We have two processes hung, seemingly waiting on i_mutex, pids 20035 and 20036. Pid 20032 is frozen with the following stack trace:
[<ffffffff810e9cfa>] __refrigerator+0x7a/0x140 [<ffffffffc08e80b8>] nfs4_handle_exception+0x118/0x130 [nfsv4] [<ffffffffc08e9efd>] nfs4_proc_remove+0x7d/0xf0 [nfsv4] [<ffffffffc088a329>] nfs_unlink+0x149/0x350 [nfs] [<ffffffff81219bd1>] vfs_unlink+0xf1/0x1a0 [<ffffffff8121d159>] do_unlinkat+0x279/0x2d0 [<ffffffff8121dc16>] SyS_unlink+0x16/0x20 [<ffffffff81825bf2>] entry_SYSCALL_64_fastpath+0x16/0x71 [<ffffffffffffffff>] 0xffffffffffffffff which is suspicious. All three processes are from iozone. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1598285 Title: possible deadlock while using the cgroup freezer on a container with NFS-based workload To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1598285/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
