2007-05-31 14:45:44

by Frank Sorenson

Subject: Combined mode quirk removal kills performance

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The patch to "remove combined mode quirk" (git bisect says
8cdfb29c0cd8018f92214c11c631d8926f4cb032) makes my laptop run slower
than a dead sloth. "hdparm -T" indicates that buffered disk reads on my
hard drive drop from 48-50 MB/sec to 1-2MB/sec, and the system is nearly
unusable.

System is a Dell Inspiron E1705 (Core 2 Duo 2.16GHz) running x86_64 FC6.

Frank
- --
Frank Sorenson - KD7TZK
Linux Systems Engineer, DSS Engineering, UBS AG
[email protected]
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2007-05-31 15:46:38

by Stephen Clark

Subject: Re: Combined mode quirk removal kills performance

Frank Sorenson wrote:

>-----BEGIN PGP SIGNED MESSAGE-----
>Hash: SHA1
>
>The patch to "remove combined mode quirk" (git bisect says
>8cdfb29c0cd8018f92214c11c631d8926f4cb032) makes my laptop run slower
>than a dead sloth. "hdparm -T" indicates that buffered disk reads on my
>hard drive drop from 48-50 MB/sec to 1-2MB/sec, and the system is nearly
>unusable.
>
>System is a Dell Inspiron E1705 (Core 2 Duo 2.16GHz) running x86_64 FC6.
>
>Frank
>- --
>Frank Sorenson - KD7TZK
>Linux Systems Engineer, DSS Engineering, UBS AG
>[email protected]
>-----BEGIN PGP SIGNATURE-----
>Version: GnuPG v1.4.7 (GNU/Linux)
>Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org
>
>iD8DBQFGXt+JaI0dwg4A47wRAqJmAJ4k4E9ekkitOdQ72HUXbky11nD1cACghGu6
>y7Y71PPaKHYcQhYSfL55bNk=
>=MPYY
>-----END PGP SIGNATURE-----
>-
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Hi Frank,

I had the same problem. I am running FC6 and had to build a custom
kernel that did not configure
in the old ide driver - then my speed of my harddrive went back to normal.

HTH,
Steve

--

"They that give up essential liberty to obtain temporary safety,
deserve neither liberty nor safety." (Ben Franklin)

"The course of history shows that as a government grows, liberty
decreases." (Thomas Jefferson)