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

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

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1275642270 -3600
# Node ID 88932ba626fe984ee14cb6a0d6c4629fe765f788
# Parent  99761f54183d04f00e873cd4c16fe8c66b52cb27
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/arch/x86/traps.c |   18 +-----------------
 1 files changed, 1 insertion(+), 17 deletions(-)

diff -r 99761f54183d -r 88932ba626fe xen/arch/x86/traps.c
--- a/xen/arch/x86/traps.c      Fri Jun 04 10:02:51 2010 +0100
+++ b/xen/arch/x86/traps.c      Fri Jun 04 10:04:30 2010 +0100
@@ -1175,10 +1175,7 @@ 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)]);
@@ -1188,19 +1185,6 @@ 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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