Subject: Re: CVS commit: src
To: None <wrstuden@netbsd.org>
From: YAMAMOTO Takashi <yamt@mwd.biglobe.ne.jp>
List: tech-kern
Date: 06/20/2004 14:15:24
> > > Module Name:	src
> > > Committed By:	hannken
> > > Date:		Tue May 25 14:55:47 UTC 2004
> > 
> > > - Add function transferlockers to transfer any waiting processes from
> > >   one lock to another.
> > 
> > i strongly object against adding a new fancy lockmgr feature.
> > in this case, it should be handled in an ffs-internal manner.
> 
> Well, what else should he have done? He has to move the sleepers from one
> lock to another, given what he's doing (I looked hard at this at the time
> it was added). At the time he decides to do the transfer, the sleepers are
> ALREADY asleep on a lock. So there's no ffs-internal way to handle this; 
> the sleepers are already outside of the ffs code.

i think that having some tricks in VOP_LOCK/UNLOCK/ISLOCKED is enough.
(in addition to stopping exporting v_vnlock, of course.)

YAMAMOTO Takashi