From: Ralf Baechle <ralf@linux-mips.org>
To: Christoph Lameter <clameter@sgi.com>
Cc: David Howells <dhowells@redhat.com>,
Nick Piggin <nickpiggin@yahoo.com.au>,
Arjan van de Ven <arjan@infradead.org>,
Dong Feng <middle.fengdong@gmail.com>,
ak@suse.de, Paul Mackerras <paulus@samba.org>,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org
Subject: Re: Why Semaphore Hardware-Dependent?
Date: Tue, 29 Aug 2006 17:20:55 +0100 [thread overview]
Message-ID: <20060829162055.GA31159@linux-mips.org> (raw)
In-Reply-To: <Pine.LNX.4.64.0608290855510.18031@schroedinger.engr.sgi.com>
On Tue, Aug 29, 2006 at 08:56:36AM -0700, Christoph Lameter wrote:
> > Because i386 (and x86_64) can do better by using XADDL/XADDQ.
>
> And Ia64 would like to use fetchadd....
>
> > CMPXCHG is not available on all archs, and may not be implemented on all archs
> > through other atomic instructions.
>
> Which arches do not support cmpxchg?
MIPS, Alpha - probably any pure RISC load/store architecture.
Ralf
next prev parent reply other threads:[~2006-08-29 16:20 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-27 19:22 Why Semaphore Hardware-Dependent? Dong Feng
2006-08-27 20:52 ` Andi Kleen
2006-08-27 21:05 ` Christoph Lameter
2006-08-27 21:39 ` Andi Kleen
2006-08-27 22:14 ` Christoph Lameter
2006-08-28 0:18 ` Paul Mackerras
2006-08-28 5:14 ` Chris Wedgwood
2006-08-28 5:21 ` Christoph Lameter
2006-08-28 5:56 ` Jan Engelhardt
2006-08-28 12:35 ` linux-os (Dick Johnson)
2006-08-28 7:23 ` Andi Kleen
2006-08-29 1:00 ` Paul Mackerras
2006-08-28 7:30 ` Arjan van de Ven
2006-08-29 1:18 ` Nick Piggin
2006-08-29 6:07 ` Andi Kleen
2006-09-13 17:54 ` Nick Piggin
2006-08-29 10:05 ` David Howells
2006-08-29 10:56 ` Andi Kleen
2006-08-29 17:40 ` Andrew Morton
2006-08-29 19:10 ` Benjamin LaHaise
2006-08-29 15:56 ` Christoph Lameter
2006-08-29 16:20 ` Ralf Baechle [this message]
2006-08-29 16:25 ` David Howells
2006-08-29 16:28 ` Christoph Lameter
2006-08-29 16:57 ` David Howells
2006-08-29 16:53 ` Ralf Baechle
2006-08-29 16:58 ` Geert Uytterhoeven
2006-08-29 17:22 ` Andi Kleen
2006-08-29 17:36 ` Christoph Lameter
2006-08-29 18:18 ` Andi Kleen
2006-08-29 18:30 ` David Howells
2006-08-29 18:33 ` Andi Kleen
2006-08-29 18:56 ` David Howells
2006-08-29 18:41 ` Christoph Lameter
2006-09-13 18:04 ` Nick Piggin
2006-09-13 18:07 ` Christoph Lameter
2006-09-13 18:13 ` Nick Piggin
2006-09-13 18:16 ` Christoph Lameter
2006-09-13 18:50 ` David Howells
2006-09-13 19:25 ` Nick Piggin
2006-09-14 11:41 ` David Howells
2006-09-14 15:27 ` Nick Piggin
2006-09-14 15:38 ` Nick Piggin
2006-09-15 8:59 ` David Howells
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