On Tue, Sep 3, 2013 at 9:49 AM, Manfred Spraul <manfred@xxxxxxxxxxxxxxxx> wrote: > Hi Vineet, > > > On 09/03/2013 09:34 AM, Vineet Gupta wrote: > > However assuming we are going ahead with debugging this - can you please > confirm whether you see the issue on x86 as well as I have not tested that ? > I vaguely remember one of your earlier posts suggested you did Thx, -Vineet > > I'm unable to reproduce the issue so far. I ran > - something like 4000 stock msgctl08 with 4 cores on x86. > - a few runs with modified msgctl08 with either slowed down reader or slowed > down writer threads. (i.e.: force queue full or queue empty waits). > - a few runs (modified&unmodified) with all but one core taken offline. > Cool. Manfred, can you offer your modified test-cases, please? Thanks in advance. - Sedat - > I have not yet tested with PREEMPT enabled. > > A few more ideas: > - what is the output of ipcs -q? Are the queues empty or full? > - what is the output of then WCHAN field with ps when it hangs? > Something like > #ps -o pid,f,stat,pcpu,pmem,psr,wchan=WIDE-WCHAN -o comm,args > > -- > Manfred -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>