Re: [Xen-devel] cpuidle causing Dom0 soft lockups

["Jan Beulich" <JBeulich@xxxxxxxxxx>]

>>> Keir Fraser <keir.fraser@xxxxxxxxxxxxx> 15.02.10 18:33 >>>
>--- a/xen/common/sched_credit.c        Mon Feb 15 08:19:07 2010 +0000
>+++ b/xen/common/sched_credit.c        Mon Feb 15 17:25:29 2010 +0000
>@@ -1060,6 +1060,7 @@
>                 /* We got a candidate. Grab it! */
>                 CSCHED_VCPU_STAT_CRANK(speer, migrate_q);
>                 CSCHED_STAT_CRANK(migrate_queued);
>+                ASSERT(!vc->is_urgent);
>                 __runq_remove(speer);
>                 vc->processor = cpu;
>                 return speer;

By what is this assertion motivated? I.e. why shouldn't an urgent vCPU
be getting here? We're seeing this (BUG_ON() in the checked in version)
trigger...

Jan


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