Re: [2.6.1 vanilla] Accessing CD-ROM drive causes 94% "hi" load

[Mike Fedyk]

On Fri, Jan 16, 2004 at 02:48:16PM +0100, Marc-Christian Petersen wrote:
> Hello there,
> 
> accessing my CD-ROM drive causes my system to generate 94% "hi" in
> top. I reproduced it using the following steps:
> 
> 1. mount /dev/hda /cdrom
> 2. cat /cdrom/* > /dev/null
> 
> During this timeperiod, the system does almost stop to do any other
> I/O, i.e. accessing my SATA drives on an LVM2 stripeset and doing "cat
> largefile > /dev/null" does not read the usual 60 MB/s but only like 2
> or 3. I am using the anticipatory scheduler, but tried out the
> deadline elevator which doesn't change anything.

Try hdparm -d1 on your cdrom drive.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/