[RFC,v2,6/7] touch softlockup watchdog

Commit Message

Glauber Costa Aug. 30, 2010, 5:06 p.m. UTC

None

Patch

diff --git a/arch/x86/kernel/kvmclock.c b/arch/x86/kernel/kvmclock.c
index a1f4852..d217475 100644
--- a/arch/x86/kernel/kvmclock.c
+++ b/arch/x86/kernel/kvmclock.c
@@ -91,6 +91,7 @@  cputime_t kvm_get_steal_time(void)
 {
 	u64 delta = 0;
 	u64 *last_steal_info, this_steal_info;
+	int touch_wd;
 	struct pvclock_vcpu_time_info *src;
 
 	src = &get_cpu_var(hv_clock);
@@ -104,6 +105,10 @@  cputime_t kvm_get_steal_time(void)
 
 	delta = this_steal_info - *last_steal_info;
 
+	touch_wd = softlockup_thresh * 1000UL;
+	if ((touch_wd > 0) && (delta > touch_wd))
+		touch_softlockup_watchdog();
+
 	*last_steal_info = this_steal_info;
 	put_cpu_var(steal_info);