Re: kupdated using all CPU

[Andrew Morton]

john wrote:
> 
> [Mon, Feb 18, 2002 at 02:13:06PM -0800] [e-mail] wrote:
> + john wrote:
> + >
> + > hi,
> + > ive searched all over and found many references to this problem, but
> + > never found an actual solution.  the problem is that during heavy
> + > disk I/O, kupdated will periodically take up ALL the cpu.
> +
> + I've seen a couple of reports of this, nothing to indicate that it's
> + a common problem?
> +
> + In the other reports, it was related to extremely low disk throughput.
> + What does `hdparm -t /dev/hda' say?
> 
> root@doom:~# hdparm -t /dev/hda
> 
> /dev/hda:
>  Timing buffered disk reads:  64 MB in 25.60 seconds =  2.50 MB/sec

ugh.  OK, I'll see if I cen reproduce this - there's no reason
why disk suckiness should cause high CPU load.  But you need to
pay some attention to your IDE settings in kernel config, and
possibly tuning.

-