Hi Vlastimil thanks for your answer.
In the meantime I have tried rc3, too, with the same effects. Interestingly, once it goes into a bad state, every future approach does the same. I started shotwell (photo organizer) and it went into the same state (khugepaged / shotwell each using about 100% of CPu time). On Thu, 06 Nov 2014, Vlastimil Babka wrote: > Could be that another task holds the mmap_sem during THP allocation attempt on > its own page fault, and compaction goes in some kind of infinite loop. There > are My feeling somehow is about the plugin-container in firefox ... (flashplayer or something similar, but I might be wrong!). With shotwell, I have no idea why. > I suggested testing a commit revert in one thread, and a possible fix in the > other. If you can reproduce this well, that would be very useful. Which commit are you talking about? I can easily revert some/all of what you want and do test runs. > khugepaged using CPU also points to either the address space scanning, or > compaction going wrong. Since 8b1645685ac it shouldn't hold mmap_sem during > compaction, but that still leaves page faulters to possibly hold it. So, do you mean I should try reverting 8b1645685ac? > So yeah we would need the stacks of processes that do hog the CPU's, not those > that sleep. As David suggested, a /proc/pid/stack could work. Also can you > please provide /proc/zoneinfo ? Again, as I mentioned, I don't have /proc/pid/stack for any "pid", is this depending on some specific kerenl option? /proc/zoneinfo I have and can send you the next time. Thanks a lot and all the best Norbert ------------------------------------------------------------------------ PREINING, Norbert http://www.preining.info JAIST, Japan TeX Live & Debian Developer GPG: 0x860CDC13 fp: F7D8 A928 26E3 16A1 9FA0 ACF0 6CAC A448 860C DC13 ------------------------------------------------------------------------ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
