On Thu, Nov 14, 2013 at 05:25:29PM -0600, Shawn Bohrer wrote: > In trying to reproduce the cgroup_mutex deadlock I reported earlier > in https://lkml.org/lkml/2013/11/11/574 I believe I encountered a > different issue that I'm also unable to understand. This machine > started out reporting some soft lockups that look to me like they are > on a read_lock(css_set_lock): > ... > RIP: 0010:[<ffffffff8109253c>] [<ffffffff8109253c>] cgroup_attach_task+0xdc/0x7a0 ... > [<ffffffff81092e87>] attach_task_by_pid+0x167/0x1a0 > [<ffffffff81092ef3>] cgroup_tasks_write+0x13/0x20 Most likely the bug fixed by ea84753c98a7 ("cgroup: fix to break the while loop in cgroup_attach_task() correctly"). 3.10.19 contains the backported fix. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
