KSD/TSD take 2 (was: KSE critical regions)

[David Xu]

----- Original Message ----- 
From: "Daniel Eischen" <eischen at vigrid.com>
To: "Terry Lambert" <tlambert2 at mindspring.com>
Cc: <threads at freebsd.org>; "David Xu" <davidxu at freebsd.org>; "Julian Elischer" <julian at elischer.org>; <marcel at xcllnt.net>
Sent: Friday, July 25, 2003 3:43 PM
Subject: Re: KSD/TSD take 2 (was: KSE critical regions)


> On Fri, 25 Jul 2003, Terry Lambert wrote:
> 
> > Daniel Eischen wrote:
> > > I'd like to try and get his implemented in this next
> > > round of changes.  If you are going to add a system
> > > call, it's easy enough just to call the guts of it
> > > from kse_create().
> > 
> > FWIW: One trick would be to use an "invalid" value for one of the
> > parameters on the existing call to mux you into an alternate
> > implementsion (which could even take additional parameters, for
> > obvious reasons).
> 
> Possibly...
> 
>     i386_set_ldt(int start_sel, union descriptor *descs, int num_sels);
> 
> You could use start_sel = 0 and num_sels = 1 to have it automatically
> find the first one not already allocated.  The function already
> returns the first selector allocated.
> 
Not only allocate, there needs a deallocate call.

> -- 
> Dan Eischen
> 
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