Messages in this thread | | | Date | Wed, 21 Jan 2015 14:39:42 +1100 | From | Anton Blanchard <> | Subject | Re: Confusing behaviour with /proc/sys/kernel/nmi_watchdog |
| |
Hi Andrew,
> On Wed, Nov 05, 2014 at 09:34:20AM +1100, Anton Blanchard wrote: > > commit 9919e39a1738 ("kvm: ensure hard lockup detection is disabled > > by default") provided a way for the kernel to disable the hard > > lockup detector at runtime. > > > > I'm using it on ppc64 but notice some weird behaviour with the > > nmi_watchdog procfs variable. At boot, that the hard lockup > > detector appears to be enabled even when we disable it via > > watchdog_enable_hardlockup_detector(false): > > > > # cat /proc/sys/kernel/nmi_watchdog > > 1 > > > > I have to echo 0 to it then echo 1 again to enable it. > > > > Anton > > Hi Anton, > > Yes, the nmi watchdog proc variables are currently a bit > confusing. Uli has posted a series to clear all that up > though. Please see > > https://lkml.org/lkml/2014/10/17/340
Any progress on this? I'm rebasing our hardware NMI patch for ppc64 and notice the strange behaviour is still in mainline.
Anton
| |