From: Michal Hocko <mhocko@kernel.org>
To: Artem Savkov <asavkov@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
LKML <linux-kernel@vger.kernel.org>,
Johannes Weiner <hannes@cmpxchg.org>,
linux-mm@kvack.org
Subject: Re: possible circular locking dependency mmap_sem/cpu_hotplug_lock.rw_sem
Date: Thu, 31 Aug 2017 14:09:51 +0200 [thread overview]
Message-ID: <20170831120951.hqlu2ai5i7hly7nk@dhcp22.suse.cz> (raw)
In-Reply-To: <20170831111006.i7srs56xki4bjx34@shodan.usersys.redhat.com>
On Thu 31-08-17 13:10:06, Artem Savkov wrote:
> Hi Michal,
>
> On Wed, Aug 30, 2017 at 05:43:15PM +0200, Michal Hocko wrote:
> > The previous patch is insufficient. drain_all_stock can still race with
> > the memory offline callback and the underlying memcg disappear. So we
> > need to be more careful and pin the css on the memcg. This patch
> > instead...
>
> Tried this on top of rc7 and it does fix the splat for me.
Thanks for testing! Can I assume your Tested-by?
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2017-08-31 12:10 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-07 14:09 possible circular locking dependency mmap_sem/cpu_hotplug_lock.rw_sem Artem Savkov
2017-08-15 19:01 ` Paul E. McKenney
2017-08-16 13:39 ` Laurent Dufour
2017-08-16 15:36 ` Artem Savkov
2017-08-16 15:40 ` Laurent Dufour
2017-08-16 14:07 ` Thomas Gleixner
2017-08-30 14:15 ` Michal Hocko
2017-08-30 15:43 ` Michal Hocko
2017-08-31 11:10 ` Artem Savkov
2017-08-31 12:09 ` Michal Hocko [this message]
2017-08-31 12:19 ` Artem Savkov
2017-09-04 14:03 ` Michal Hocko
2017-09-05 8:19 ` Thomas Gleixner
2017-09-05 10:23 ` Michal Hocko
2017-09-05 11:04 ` Thomas Gleixner
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