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Date: Sun, 6 Jan 2002 02:45:13 -0800 (PST)
From: Julian Elischer <julian@elischer.org>
To: Terry Lambert <tlambert2@mindspring.com>
Cc: Robert Watson <rwatson@freebsd.org>,
	Alfred Perlstein <bright@mu.org>, arch@freebsd.org
Subject: Re: freeing thread structures.
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On Sun, 6 Jan 2002, Terry Lambert wrote:

> Robert Watson wrote:
> > I used to think that idea was cool, and now I just think it's evil.  The
> > reason to have per-thread credentials in kernel is to reduce the
> > requirement for locking and to allow consistent use of credentials while
> > in kernel.
> 
> As Julian notes, having per thread credentials means locking
> in thread_exit(), when it would not otherwise be necessary.

NOT having it means needing locking at every access..
take your pick..
I prefer having a reference per thread.

> 
> [ ... other argument about the evils of threads with different
> credentials in the same process ... ]
> 
> I agree: it's evil.
> 
> So the question becomes: can we get rid of the locking in the
> thread_exit() function if we didn't have per thread credentials?
> 
> -- Terry
> 
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