Re: HD access sluggish in 2.6.0

From: William Lee Irwin III
Date: Fri Dec 19 2003 - 03:10:56 EST


On Thu, Dec 18, 2003 at 07:57:05PM -0600, Yun Zhou wrote:
> I'm using a system with 1HD (DC WD600BB-00CAA1 60 GB) using kernel 2.6.0.
> Whenever the system uses the disk extensively (copying a file, untarring,
> etc.), it grinds to a near halt, with the CPU usage at about 100%, even for a
> simple copying operation.
> This problem is not present when using 2.4.22, nor any of the 2.4 series
> kernels that I've tried. Does anyone know what is causing this?
> Thanks in advance!

This is typical of IDE disks where the driver is pessimistically using
PIO. A dmesg and .config would help, plus maybe readprofile(1) results
(you'll have to boot with profile=1 on the kernel command-line.) just
in case it's actually something else.


-- wli
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