From: Michal Hocko <mhocko@kernel.org>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Artem Savkov <asavkov@redhat.com>,
"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: Wed, 30 Aug 2017 17:43:15 +0200 [thread overview]
Message-ID: <20170830154315.sa57wasw64rvnuhe@dhcp22.suse.cz> (raw)
In-Reply-To: <20170830141543.qhipikpog6mkqe5b@dhcp22.suse.cz>
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...
---
next prev parent reply other threads:[~2017-08-30 15:43 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20170807140947.nhfz2gel6wytl6ia@shodan.usersys.redhat.com>
2017-08-16 14:07 ` Thomas Gleixner
2017-08-30 14:15 ` Michal Hocko
2017-08-30 15:43 ` Michal Hocko [this message]
2017-08-31 11:10 ` Artem Savkov
2017-08-31 12:09 ` Michal Hocko
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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