minor GEOM disk API change coming

[Andrey V. Elsukov]

On 21.06.2012 08:29, Kenneth D. Merry wrote:
> 	Fix a bug which causes a panic in daopen(). The panic is caused by
> 	a da(4) instance going away while GEOM is still probing it.
> 	
> 	In this case, the GEOM disk class instance has been created by
> 	disk_create(), and the taste of the disk is queued in the GEOM
> 	event queue.
> 	
> 	While that event is queued, the da(4) instance goes away.  When the
> 	open call comes into the da(4) driver, it dereferences the freed
> 	(but non-NULL) peripheral pointer provided by GEOM, which results
> 	in a panic.

I think this situation is very specific for the GEOM_DISK class, and
this callback will be less useful for other classes.
Does g_cancel_event() cannot help you prevent tasting?

-- 
WBR, Andrey V. Elsukov

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 488 bytes
Desc: OpenPGP digital signature
Url : http://lists.freebsd.org/pipermail/freebsd-current/attachments/20120621/09a93819/signature.pgp