[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] Fix softlockup issue after vcpu hotplug
On 30/1/07 09:54, "Tian, Kevin" <kevin.tian@xxxxxxxxx> wrote: > If we don't take into account blocked time, maybe we have to disable > softlockup check. Say an idle process gets a timeout value larger than > 10s by next_timer_interrupt, and then blocked. If, unfortunately, there's > no other events happening before that timeout value, this vcpu will see > softlockup warning after that timeout immediately since this period is > not categorized into stolen time. Presumably softlockup threads are killed and re-created when VCPUs are offlined and onlined. Perhaps the re-creation is taking a long time? But 10s would be a *very* long time. And once it is created and bound to the correct VCPU we should never see long timeouts when blocking (since softlockup thread timeout is never longer than a few seconds). Perhaps there is a bug in our cpu onlining code -- a big timeout like that does need investigating. I don't think we can claim this bug is root-caused yet so it's premature to be applying patches. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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