[Xen-changelog] [xen-3.2-testing] x86 hvm: Warn only once per time source when the periodic tiemout is

["Xen patchbot-3.2-testing" <patchbot-3.2-testing@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1210688102 -3600
# Node ID 9bb37012b63e58890d4b8eab956dc2722ddb433d
# Parent  1f673d541aad6bdddff72cae57fc89210e089089
x86 hvm: Warn only once per time source when the periodic tiemout is
set 'too small'.
Signed-off-by: Keir Fraser <keir.fraser@xxxxxxxxxx>
xen-unstable changeset:   17579:cc953475ab149a61defff06de237295a7feb882d
xen-unstable date:        Tue May 06 16:20:54 2008 +0100
---
 xen/arch/x86/hvm/vpt.c        |    6 +++---
 xen/include/asm-x86/hvm/vpt.h |    1 +
 2 files changed, 4 insertions(+), 3 deletions(-)

diff -r 1f673d541aad -r 9bb37012b63e xen/arch/x86/hvm/vpt.c
--- a/xen/arch/x86/hvm/vpt.c    Tue May 13 15:14:34 2008 +0100
+++ b/xen/arch/x86/hvm/vpt.c    Tue May 13 15:15:02 2008 +0100
@@ -338,9 +338,9 @@ void create_periodic_time(
     /* Periodic timer must be at least 0.9ms. */
     if ( (period < 900000) && !one_shot )
     {
-        gdprintk(XENLOG_WARNING,
-                 "HVM_PlatformTime: program too small period %"PRIu64"\n",
-                 period);
+        if ( !test_and_set_bool(pt->warned_timeout_too_short) )
+            gdprintk(XENLOG_WARNING, "HVM_PlatformTime: program too "
+                     "small period %"PRIu64"\n", period);
         period = 900000;
     }
 
diff -r 1f673d541aad -r 9bb37012b63e xen/include/asm-x86/hvm/vpt.h
--- a/xen/include/asm-x86/hvm/vpt.h     Tue May 13 15:14:34 2008 +0100
+++ b/xen/include/asm-x86/hvm/vpt.h     Tue May 13 15:15:02 2008 +0100
@@ -78,6 +78,7 @@ struct periodic_time {
     bool_t one_shot;
     bool_t do_not_freeze;
     bool_t irq_issued;
+    bool_t warned_timeout_too_short;
 #define PTSRC_isa    1 /* ISA time source */
 #define PTSRC_lapic  2 /* LAPIC time source */
     u8 source;                  /* PTSRC_ */

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