On 2012-08-17 12:41, Daniel Stone wrote:
Hi,
I've got a MacBookAir4,2 (mid-2011 version with Sandy Bridge), and
get
pretty regular deadlocks in DRM. I'm not 100% sure they all have the
same root cause: the most regular one seems to occur under fairly
heavy I/O pressure, whereas this one just randomly happened whilst
running the Clutter testsuite. The I/O one seems to be pretty easy
to
trigger; if the system is under heavy memory pressure and you do a
lot
of I/O, I can hit a deadlock pretty easily. My usual case for this
is
Chrome running with about a billion tabs open, a large compile just
having finished, and then copying something between my encrypted
/home
and an external USB drive. I haven't got the trace for this handy
but
will try to dig it up out of logs, or get it the next time it
happens.
I've attached the one I just hit running the Clutter test suite
(which
seemed to start from a BUG and go downhill from there), which is also
available at http://hastebin.com/detumihuju.xml
If it helps, I'm running under GNOME Shell.
Any advice/help/fixes welcome, please!
Cheers,
Daniel
This doesn't appear to be stock 3.5-rc7 as I couldn't exactly match up
the BUG_ON to line 2029. Could you tell exactly which BUG_ON you're
hitting? seqno == 0, or !mutex_is_locked() are the two likely
candidates.
--
Ben Widawsky, Intel Open Source Technology Center
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