How is supposed to be protected the units list?

[Alexander Motin]

Attilio Rao wrote:
> 2010/3/5 Attilio Rao <attilio at freebsd.org>:
>> 2010/3/4 Matthew Jacob <mj at feral.com>:
>>> The referred to patch at least got me out of panic case :-)..
>>>
>>> http://people.freebsd.org/~mjacob/scsi_da.c.patch
>> Yes, honestly the main intent of this patch is to offer a stable
>> ground for correct handling of periph. When looking about refcounting
>> them correctly, the main problem is that there was no initial
>> condition assuring safety, and the initial patch should address this,
>> but I'm sure there are places where periph refcount is not handled
>> correctly and this may be one.
> 
> So, as long as it seems nobody had a strong argument against this
> patch, what do you think about me committing it?
> We can further refine later if we think it is the case.
> 
> Also, I think that Matt's patch should be committed just after this
> one (and possibly we should investigate a similar add-on for the ata
> counterpart too?).

I have already told my opinion, that second lock may be not needed. I
would like to think a bit more about both patches after getting back
from the conference. Thanks,

-- 
Alexander Motin