linux-kernel - Re: [Regression] Filesystem I/O is CPU-bound in rc7 and rc8

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Message-ID: <m3fx4vnbic.fsf@lugabout.jhcloos.org>
Date:	Sat, 20 Feb 2010 10:59:31 -0500
From:	James Cloos <cloos@...loos.com>
To:	Dave Airlie <airlied@...il.com>
Cc:	linux-kernel@...r.kernel.org, Chris Mason <chris.mason@...cle.com>,
	linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org,
	linux-btrfs@...r.kernel.org, jfs-discussion@...ts.sourceforge.net
Subject: Re: [Regression] Filesystem I/O is CPU-bound in rc7 and rc8

>>>>> "Dave" == Dave Airlie <airlied@...il.com> writes:

>> 
>> OK.  I do use radeon kms (r100).

Dave> I've just sent a pull req to Linus
Dave> http://bugzilla.kernel.org/show_bug.cgi?id=15328
Dave> this

Dave> http://bugzilla.kernel.org/attachment.cgi?id=25107
Dave> patch.

I'll give that a try as soon as I can schedule a reboot.

Dave> The relevant piece of dmesg is at the top ;-), where
Dave> it states if you have PAT support or not, but I
Dave> suspect if you try this patch it'll fix it.

Oh.  I thought you were referring to errors....

Anyway, no, the p3m does not support PAT:

[    0.000000] PAT not supported by CPU.

-JimC
-- 
James Cloos <cloos@...loos.com>         OpenPGP: 1024D/ED7DAEA6
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