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 much of task_lock() locking we currently have in cpuset > >> is actually necessary tho. Shouldn't we be able to do most with just > >> callback_mutex, if not cpuset_mutex? Li, any ideas? > >> > > > > task_lock() is also used to protect task->mems_allowed. I'll see if we > > can get rid of most (if not all) task_lock() lockings in cpuset. > > > > After a quick lock, I think except the one in cpuset_change_task_nodemask(), > all > other task_lock() lockings can be replace by rcu_readlock().
I committed the original series as-is. Can you please post follow-up patches to update cpuset locking? Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
