From: Stephan von Krawczynski <skraw@ithnet.com>
To: Ed Tomlinson <tomlins@cam.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: new OOM heuristic failure (was: Re: VM: qsbench)
Date: Fri, 02 Nov 2001 04:01:27 +0100 [thread overview]
Message-ID: <200111020301.EAA30696@webserver.ithnet.com> (raw)
In-Reply-To: <20011102023711.EC03D93E4D@oscar.casa.dyndns.org>
> Hi,
>
> shrink_caches can end up lying. shrink_dcache_memory and friends do
not tell
> shrink_caches how many pages they free so nr_pages can be bogus...
Is it worth
> fixing? The simpliest, harmlessly racey and not too pretty, code
follows. It
> would also not be hard to change the shrink_ calls to return the
number of pages
> shrunk, but this would hit more code...
>
> Comments?
I believe the idea of having a more precise nr_pages value can make a
difference. We are trying to estimate if swapping is needed, which is
pretty expensive. If we can avoid it by more accurately knowing what
is really going on (without _too_ much costs) we can only win.
Regards,
Stephan
next prev parent reply other threads:[~2001-11-02 3:02 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-02 2:37 new OOM heuristic failure (was: Re: VM: qsbench) Ed Tomlinson
2001-11-02 3:01 ` Stephan von Krawczynski [this message]
[not found] <200111012108.WAA28044@webserver.ithnet.com>
[not found] ` <3.0.6.32.20011101214957.01feaa70@pop.tiscalinet.it>
2001-11-01 21:59 ` Lorenzo Allegrucci
2001-11-01 23:35 ` Stephan von Krawczynski
2001-11-02 0:37 ` Linus Torvalds
2001-11-02 2:17 ` Stephan von Krawczynski
2001-11-02 2:21 ` Linus Torvalds
2001-11-02 2:30 ` Stephan von Krawczynski
2001-11-02 2:55 ` Stephan von Krawczynski
[not found] <Pine.LNX.3.96.1011031133645.448B-100000@gollum.norang.ca>
2001-10-31 19:46 ` Linus Torvalds
-- strict thread matches above, loose matches on Subject: below --
2001-10-31 12:12 VM: qsbench Lorenzo Allegrucci
2001-10-31 15:00 ` new OOM heuristic failure (was: Re: VM: qsbench) Rik van Riel
2001-10-31 15:52 ` Linus Torvalds
2001-10-31 16:04 ` Rik van Riel
2001-10-31 17:42 ` Stephan von Krawczynski
2001-10-31 18:22 ` Linus Torvalds
2001-10-31 17:55 ` Lorenzo Allegrucci
2001-10-31 18:06 ` Linus Torvalds
2001-10-31 21:31 ` Lorenzo Allegrucci
2001-11-02 13:00 ` Stephan von Krawczynski
2001-11-02 17:36 ` Lorenzo Allegrucci
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