With a reliable steal time mechanism, we can tell if we're out of the cpu for very long, differentiating from the case that we simply got a real softlockup. In the case we were out of cpu, the watchdog is fed, making bogus softlockups disappear. Signed-off-by: Glauber Costa <glommer@xxxxxxxxxx> --- arch/x86/kernel/kvmclock.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/arch/x86/kernel/kvmclock.c b/arch/x86/kernel/kvmclock.c index a1f4852..1c496c8 100644 --- a/arch/x86/kernel/kvmclock.c +++ b/arch/x86/kernel/kvmclock.c @@ -104,6 +104,9 @@ cputime_t kvm_get_steal_time(void) delta = this_steal_info - *last_steal_info; + if (delta > 1000UL) + touch_softlockup_watchdog(); + *last_steal_info = this_steal_info; put_cpu_var(steal_info); -- 1.6.2.2 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
