So, I think the issue occurs because of the pte_lockptr lock being used on a PMD and is incontention with the lock on the same PMD. There are several possible points where this can happen, for example, pages being migrated on NUMA systems (unlikely in most of these bug reports) or even mremap() being used remap a mapped region to a new location. It may be because a page fault occurs on a page that is being migrated or being remapped while it is being accessed and it's swapped out; the latter case may introduce a lot of latency if there are lots of pending I/Os during the swap.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1674838 Title: kernel BUG at /build/linux- 7LGLH_/linux-4.10.0/include/linux/swapops.h:129 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1674838/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
