From: "David S. Miller" <davem@davemloft.net>
To: William Lee Irwin III <wli@holomorphy.com>
Cc: andrea@suse.de, linux-kernel@vger.kernel.org, tglx@linutronix.de,
akpm@osdl.org
Subject: Re: VM fixes [4/4]
Date: Fri, 24 Dec 2004 15:55:08 -0800 [thread overview]
Message-ID: <20041224155508.65783793.davem@davemloft.net> (raw)
In-Reply-To: <20041224212513.GV771@holomorphy.com>
On Fri, 24 Dec 2004 13:25:13 -0800
William Lee Irwin III <wli@holomorphy.com> wrote:
> On Fri, 24 Dec 2004 19:22:19 +0100 Andrea Arcangeli <andrea@suse.de> wrote:
> >> If those old cpus really supported smp in linux, then fixing this bit is
> >> trivial, just change it to short. Do they support short at least?
>
> On Fri, Dec 24, 2004 at 12:55:04PM -0800, David S. Miller wrote:
> > No, they do not. The smallest atomic unit is one 32-bit word.
> > And yes there are SMP systems using these chips.
>
> Would systems described as ev56 by /proc/cpuinfo have such chips?
No. ev4 and earlier have the word or larger load/store limitation.
Only ev5 and later have byte and half-word sized load/store support.
I didn't actually know this when I read your question, so I snooped
around the asm-alpha/ headers and found the comments around the
__alpha_bwx__ ifdef checks. :-)
next prev parent reply other threads:[~2004-12-24 23:55 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-24 17:41 VM fixes [4/4] Andrea Arcangeli
2004-12-24 18:01 ` David S. Miller
2004-12-24 18:22 ` Andrea Arcangeli
2004-12-24 20:55 ` David S. Miller
2004-12-24 21:25 ` William Lee Irwin III
2004-12-24 23:52 ` William Lee Irwin III
2004-12-24 23:55 ` David S. Miller [this message]
2004-12-24 23:41 ` Linus Torvalds
2004-12-25 2:27 ` Andrea Arcangeli
2004-12-25 3:24 ` VM fixes [PF_MEMDIE to TIF_MEMDIE] [5/4] Andrea Arcangeli
2004-12-25 14:53 ` VM fixes [->used_math to PF_USED_MATH] [6/4] Andrea Arcangeli
2004-12-27 7:03 ` Andy Isaacson
2005-01-02 15:41 ` Andrea Arcangeli
2005-01-08 17:17 ` William Lee Irwin III
2004-12-25 0:06 ` VM fixes [4/4] Mitchell Blank Jr
2004-12-25 2:37 ` Andrea Arcangeli
2004-12-24 23:32 ` Linus Torvalds
2004-12-27 13:38 ` Rik van Riel
2004-12-28 9:42 ` Thomas Gleixner
2005-01-02 15:51 ` Andrea Arcangeli
2005-01-02 16:44 ` Rik van Riel
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