linux-kernel - Re: [git patches] libata updates

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Message-ID: <Pine.LNX.4.64.0704301348060.31107@blackbox.fnordora.org>
Date:	Mon, 30 Apr 2007 13:51:00 -0700 (PDT)
From:	alan <alan@...eserver.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
cc:	Stephen.Clark@...lark.us, Jeff Garzik <jeff@...zik.org>,
	Chuck Ebbert <cebbert@...hat.com>, linux-ide@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [git patches] libata updates

On Mon, 30 Apr 2007, Alan Cox wrote:

>> Yeah the kernel will boot but the hd performance is sh*t on my laptop. I
>> am running FC6 with
>> kernel 2.6.21 and without the combined_mode setting my disk performance
>> goes down to a
>> whopping 1.25mb/sec from 44mb/sec when I boot with combined_mode=libata.
>
> Then something is very wrong with the way you are setting it up, or the
> current code. Please post a dmesg booting with libata driving all your
> disks and it can get fixed before 2.6.22
>
> Do you happen to know how FC7test4 behaves on your box btw

I did the upgrade last night.  Drive performance was SLLOOWW.  When it 
came time to the reboot, I had a corrupted disk.  (Not certain if that was 
the fault of the upgrade.  I have to finish the fsck repairs first.) And 
this is with ext3.  Not good.

I have been seeing real bad driver performance on the latest FC6 kernel as 
well.

-- 
"Invoking the supernatural can explain anything, and hence explains nothing."
                   - University of Utah bioengineering professor Gregory Clark
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