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
