linux-kernel - Re: [PATCH 3/4] mm, rmap: minimize lock hold when unlink_anon

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Message-ID: <20130807071832.GC32449@lge.com>
Date:	Wed, 7 Aug 2013 16:18:32 +0900
From:	Joonsoo Kim <iamjoonsoo.kim@....com>
To:	Johannes Weiner <hannes@...xchg.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Minchan Kim <minchan@...nel.org>,
	Mel Gorman <mgorman@...e.de>, Rik van Riel <riel@...hat.com>,
	Michel Lespinasse <walken@...gle.com>
Subject: Re: [PATCH 3/4] mm, rmap: minimize lock hold when unlink_anon_vmas

On Wed, Aug 07, 2013 at 02:11:38AM -0400, Johannes Weiner wrote:
> On Tue, Aug 06, 2013 at 05:43:39PM +0900, Joonsoo Kim wrote:
> > Currently, we free the avc objects with holding a lock. To minimize
> > lock hold time, we just move the avc objects to another list
> > with holding a lock. Then, iterate them and free objects without holding
> > a lock. This makes lock hold time minimized.
> > 
> > Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@....com>
> 
> I expect kfree() to be fast enough that we don't think we need to
> bother batching this outside the lock.

Okay!

Thanks.

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