On Wed, 5 Nov 2014, Norbert Preining wrote: > Dear all, > > (please Cc) > > since 3.18-rc started, regularly, but unpredictably, firefox > (Debian iceweasel) goes completely boom to 100% CPU, and there > is also a kernel task khugepaged doing the same. > > I need to kill firefox, or better the X session to get it back to normal. > > THe logs don't show any strange output > > top's top process: > > 27021 norbert 20 0 1351536 449868 88788 R 100.4 5.6 4:46.16 iceweasel > > 35 root 39 19 0 0 0 R 100.0 0.0 2:41.10 > khugepaged > > Switching back to 3.17 does Not* exhibit the same behaviour. > > Is this a bug in Firefox/Iceweasel, or is there something luring in the > kernel. >
If you have the ability to kill your X session, then you presumably are able to capture /proc/pid/stack for these pids to see where it is busy. It might also be helpful to see how the grep ^thp_ /proc/vmstat and grep ^compact_ /proc/vmstat counters change over time. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
