kern/139549: [firewire] reconnecting a firewire disk does not cause the disklabel to update correctly/invalidate the cache

[Dirk-Willem van Gulik]

The following reply was made to PR kern/139549; it has been noted by GNATS.

From: Dirk-Willem van Gulik <Dirk-Willem.van.Gulik at bbc.co.uk>
To: FreeBSD-gnats-submit at FreeBSD.org, freebsd-firewire at FreeBSD.org
Cc:  
Subject: kern/139549: [firewire] reconnecting a firewire disk does not cause
 the disklabel to update correctly/invalidate the cache
Date: Sat, 31 Oct 2009 18:29:55 +0100

 Sean wrote:
 
 > pre-8.0 has a default of "3" set to the sysctl "firewire.hold_count" or
 > some such thing that keeps the disconnect/removal of a firewire device
 > from doing "things".
 >
 > Try setting that value to "1" and see if the problem manifests itself.
 
 Regardless of the setting - it seems that the disklabel continues to be 
 cached - and thus no updating of the /dev's (e.g. matching the actual 
 slices/partitions) happens.
 
 I guess that we need a
 
 	firewire.force_update_on_reconnect
 
 which completley wacks any disklabel/da -or- perhaps abandons trying to 
 use the lowest number possible; but keeps on counting it as a higher one.
 
 Thanks,
 
 Dw
 
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