Re: PPP and disk activity

Jens Axboe (axboe@image.dk)
Fri, 13 Aug 1999 18:25:13 +0200

On Fri, Aug 13 1999, Pasi Kärkkäinen wrote:
> I have weird behaviour in my "router"-box (p120, 96mt ram, ide disks,
> linux 2.0.37). The box is masquerade-router for a couple of workstations
> (Linux too). So, The router-box has PPP-connection to my ISP and
> everything works OK if I do not have disk activity on the router-box.
>
> For example, if I copy/move big files on the local disks of the router-box
> the PPP-connection seems to freeze for that time.. While copying the files
> on the router-box I get over 80% packet loss when pinging some
> internet-server from the workstations (masquerade) at the time while the
> router-box has disk-activity.
>
> As well, I'm not able to take ssh connections while the router-box has
> disk-activity.. immediately after the disk-activity stops , ssh connection
> is enabled. What's wrong?

I'm guessing that you have IDE disks in the server. Try unmasking
interrupts with hdparm (-u).

-- 
*  Jens Axboe <axboe@image.dk>
*  Linux CD-ROM Maintainer
*  http://www.kernel.dk


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