On Fri, 2015-11-20 at 13:56 +0100, Laurent Dufour wrote: > On 20/11/2015 13:10, Michael Ellerman wrote: > > On Thu, 2015-11-19 at 00:23 -0800, Christoph Hellwig wrote: > > > > > It's pretty much guaranteed a block layer bug, most likely in the > > > merge bios to request infrastucture where we don't obey the merging > > > limits properly. > > > > > > Does either of you have a known good and first known bad kernel? > > > > Not me, I've only hit it one or two times. All I can say is I have hit it in > > 4.4-rc1. > > > > Laurent, can you narrow it down at all? > > I'm trying bisect it but it's very time consuming, and I think I missed > some bad kernel because I didn't let enough time to the system to panic. > > But I'm still on... > I usually hit it at boot time. Maybe one out of five times. I'll take a stab at bisecting today...
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