[Bug 1598285] Re: possible deadlock while using the cgroup freezer on a container with NFS-based workload
I've sent an inquiry to the upstream maintainers for assistance. I've also taken a stab at a fix, which I think should prevent the hang, but I'm not sure whether or not it might cause other problems. The patch and test build are here: http://people.canonical.com/~sforshee/lp1598285/ I've currently got a setup running trying to reproduce the bug, once I've confirmed I've reproduced it I can test my fix. ** Changed in: linux (Ubuntu) Status: Incomplete => In Progress ** Changed in: linux (Ubuntu) Assignee: (unassigned) => Seth Forshee (sforshee) -- 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
[Bug 1598285] Re: possible deadlock while using the cgroup freezer on a container with NFS-based workload
** Changed in: linux (Ubuntu) Importance: Undecided => High -- 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
[Bug 1598285] Re: possible deadlock while using the cgroup freezer on a container with NFS-based workload
We have two processes hung, seemingly waiting on i_mutex, pids 20035 and 20036. Pid 20032 is frozen with the following stack trace: [] __refrigerator+0x7a/0x140 [] nfs4_handle_exception+0x118/0x130 [nfsv4] [] nfs4_proc_remove+0x7d/0xf0 [nfsv4] [] nfs_unlink+0x149/0x350 [nfs] [] vfs_unlink+0xf1/0x1a0 [] do_unlinkat+0x279/0x2d0 [] SyS_unlink+0x16/0x20 [] entry_SYSCALL_64_fastpath+0x16/0x71 [] 0x 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
