Re: mutexes, locks and so on...

[Andrew Doran <ad%homeworld.netbsd.org@localhost>]

On Wed, Nov 17, 2010 at 07:55:13AM -0500, Thor Lancelot Simon wrote:
> On Wed, Nov 17, 2010 at 01:31:51PM +0100, Johnny Billquist wrote:
> >
> > But you could perhaps argue that this is a bug in itself, and  
> > mutex_vector_enter should not take a spin mutex on its own when a  
> > mutex_spin_enter function exist.
> 
> I don't think that's right.  I don't believe spin mutexes are _required_
> to be taken with mutex_spin_enter() -- mutex_enter() should work fine.
> It has to, because it is supposed to be invisible to the programmer
> whether mutexes are spin or adaptive, except for the initial IPL used
> to allocate them.
> 
> At least, that is how I understand it.  Which may be wrong.

Thor is right.  Johnny have you read the manual page? :-)