From: Johannes Weiner <hannes@saeurebad.de>
To: Rik van Riel <riel@surriel.com>
Cc: linux-mm@kvack.org
Subject: Re: [RFC][PATCH -mm] vmscan: fix swapout on sequential IO
Date: Wed, 23 Jul 2008 21:38:34 +0200 [thread overview]
Message-ID: <87vdywmlvp.fsf@saeurebad.de> (raw)
In-Reply-To: <20080723152924.752339dd@bree.surriel.com> (Rik van Riel's message of "Wed, 23 Jul 2008 15:29:24 -0400")
Hi,
Rik van Riel <riel@surriel.com> writes:
> On Wed, 23 Jul 2008 20:48:10 +0200
> Johannes Weiner <hannes@saeurebad.de> wrote:
>
>> > - zone->lru[l].nr_scan += scan + 1;
>> > + zone->lru[l].nr_scan += scan + force_scan;
>>
>> The accumulation aspect is not gone, though. If the system has reached
>> the force-scan priority swap_cluster_max times, the next scan, even if
>> long after the last scan, will scan bogus lists.
>
> Which I suspect is the desired behaviour.
>
> Better go out of balance a little, than risk an OOM kill.
Okay, I agree with that. It will at least keep the balance for some
longer :)
Hannes
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next prev parent reply other threads:[~2008-07-23 19:38 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-23 18:41 Rik van Riel, Rik van Riel
2008-07-23 18:48 ` Johannes Weiner
2008-07-23 19:29 ` Rik van Riel
2008-07-23 19:38 ` Johannes Weiner [this message]
2008-07-24 6:26 ` KOSAKI Motohiro
2008-07-24 12:20 ` Rik van Riel
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