I have done some extensive research on this and I am able to confirm that while Bug #1864864 does solve a class of issues, it does not solve the one affecting Open vSwitch, as it does rely on PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP:
https://github.com/openvswitch/ovs/blob/0de1b425962db073ebbaa3ddbde445580afda840/lib /ovs-thread.c#L247-L248 And when running the reproducer here: https://sourceware.org/bugzilla/show_bug.cgi?id=23861 By doing the following: ``` curl https://sourceware.org/bugzilla/attachment.cgi?id=11382 -o bug23861.c sed -i 's/do_exit = 0/do_exit(0)/' bug23861.c g++ bug23861.c -lpthread -o bug23861 for ((x=1;x<100;x++)) ; do echo $x;date;./bug23861 --prefer-writer-nonrecursive;done ``` I will add that in my initial tests of doing this inside a small VM with a Docker container, it did not hang after running for 10-15 minutes, but it immediately hung on a much more powerful machine. I will file a bug to try and get the patch above SRU'd into glibc as well and hopefully that will be the end of it. ** Bug watch added: Sourceware.org Bugzilla #23861 https://sourceware.org/bugzilla/show_bug.cgi?id=23861 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1839592 Title: Open vSwitch (Version 2.9.2) goes into deadlocked state To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1839592/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
