen/arch/x86/traps.c      Fri Jun 04 10:49:43 2010 +0100
+++ b/xen/arch/x86/traps.c      Fri Jun 04 10:50:01 2010 +0100
@@ -1169,10 +1169,7 @@ static int __spurious_page_fault(
          (l2e_get_flags(l2e) & disallowed_flags) )
         return 0;
     if ( l2e_get_flags(l2e) & _PAGE_PSE )
-    {
-        l1e = l1e_empty(); /* define before use in debug tracing */
-        goto spurious;
-    }
+        return 1;
 
     l1t = map_domain_page(mfn);
     l1e = l1e_read_atomic(&l1t[l1_table_offset(addr)]);
@@ -1182,19 +1179,6 @@ static int __spurious_page_fault(
          (l1e_get_flags(l1e) & disallowed_flags) )
         return 0;
 
- spurious:
-    dprintk(XENLOG_WARNING, "Spurious fault in domain %u:%u "
-            "at addr %lx, e/c %04x\n",
-            current->domain->domain_id, current->vcpu_id,
-            addr, error_code);
-#if CONFIG_PAGING_LEVELS >= 4
-    dprintk(XENLOG_WARNING, " l4e = %"PRIpte"\n", l4e_get_intpte(l4e));
-#endif
-#if CONFIG_PAGING_LEVELS >= 3
-    dprintk(XENLOG_WARNING, " l3e = %"PRIpte"\n", l3e_get_intpte(l3e));
-#endif
-    dprintk(XENLOG_WARNING, " l2e = %"PRIpte"\n", l2e_get_intpte(l2e));
-    dprintk(XENLOG_WARNING, " l1e = %"PRIpte"\n", l1e_get_intpte(l1e));
     return 1;
 }
 

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