Re: Unplugging of SBP-2 devices still does not work

[Ben Collins <bcollins@debian.org>]

Sounds like it is probably hanging in sbp2 while it is trying to logout.

Perhaps you can turn on spinlock debug to see if there is a deadlock
somewhere? Check wstat for the knodemgrd process aswell, see what it is
waiting for.

On Sat, Jul 23, 2005 at 09:58:18PM +0200, Stefan Richter wrote:
> I wrote:
> >Problem 1) Hot unplugging of SBP-2 hangs ieee1394's nodemgr
> [...]
> >[unplug disk]
> >Jul 23 20:08:53 shuttle kernel: ieee1394: Node changed: 1-01:1023 -> 
> >1-00:1023
> >Jul 23 20:08:53 shuttle kernel: ieee1394: Node suspended: 
> >ID:BUS[1-00:1023]  GUID[0001d202e0200ef1]
> >Jul 23 20:08:53 shuttle kernel: ieee1394: sbp2: sbp2_remove
> >Jul 23 20:08:53 shuttle kernel: Synchronizing SCSI cache for disk sda:
> 
> I should provide perhaps a little more background about nodemgr. It waits 
> for
> events on the FireWire bus. If it detects physical removal of a node, it 
> calls
> remove callbacks from IEEE 1394 protocol drivers such as sbp2. That's where
> sbp2_remove() kicks in. So it all happens in nodemgr's process context, 
> although
> the hang occurs somewhere in the scsi mid or high level, or perhaps in the 
> driver
> core when it is called from scsi.
> 
> [...]
> >Jul 23 21:04:49 shuttle kernel: ieee1394: GUID 0x00301bac00002ba4: 
> >bus_info_data[0] = 0x0404912b
> 
> Ignore this line. It is normally not logged by ieee1394.
> -- 
> Stefan Richter
> -=====-=-=-= -=== =-===
> http://arcgraph.de/sr/
> 
> 
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