On Tue, Aug 06, 2013 at 02:02:24PM -0700, Kent Overstreet wrote:

On Tue, Aug 06, 2013 at 01:56:50PM -0700, Darrick J. Wong wrote:

quoted

Ok, I've narrowed it down a little bit --

It's not caused by any of the fixes that went into 3.10.[1-5].  It doesn't seem
to be specific to any particular storage bus, controller, disk, or even cache
set -- the same bcache'd usb stick will crash my laptop and not crash my test
box.  The 4k/512b sector thing was a red herring; you can ignore that.

Ok, that makes more sense...

quoted

The test box is a boring old Core2 box; the laptop is an Ivy Bridge.  I'll try
to enable more verbose PM debugging to see if I can determine what exactly's
going on at sleep time.  (Again, shooting in the dark...)

I just looked at the code and it appears there was a freezer fix that
didn't make it into 3.10 and should have. Can you try the
bcache-for-3.11 branch and see if that fixes it? If so, I'll get that
patch sent out for stable.

Oddly(!), setting CONFIG_INTEL_MEI=n fixed the suspend problem.  I see that mei
and ahci both wound up mapped to irq 47 on the two failing machines, which
makes me suspicious.

I'll try your branch to see if it fixes it too.

--D

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