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

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Message-ID: <20070926112510.314e8775@cuia.boston.redhat.com>
Date:	Wed, 26 Sep 2007 11:25:10 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Jan Kundrát <jkt@...too.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: kswapd high CPU usage with no swap

On Wed, 26 Sep 2007 09:27:36 +0200
Jan Kundrát <jkt@...too.org> wrote:

> 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?

Sorry, the patch is against 2.6.23-rc7.

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

That doesn't hurt.

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