On Sat, Sep 11, 2010 at 11:12, Jon Masters <jcm@xxxxxxxxxx> wrote: > On Sat, 2010-09-11 at 11:40 -0500, Mike McGrath wrote: >> On Sat, 11 Sep 2010, Jon Masters wrote: > >> > > The code in block/blk-core:338 contains an explicit check to ensure that >> > > interrupts have been disabled, but this not true since blkif_interrupt >> > > is not registered with IRQF_DISABLED set at the time of the setup in >> > > bind_evtchn_to_irqhandler. Thus it might be that interrupts are still on >> > > when we get to kick_pending_request_queues. Does this always happen? >> > > >> > > This perhaps happened because upstream removed IRQF_DISABLED and now >> > > runs with interrupts disabled in handle_IRQ_event, so Xen won't see >> > > this. But on 2.6.32 this change had not yet happened. It's also 2:50am >> > > and I might be reading this wrong, but I at least suggest you open a >> > > RHEL6 bug and try a more recent kernel build. > >> > Ah, of course I shouldn't email before bed. There's an obvious giant >> > spin_lock_irqsave/restore there, but as noted on xen-devel (when they >> > were mulling over moving all of the blkif_interrupt bits into a tasklet >> > jut a couple of weeks ago): "It looks like __blk_end_request_all...is >> > returning with interrupts enabled sometimes". I pinged some folks. > >> Just so everyone else knows, I've set kernel.panic to 10 on these hosts so >> at least they'll reboot when they panic. Hopefully we can avoid a few >> wake-and-reboot issues like we had last night :-/ > > I pinged some folks about it last night. I would hope there will be a > fix for that soon. I suspect it's reproducible on the 70+ kernels, but > can you check that for us and update the BZ? > I have fas3 on a .71 kernel. Since they seem to occur at the same time I have kept the others at older versions to see if it fixes or misses. fas02 will reboot into a .71 if it needs to. I haven't done anything to fas01 to keep it prime test grounds. -- Stephen J Smoogen. “The core skill of innovators is error recovery, not failure avoidance.” Randy Nelson, President of Pixar University. "We have a strategic plan. It's called doing things."" — Herb Kelleher, founder Southwest Airlines _______________________________________________ infrastructure mailing list infrastructure@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/infrastructure
