location of bioq lock

[Poul-Henning Kamp]

In message <20050715035923.B66753 at xorpc.icir.org>, Luigi Rizzo writes:
>On Fri, Jul 15, 2005 at 08:43:17AM +0200, Poul-Henning Kamp wrote:
>> In message <20050714181356.A58300 at xorpc.icir.org>, Luigi Rizzo writes:
>> 
>> >Anyways there might be a way out...
>> >requests go from dev_strategy()
>> 
>> The right place for this is geom_disk.c:g_disk_start() and the start
>> routines of the drivers which do not use geom_disk.
>
>g_disk_start() sonunds good, but i am not sure if other
>drivers export the start routine. It seems to be called
>more or less directly at the end of the strategy() routine of the
>individual driver, and it does not always likes to find
>the queue empty.
>
>But i am still learning on the layering of these things...

You may want to read up on GEOM (http://phk.freebsd.dk/pubs)

Check the cdrom drivers.

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