linux-kernel - Re: [PATCH] vmscan: limit concurrent reclaimers in shrink

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Message-ID: <4B2235F0.4080606@redhat.com>
Date:	Fri, 11 Dec 2009 07:07:12 -0500
From:	Larry Woodman <lwoodman@...hat.com>
To:	Minchan Kim <minchan.kim@...il.com>
CC:	Rik van Riel <riel@...hat.com>, kosaki.motohiro@...fujitsu.com,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, aarcange@...hat.com
Subject: Re: [PATCH] vmscan: limit concurrent reclaimers in shrink_zone

Minchan Kim wrote:
>
> I like this. but why do you select default value as constant 8?
> Do you have any reason?
>
> I think it would be better to select the number proportional to NR_CPU.
> ex) NR_CPU * 2 or something.
>
> Otherwise looks good to me.
>
> Reviewed-by: Minchan Kim <minchan.kim@...il.com>
>
>   
This is a per-zone count so perhaps a reasonable default is the number 
of CPUs on the
NUMA node that the zone resides on ?

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