Re: 2.6.20.3 AMD64 oops in CFQ code

[Bill Davidsen]

Tejun Heo wrote:
> [resending.  my mail service was down for more than a week and this
> message didn't get delivered.]
>
> linux@xxxxxxxxxxx wrote:
>   
> > > Anyway, what's annoying is that I can't figure out how to bring the
> > > drive back on line without resetting the box.  It's in a hot-swap
> > >       
> enclosure,
>   
> > > but power cycling the drive doesn't seem to help.  I thought libata
> > >       
> hotplug
>   
> > > was working?  (SiI3132 card, using the sil24 driver.)
> > >       
>
> Yeah, it's working but failing resets are considered highly dangerous
> (in that the controller status is unknown and may cause something
> dangerous like screaming interrupts) and port is muted after that.  The
> plan is to handle this with polling hotplug such that libata tries to
> revive the port if PHY status change is detected by polling.  Patches
> are available but they need other things to resolved to get integrated.
>  I think it'll happen before the summer.
>
> Anyways, you can tell libata to retry the port by manually telling it to
> rescan the port (echo - - - > /sys/class/scsi_host/hostX/scan).
>   
I won't say that's voodoo, but if I ever did it I'd wipe down my 
keyboard with holy water afterward. ;-)

Well, I did save the message in my tricks file, but it sounds like a 
last ditch effort after something get very wrong.

--
bill davidsen <davidsen@xxxxxxx>
 CTO TMR Associates, Inc
 Doing interesting things with small computers since 1979

-
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/