Subject: Re: [RFC] killing the NR_IRQS arrays.
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Russell King <rmk+lkml@arm.linux.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>, "Eric W. Biederman" <ebiederm@xmission.com>,
       linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
       Linus Torvalds <torvalds@linux-foundation.org>,
       Andrew Morton <akpm@linux-foundation.org>, Andi Kleen <ak@suse.de>,
       Ingo Molnar <mingo@elte.hu>, Alan Cox <alan@lxorguk.ukuu.org.uk>
In-Reply-To: <20070216195256.GE2572@flint.arm.linux.org.uk>
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	 <20070216195256.GE2572@flint.arm.linux.org.uk>
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Date: Sat, 17 Feb 2007 09:37:05 +1100
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> > 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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