linux-kernel - Re: [PATCH 7/8] writeback: sync old inodes first in background writeback

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Date:	Thu, 22 Jul 2010 17:02:31 +0800
From:	Wu Fengguang <fengguang.wu@...el.com>
To:	Mel Gorman <mel@....ul.ie>
Cc:	Christoph Hellwig <hch@...radead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Dave Chinner <david@...morbit.com>,
	Chris Mason <chris.mason@...cle.com>,
	Nick Piggin <npiggin@...e.de>, Rik van Riel <riel@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Minchan Kim <minchan.kim@...il.com>
Subject: Re: [PATCH 7/8] writeback: sync old inodes first in background
 writeback

Sorry, please ignore this hack, it's non sense..

> 
> --- linux-next.orig/mm/vmscan.c	2010-07-22 16:36:58.000000000 +0800
> +++ linux-next/mm/vmscan.c	2010-07-22 16:39:57.000000000 +0800
> @@ -1217,7 +1217,8 @@ static unsigned long shrink_inactive_lis
>  			count_vm_events(PGDEACTIVATE, nr_active);
>  
>  			nr_freed += shrink_page_list(&page_list, sc,
> -							PAGEOUT_IO_SYNC);
> +					priority < DEF_PRIORITY / 3 ?
> +					PAGEOUT_IO_SYNC : PAGEOUT_IO_ASYNC);
>  		}
>  
>  		nr_reclaimed += nr_freed;
 
Thanks,
Fengguang

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