Messages in this thread | | | Date | Fri, 23 Apr 2010 21:27:39 -0700 | From | "Paul E. McKenney" <> | Subject | Re: [BUGFIX][PATCH] memcg rcu lock fix v3 |
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On Sat, Apr 24, 2010 at 11:08:05AM +0900, KAMEZAWA Hiroyuki wrote: > On Fri, 23 Apr 2010 12:34:06 -0700 > "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> wrote: > > > On Fri, Apr 23, 2010 at 01:03:49PM +0900, KAMEZAWA Hiroyuki wrote: > > > On Fri, 23 Apr 2010 12:58:14 +0900 > > > KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> wrote: > > > > > > > On Fri, 23 Apr 2010 11:55:16 +0800 > > > > Li Zefan <lizf@cn.fujitsu.com> wrote: > > > > > > > > > Li Zefan wrote: > > > > > > KAMEZAWA Hiroyuki wrote: > > > > > >> On Fri, 23 Apr 2010 11:00:41 +0800 > > > > > >> Li Zefan <lizf@cn.fujitsu.com> wrote: > > > > > >> > > > > > >>> with CONFIG_PROVE_RCU=y, I saw this warning, it's because > > > > > >>> css_id() is not under rcu_read_lock(). > > > > > >>> > > > > > >> Ok. Thank you for reporting. > > > > > >> This is ok ? > > > > > > > > > > > > Yes, and I did some more simple tests on memcg, no more warning > > > > > > showed up. > > > > > > > > > > > > > > > > oops, after trigging oom, I saw 2 more warnings: > > > > > > > > > > > > > Thank you for good testing. > > > v3 here...sorry too rapid posting... > > > > > > == > > > From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> > > > > I have queued this, thank you all! > > > > However, memcg_oom_wake_function() does not yet exist in the tree > > I am using, and is_target_pte_for_mc() has changed. I omitted the > > hunk for memcg_oom_wake_function() and edited the hunk for > > is_target_pte_for_mc(). > > > Ok, memcg_oom_wake_function is for -mm. I'll prepare another patch for -mm. > > > > I have queued this for others' testing, but if you would rather carry > > this patch up the memcg path, please let me know and I will drop it. > > > I think it's ok to be fixed by your tree. I'll look at memcg later and > fix remaining things.
Sounds good!
Thanx, Paul
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