linux-kernel - Re: [PATCH v3 05/10] vmscan: make isolate_lru

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Message-ID: <20110609150200.GD4878@barrios-laptop>
Date:	Fri, 10 Jun 2011 00:02:00 +0900
From:	Minchan Kim <minchan.kim@...il.com>
To:	Mel Gorman <mgorman@...e.de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-mm <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Rik van Riel <riel@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: [PATCH v3 05/10] vmscan: make isolate_lru_page with filter
 aware

On Thu, Jun 09, 2011 at 03:04:53PM +0100, Mel Gorman wrote:
> On Tue, Jun 07, 2011 at 11:38:18PM +0900, Minchan Kim wrote:
> > In __zone_reclaim case, we don't want to shrink mapped page.
> > Nonetheless, we have isolated mapped page and re-add it into
> > LRU's head. It's unnecessary CPU overhead and makes LRU churning.
> > 
> 
> Gack, I should have keep reading. I didn't cop from the subject that

I should have used clear subject.

> __zone_reclaim would be updated. Still, it would have been easier to
> review if one patch introduced ISOLATE_CLEAN and updated the callers and
> this patch introduced ISOLATE_UNMAPPED and updated the relevant callers.

Agree. I will fix in later version.

> 
> > <SNIP>
> 
> -- 
> Mel Gorman
> SUSE Labs

-- 
Kind regards
Minchan Kim
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