From: Daniel Phillips <phillips@bonn-fries.net>
To: Marcelo Tosatti <marcelo@conectiva.com.br>,
Rik van Riel <riel@conectiva.com.br>,
"Stephen C. Tweedie" <sct@redhat.com>
Cc: lkml <linux-kernel@vger.kernel.org>, linux-mm@kvack.org
Subject: Re: write drop behind effect on active scanning
Date: Wed, 23 May 2001 16:33:44 +0200 [thread overview]
Message-ID: <0105231633440L.06233@starship> (raw)
In-Reply-To: <Pine.LNX.4.21.0105221910361.864-100000@freak.distro.conectiva>
On Wednesday 23 May 2001 09:33, Marcelo Tosatti wrote:
> Hi,
>
> I just noticed a "bad" effect of write drop behind yesterday during
> some tests.
>
> The problem is that we deactivate written pages, thus making the
> inactive list become pretty big (full of unfreeable pages) under
> write intensive IO workloads.
>
> So what happens is that we don't do _any_ aging on the active list,
> and in the meantime the inactive list (which should have "easily"
> freeable pages) is full of locked pages.
>
> I'm going to fix this one by replacing "deactivate_page(page)" to
> "ClearPageReferenced(page)" in generic_file_write(). This way the
> written pages are aged faster but we avoid the bad effect just
> described.
>
> Any comments on the fix ?
page->age = 0 ?
--
Daniel
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next prev parent reply other threads:[~2001-05-23 14:33 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-05-23 7:33 Marcelo Tosatti
2001-05-23 14:33 ` Daniel Phillips [this message]
2001-05-23 13:25 ` Marcelo Tosatti
2001-05-23 15:30 ` Mark Hahn
2001-05-23 14:59 ` Marcelo Tosatti
2001-05-23 15:39 ` Rik van Riel
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