linux-kernel - Re: kswapd high CPU usage with no swap

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Message-ID: <46FA09E8.7010101@gentoo.org>
Date:	Wed, 26 Sep 2007 09:27:36 +0200
From:	Jan Kundrát <jkt@...too.org>
To:	Rik van Riel <riel@...hat.com>
CC:	linux-kernel@...r.kernel.org
Subject: Re: kswapd high CPU usage with no swap

Rik van Riel wrote:
> Could you try out the attached patch, too?

Sorry, I wasn't able to apply it against 2.6.22-gentoo-r3 and vanilla
2.6.22.7; I don't have the "order" member in the "struct scan_control"
and also the bit about "if (sync_writeback == PAGEOUT_IO_SYNC &&
may_enter_fs)" was missing so there was no "else" branch to add (and it
seemd pretty significant to me). What version should I patch against?

When this is sorted out, should I keep the previous patch [1] applied as
well?

[1] http://www.redhat.com/archives/nahant-list/2006-March/msg00033.html

Cheers,
-jkt

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