From mboxrd@z Thu Jan  1 00:00:00 1970
From: "David S. Miller" <davem@davemloft.net>
Date: Fri, 27 Aug 2004 23:43:06 +0000
Subject: Re: page fault scalability patch final : i386 tested, x86_64
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To: Andi Kleen <ak@suse.de>
Cc: clameter@sgi.com, akpm@osdl.org, wli@holomorphy.com, davem@redhat.com, raybry@sgi.com, ak@muc.de, benh@kernel.crashing.org, manfred@colorfullife.com, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, vrajesh@umich.edu, hugh@veritas.com

On Sat, 28 Aug 2004 01:36:02 +0200
Andi Kleen <ak@suse.de> wrote:

> On some architectures it used to be 24bit only even, but I think that
> has been fixed.

It has, on sparc32 the hashed spinlock scheme is being used
so it's a full 32-bit counter now.

Well, it's not even 32-bits, it's actually 31-bits since the
value is declared as signed.

Only 64-bit platforms provide the atomic64_t implementation.
We'd need to deal with that before making your suggested
change.