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To: dinkevich@gmail.com
From: "M. Warner Losh" <imp@bsdimp.com>
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Subject: Re: stack synchronization
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In message: <6.1.2.0.2.20050110085622.0338a980@pop.gmail.com>
            Boris Dinkevich <dinkevich@gmail.com> writes:
: I see no reference to giant locking in 5.3 (except in event/task threads)

It is implicit...

: Does this not affect performance when multiple devices are connected to the 
: host ?

Yes.

: Also, I have seen a modification to the bsd stack by Hans Petter Selasky, 
: where he uses per bus mtxes for locking,
: is this not the better approach to the problem ?

Likely, but there are some issues with Hans' driver still.

: Interrupt is synced via Giant ?

Yes.

Warner