Re: [cgroup/task_lock] INFO: suspicious RCU usage.

2014-02-25 Thread Tejun Heo
Hello, Li. On Tue, Feb 25, 2014 at 08:01:25PM +0800, Li Zefan wrote: ... > >> So, this is from removing task_lock from task_css_set_check() and > >> adding rcu_read_lock() in cpuset_cpus_allowed() should fix it. > > > > Yeah, rcu_read_lock() should be sufficient. > > > >> I'm > >> not sure how m

Re: [cgroup/task_lock] INFO: suspicious RCU usage.

2014-02-25 Thread Li Zefan
>>> [main] Setsockopt(1 2b 80d1000 4) on fd 223 [17:2:768] >>> [ 27.030764] >>> [ 27.031119] === >>> [ 27.031833] [ INFO: suspicious RCU usage. ] >>> [ 27.032536] 3.14.0-rc3-02458-g837caba #2 Not tainted >>> [ 27.033378] --- >>> [

Re: [cgroup/task_lock] INFO: suspicious RCU usage.

2014-02-25 Thread Li Zefan
On 2014/2/21 23:40, Tejun Heo wrote: > Hello, > > On Fri, Feb 21, 2014 at 10:16:22AM +0800, Fengguang Wu wrote: >> commit fb47fea7a59cf3d6387c566084a6684b5005af83 >> Author: Tejun Heo >> AuthorDate: Thu Feb 13 15:16:35 2014 -0500 >> Commit: Tejun Heo >> CommitDate: Thu Feb 13 15:16:35 20

Re: [cgroup/task_lock] INFO: suspicious RCU usage.

2014-02-21 Thread Tejun Heo
Hello, On Fri, Feb 21, 2014 at 10:16:22AM +0800, Fengguang Wu wrote: > commit fb47fea7a59cf3d6387c566084a6684b5005af83 > Author: Tejun Heo > AuthorDate: Thu Feb 13 15:16:35 2014 -0500 > Commit: Tejun Heo > CommitDate: Thu Feb 13 15:16:35 2014 -0500 > > cgroup: drop task_lock() prote