Re: NUMA API observations

[Bill Davidsen]

Andi Kleen wrote:
> On Mon, Jun 14, 2004 at 02:21:28PM -0700, Paul Jackson wrote:
>
> > Andi wrote:
> >
> > > How should a user space application sanely discover the cpumask_t
> > > size needed by the kernel?  Whoever designed that was on crack.
> > >
> > > I will probably make it loop and double the buffer until EINVAL
> > > ends or it passes a page and add a nasty comment.
> >
> > I agree that a loop is needed.  And yes someone didn't do a very
> > good job of designing this interface.
>
>
> I add some code to go upto a page now.
>
> This adds a hardcoded limit of 32768 CPUs to libnuma. That's not 
> nice, but we have to stop somewhere in case the EINVAL is returned
> for other reason

Should be enough for desktop machines...

--
   -bill davidsen (davidsen@xxxxxxx)
"The secret to procrastination is to put things off until the
 last possible moment - but no longer"  -me
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