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Message-ID: <20131008220811.GC16625@amt.cnet> Date: Tue, 8 Oct 2013 19:08:11 -0300 From: Marcelo Tosatti <mtosatti@...hat.com> To: Don Zickus <dzickus@...hat.com> Cc: kvm@...r.kernel.org, pbonzini@...hat.com, gleb@...hat.com, linux-kernel@...r.kernel.org Subject: Re: [patch 2/3] pvclock: detect watchdog reset at pvclock read On Tue, Oct 08, 2013 at 09:37:05AM -0400, Don Zickus wrote: > On Mon, Oct 07, 2013 at 10:05:17PM -0300, Marcelo Tosatti wrote: > > Implement reset of kernel watchdogs at pvclock read time. This avoids > > adding special code to every watchdog. > > > > This is possible for watchdogs which measure time based on sched_clock() or > > ktime_get() variants. > > > > Suggested by Don Zickus. > > > > Signed-off-by: Marcelo Tosatti <mtosatti@...hat.com> > > Awesome. Thanks for figuring this out Marcelo. Does that mean we can > revert commit 5d1c0f4a now? :-) Unfortunately no: soft lockup watchdog does not measure time based on sched_clock but on hrtimer interrupt count :-( (see the the softlockup code in question, perhaps you can point to something that i'm missing). BTW, are you OK with printing additional steal time information? https://lkml.org/lkml/2013/6/27/755 > This meets my expectations. I'll leave it to the virt folks to figure out > if this covers all the corner cases or not. > > Cheers, > Don Thanks -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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