On Wed, Jun 02, 2010 at 09:13:40PM +0200, Frederic Weisbecker wrote: > On Wed, Jun 02, 2010 at 02:44:59PM -0400, Don Zickus wrote: > > On Tue, Jun 01, 2010 at 04:46:28PM +0200, Jiri Slaby wrote: > > > On 06/01/2010 03:50 PM, Don Zickus wrote: > > > > On Mon, May 31, 2010 at 04:22:00PM +0200, Jiri Slaby wrote: > > > >> Hi, > > > >> > > > >> with -next I get the following errors while trying to hibernate in > > > >> qemu-kvm after the image is stored on disk: > > > > > > > > Is this the host that is hibernating or the guest? > > > > > > Guest. > > > > > > > KVM guests don't emulate the performance counters, so the nmi piece > > > > shouldn't be functioning and the soft lockup piece just sits on top of an > > > > hrtimer, so off the top of my head it is hard to imagine it intefering > > > > with a sata driver. > > > > > > > > I'll need your whole boot up log to see how the lockup detector > > > > initialized itself. > > > > Ok, so I found out what is causing the problem, not entirely sure why or > > what the right fix is, but this patch should do the trick. > > > > This is probably one of those fixing the symptoms but not the problem patch, > > but I don't know enough about suspend/resume to understand what the real > > problem is. > > > So the problem is that we stop the cpu hotplug notifying, I guess this prevents > some ata callbacks to execute in the cpu hotplug notifier and then provoke this > crash. > > The patch looks ok, but I think you should at least print a message in such > case of watchdog failure. Well this is already printed and in Jiri's dmesg output NMI watchdog failed to create perf event on cpu1: ffffffffffffffed I could change it to make it more obvious? Cheers, Don _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
