linux-kernel - Re: [PATCH v2] mm: make lru_add_drain

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Message-ID: <20130807204527.GB28039@mtj.dyndns.org>
Date:	Wed, 7 Aug 2013 16:45:27 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Chris Metcalf <cmetcalf@...era.com>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [PATCH v2] mm: make lru_add_drain_all() selective

On Tue, Aug 06, 2013 at 04:22:39PM -0400, Chris Metcalf wrote:
> This change makes lru_add_drain_all() only selectively interrupt
> the cpus that have per-cpu free pages that can be drained.
> 
> This is important in nohz mode where calling mlockall(), for
> example, otherwise will interrupt every core unnecessarily.

Can you please split off workqueue part into a separate patch with
proper description?  I don't mind the change eventually going through
-mm but it's nasty to bury workqueue API update with another change
without explanation or justification.

Thanks.

-- 
tejun
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