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From: Michal Hocko <mhocko@kernel.org>
To: <linux-mm@kvack.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Johannes Weiner <hannes@cmpxchg.org>, Mel Gorman <mgorman@suse.de>,
        Tejun Heo <tj@kernel.org>, LKML <linux-kernel@vger.kernel.org>
Subject: [RFC 0/2] do not depend on cpuhotplug logs in lru_add_drain_all 
Date: Thu,  2 Nov 2017 10:36:11 +0100
Message-Id: <20171102093613.3616-1-mhocko@kernel.org>
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Hi,
this is an RFC to drop get_online_cpus from lru_add_drain_all ad this
has caused a very subtle lockdep splats recently [1]. I didn't get even
to properly test this yet and I am sending it early to check whether the
thinking behind is sound. I am basically following the same pattern we
have used for removing get_online_cpus from drain_all_pages which should
be the similar case.

Does anybody see any obvious problem?

[1] http://lkml.kernel.org/r/089e0825eec8955c1f055c83d476@google.com

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From: Michal Hocko <mhocko@kernel.org>
Subject: [RFC 0/2] do not depend on cpuhotplug logs in lru_add_drain_all 
Date: Thu,  2 Nov 2017 10:36:11 +0100
Message-Id: <20171102093613.3616-1-mhocko@kernel.org>
Sender: owner-linux-mm@kvack.org
List-ID: <linux-mm.kvack.org>
To: linux-mm@kvack.org
Cc: Peter Zijlstra <peterz@infradead.org>, Thomas Gleixner <tglx@linutronix.de>, Johannes Weiner <hannes@cmpxchg.org>, Mel Gorman <mgorman@suse.de>, Tejun Heo <tj@kernel.org>, LKML <linux-kernel@vger.kernel.org>

Hi,
this is an RFC to drop get_online_cpus from lru_add_drain_all ad this
has caused a very subtle lockdep splats recently [1]. I didn't get even
to properly test this yet and I am sending it early to check whether the
thinking behind is sound. I am basically following the same pattern we
have used for removing get_online_cpus from drain_all_pages which should
be the similar case.

Does anybody see any obvious problem?

[1] http://lkml.kernel.org/r/089e0825eec8955c1f055c83d476@google.com

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