Re:Re: Sbp2 problems and iPod hangs

On Tue, 2004-10-12 at 17:24, Stefan Richter wrote:

> Juergen Helmers wrote:
> > The kernel I am running is 2.6.7-2.tmb.6mdk.
> ...
> > 1. after umounting the iPod, "rmmod sbp2" hangs.
>
> Very probably a hotplug problem of the scsi drivers, or how sbp2 deals
> with them. Sbp2 in Linux 2.6.7 already contains all relevant updates
> from linux1394.org, so the only chances I see here are an update of the
> scsi subsystem (practically of the whole kernel) or a dumbed-down kernel
> configuration (e.g. no smp support or whatnot).
>
> The latest kernel I tested, linux-2.6.8.1 from kernel.org, featured
> those hangs with scd devices (sr_mod), but so far not with sd devices
> like harddisks.

well I do have an SMP system which might complicate things, I suppose...

>
> > 2. During transfers of larger amounts of data, the arrows spinning in a
> > circle stop and the iPod does not respond anymore. I tried to load the
> > sbp2 modules with "force_inquiry_hack=1" and or "max_speed=1" to get
> > more stable transfers, to no avail.
>
> Also try serialize_io=1 --- if you didn't do so already. The inquiry

I tried that and well it works like a charm so far. I added the
"serialize_io=1 max_speed=1" to /etc/modules.conf an so far I havent had
a single crash of the iPod even under heavy load.

Thanks a lot for the tip.

Juergen

> hack is only relevant during initial scanning of the device. A reduced
> max_speed may help with substandard hardware (EMI, noise) or in rare
> cases where the actual link speed of a device is not recognized by the
> drivers.
>
> > I there anything else I could try to get more stable performance out of
> > the iPod?
>
> I hate to say this: Yes, you could back down to kernel 2.4. I believe
> there are contributed binary packages available for Mandrake 10.

-------------------------------------------------------
This SF.net email is sponsored by: IT Product Guide on ITManagersJournal
Use IT products in your business? Tell us what you think of them. Give us
Your Opinions, Get Free ThinkGeek Gift Certificates! Click to find out more
http://productguide.itmanagersjournal.com/guidepromo.tmpl
_______________________________________________
mailing list Linux1394-user@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux1394-user