From: Christoph Lameter <cl@linux-foundation.org>
To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>,
linux-mm <linux-mm@kvack.org>, Mel Gorman <mel@csn.ul.ie>,
Rik van Riel <riel@redhat.com>,
Minchan Kim <minchan.kim@gmail.com>,
Johannes Weiner <hannes@cmpxchg.org>
Subject: Re: [PATCH v2 1/2] vmscan: don't subtraction of unsined
Date: Tue, 13 Jul 2010 20:50:14 -0500 (CDT) [thread overview]
Message-ID: <alpine.DEB.2.00.1007132047001.14067@router.home> (raw)
In-Reply-To: <20100713182918.EA67.A69D9226@jp.fujitsu.com>
On Tue, 13 Jul 2010, KOSAKI Motohiro wrote:
> Christoph, Can we hear your opinion about to add new branch in slab-free path?
> I think this is ok, because reclaim makes a lot of cache miss then branch
> mistaken is relatively minor penalty. thought?
Its on the slow path so I would think that should be okay. But is this
really necessary? Working with the per zone slab reclaim counters is not
enough? We are adding counter after counter that have similar purposes and
the handling gets more complex.
Maybe we can get rid of the code in the slabs instead by just relying on
the difference of the zone counters?
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next prev parent reply other threads:[~2010-07-14 1:50 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-08 7:38 KOSAKI Motohiro
2010-07-08 7:40 ` [PATCH v2 2/2] vmscan: shrink_slab() require number of lru_pages, not page order KOSAKI Motohiro
2010-07-08 13:23 ` Rik van Riel
2010-07-08 14:04 ` Christoph Lameter
2010-07-08 20:31 ` Andrew Morton
2010-07-08 21:01 ` Christoph Lameter
2010-07-09 0:46 ` KOSAKI Motohiro
2010-07-09 8:21 ` KOSAKI Motohiro
2010-07-09 10:13 ` [PATCH] vmscan: stop meaningless loop iteration when no reclaimable slab KOSAKI Motohiro
2010-07-09 10:53 ` Minchan Kim
2010-07-09 11:04 ` KOSAKI Motohiro
2010-07-11 22:28 ` Minchan Kim
2010-07-13 4:48 ` KOSAKI Motohiro
2010-07-13 6:33 ` Minchan Kim
2010-07-09 14:02 ` Christoph Lameter
2010-07-13 4:59 ` KOSAKI Motohiro
2010-07-09 8:36 ` [PATCH v2 2/2] vmscan: shrink_slab() require number of lru_pages, not page order Minchan Kim
2010-07-09 13:54 ` Christoph Lameter
2010-07-13 5:41 ` KOSAKI Motohiro
2010-07-15 19:15 ` Andrew Morton
2010-07-16 1:39 ` KOSAKI Motohiro
2010-07-16 1:44 ` Minchan Kim
2010-07-08 7:41 ` [PATCH v2 1/2] vmscan: don't subtraction of unsined KOSAKI Motohiro
2010-07-08 14:01 ` Christoph Lameter
2010-07-08 20:00 ` Andrew Morton
2010-07-09 1:16 ` KOSAKI Motohiro
2010-07-09 1:46 ` Minchan Kim
2010-07-09 22:28 ` Andrew Morton
2010-07-13 9:32 ` KOSAKI Motohiro
2010-07-14 1:50 ` Christoph Lameter [this message]
2010-07-14 2:15 ` KOSAKI Motohiro
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