linux-kernel - Re: [RFC] killing the NR

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Date:	Sat, 17 Feb 2007 09:37:05 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Russell King <rmk+lkml@....linux.org.uk>
Cc:	Arnd Bergmann <arnd@...db.de>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andi Kleen <ak@...e.de>, Ingo Molnar <mingo@...e.hu>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [RFC] killing the NR_IRQS arrays.


> > Rather than having the job of rewriting this code during 2.6, I'd much
> > prefer to get something sorted, even if it is ARM only before 2.6.
> > 
> > I believe that there are some common problems with the existing API
> > which have been hinted at over the last few days, such as large
> > NR_IRQS.  As such, I think it would be a good idea to try to thrash
> > this issue out and get something which everyone is happy with.
> > 
> > Additionally, I've added Alan's "reserve then hook" idea to the API;
> > I seem to remember there is a case in IDE which needs something like
> > this.

You might want to have a look at the powerpc API with it's remaping
capabilities. It's very nice for handling multiple domain spaces. It
might be of some use for you.

I like your proposed API, I think that's where we want to go in the long
run.

Ben.


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