From: Alastair Stevens <alastair@altruxsolutions.co.uk>
Organization: Haverhill UK
To: linux-kernel@vger.kernel.org
Subject: 2.6.9-ck1: swap mayhem under UT2004
Date: Fri, 22 Oct 2004 23:46:28 +0100
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Con and others: I've been running 2.6.9-ck1 for a couple of days, and seem=
=20
to have hit on a major swapping issue....

My machine is a UP Athlon 2500+ with 512MB, and everything hums along=20
nicely under normal desktop usage.  But when launching UT2004, it just=20
crawls and jerks like hell.  At one point, it appeared to have frozen=20
completely, but I managed to switch to a text console to see what was=20
happening, and basically I'd hit a swap frenzy: kswapd was sucking 50% of=20
the CPU, fighting with the UT2004 process.

My RAM appeared to be almost "full", with no cache/buffers, but only a few=
=20
hundred K of swap was actually being used, and this wasn't changing.  =20
The kswapd frenzy carried on for at least a couple of minutes; then=20
suddenly everything went smooth again and the game played perfectly from=20
then on.

This is definitely new behaviour; I've run every recent 2.6 kernel, with=20
and without the staircase scheduler patch (but not the full -ck), and=20
never had any problems before.  Yes, I'm running the dratted Nvidia=20
driver, but that's not the issue as it's been loaded with every other=20
kernel.  Switching back to 2.6.9-rc3 makes everything behave perfectly=20
again....

Any ideas?  Any more info required?
Cheers
Alastair

=2D-=20
                                        o
Alastair Stevens : child of 1976       /-'_              LPI (Level 1)
  www.altruxsolutions.co.uk           |\/(*)   /\__     Linux Certified
_________________________________ . .(*) _____/    \___________________
        Ditch IE and ignite a new web - www.getfirefox.com

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