From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Linh Dang <linhd@nortel.com>
Cc: David Howells <dhowells@redhat.com>,
Arjan van de Ven <arjan@infradead.org>,
Andrew Morton <akpm@osdl.org>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Christopher Friesen <cfriesen@nortel.com>,
torvalds@osdl.org, hch@infradead.org, matthew@wil.cx,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org
Subject: Re: [PATCH 1/19] MUTEX: Introduce simple mutex implementation
Date: Sat, 17 Dec 2005 02:35:05 +1100 [thread overview]
Message-ID: <43A2DEA9.4000209@yahoo.com.au> (raw)
In-Reply-To: <wn5bqzhm5ex.fsf@linhd-2.ca.nortel.com>
Linh Dang wrote:
>>Do you now see what I mean? (yup, ARM is a llsc architecture.)
>
>
> Well, it may be true for ARM but for ppc (i dunno what exactly llsc
> means but someone in the thread put ppc in llsc group) it's:
>
load locked or load with lock, IIRC.
> loop:
> load-reserve foo => old
> new = old * N
> store-conditional new => foo
> if failed goto loop
>
The point is that the typical use case for a cmpxchg is less optimal
if cmpxchg is simulated with llsc than if the same functionality were
directly implemented with llsc instructions.
--
SUSE Labs, Novell Inc.
Send instant messages to your online friends http://au.messenger.yahoo.com
next prev parent reply other threads:[~2005-12-16 15:35 UTC|newest]
Thread overview: 261+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-12 23:45 [PATCH 1/19] MUTEX: Introduce simple mutex implementation David Howells
2005-12-12 23:45 ` [PATCH 2/19] MUTEX: i386 arch mutex David Howells
2005-12-12 23:45 ` [PATCH 8/19] MUTEX: Drivers I-K changes David Howells
2005-12-12 23:45 ` [PATCH 7/19] MUTEX: Drivers F-H changes David Howells
2005-12-12 23:45 ` [PATCH 6/19] MUTEX: Drivers A-E changes David Howells
2005-12-12 23:45 ` [PATCH 3/19] MUTEX: x86_64 arch mutex David Howells
2005-12-12 23:45 ` [PATCH 5/19] MUTEX: Core kernel changes David Howells
2005-12-12 23:45 ` [PATCH 4/19] MUTEX: FRV arch mutex David Howells
2005-12-12 23:45 ` [PATCH 15/19] MUTEX: Second set of include changes David Howells
2005-12-12 23:45 ` [PATCH 10/19] MUTEX: Drivers N-P changes David Howells
2005-12-12 23:45 ` [PATCH 9/19] MUTEX: Drivers L-M changes David Howells
2005-12-12 23:45 ` [PATCH 13/19] MUTEX: Filesystem changes David Howells
2005-12-12 23:45 ` [PATCH 14/19] MUTEX: First set of include changes David Howells
2005-12-12 23:45 ` [PATCH 12/19] MUTEX: Drivers T-Z changes David Howells
2005-12-12 23:45 ` [PATCH 11/19] MUTEX: Drivers Q-S changes David Howells
2005-12-12 23:45 ` [PATCH 18/19] MUTEX: Security changes David Howells
2005-12-12 23:45 ` [PATCH 17/19] MUTEX: Networking changes David Howells
2005-12-12 23:45 ` [PATCH 16/19] MUTEX: IPC changes David Howells
2005-12-12 23:45 ` [PATCH 19/19] MUTEX: Sound changes David Howells
2005-12-13 0:13 ` [PATCH 1/19] MUTEX: Introduce simple mutex implementation Nick Piggin
2005-12-13 0:19 ` Nick Piggin
2005-12-13 0:19 ` Andrew Morton
2005-12-13 7:54 ` Ingo Molnar
2005-12-13 7:58 ` Andi Kleen
2005-12-13 8:42 ` Andrew Morton
2005-12-13 8:49 ` Andi Kleen
2005-12-13 9:01 ` Andrew Morton
2005-12-13 9:01 ` Andrew Morton
2005-12-13 9:02 ` Andrew Morton
2005-12-13 10:07 ` Jakub Jelinek
2005-12-13 10:11 ` Andi Kleen
2005-12-13 10:15 ` Jakub Jelinek
2005-12-13 10:25 ` Andrew Morton
2005-12-13 10:25 ` Andrew Morton
2005-12-14 10:46 ` Russell King
2005-12-13 9:05 ` Andi Kleen
2005-12-13 9:15 ` Andrew Morton
2005-12-13 9:15 ` Andrew Morton
2005-12-13 9:24 ` Andi Kleen
2005-12-13 9:44 ` Andrew Morton
2005-12-13 9:44 ` Andrew Morton
2005-12-13 9:49 ` Andi Kleen
2005-12-13 10:28 ` Andreas Schwab
2005-12-13 10:30 ` Andi Kleen
2005-12-13 12:33 ` Matthew Wilcox
2005-12-13 22:18 ` Adrian Bunk
2005-12-13 22:25 ` Andi Kleen
2005-12-13 22:32 ` Adrian Bunk
2005-12-13 9:11 ` Ingo Molnar
2005-12-13 9:04 ` Christoph Hellwig
2005-12-13 9:13 ` Ingo Molnar
2005-12-13 10:11 ` Jakub Jelinek
2005-12-13 10:19 ` Christoph Hellwig
2005-12-13 10:27 ` Ingo Molnar
2005-12-15 4:53 ` Miles Bader
2005-12-15 5:05 ` Nick Piggin
2005-12-13 9:09 ` Ingo Molnar
2005-12-13 9:21 ` Andi Kleen
2005-12-13 16:16 ` Linus Torvalds
2005-12-13 21:56 ` Using C99 in the kernel was " Andi Kleen
2005-12-13 23:05 ` Al Viro
2005-12-13 23:41 ` Andi Kleen
2005-12-13 9:03 ` Christoph Hellwig
2005-12-13 9:14 ` Andrew Morton
2005-12-13 9:14 ` Andrew Morton
2005-12-13 9:21 ` Christoph Hellwig
2005-12-13 10:31 ` drivers/scsi/sd.c gcc-2.95.3 Alexey Dobriyan
2005-12-13 8:00 ` [PATCH 1/19] MUTEX: Introduce simple mutex implementation Arjan van de Ven
2005-12-13 9:03 ` Ingo Molnar
2005-12-13 9:09 ` Andi Kleen
2005-12-13 9:34 ` Ingo Molnar
2005-12-13 14:33 ` Mark Lord
2005-12-13 14:45 ` Arjan van de Ven
2005-12-13 9:37 ` Ingo Molnar
2005-12-13 9:19 ` Arjan van de Ven
2005-12-13 9:02 ` Christoph Hellwig
2005-12-13 9:39 ` Ingo Molnar
2005-12-13 10:00 ` Ingo Molnar
2005-12-13 17:40 ` Paul Jackson
2005-12-13 18:34 ` David Howells
2005-12-13 22:31 ` Paul Jackson
2005-12-13 22:31 ` Paul Jackson
2005-12-14 11:02 ` David Howells
2005-12-14 11:12 ` David Howells
2005-12-14 11:18 ` Alan Cox
2005-12-14 12:35 ` David Howells
2005-12-14 12:35 ` David Howells
2005-12-14 13:58 ` Thomas Gleixner
2005-12-14 23:40 ` Mark Lord
2005-12-14 23:54 ` Andrew Morton
2005-12-15 13:41 ` Nikita Danilov
2005-12-15 14:56 ` Alan Cox
2005-12-15 15:52 ` Nikita Danilov
2005-12-15 16:50 ` Christopher Friesen
2005-12-15 20:53 ` Steven Rostedt
2005-12-15 15:55 ` David Howells
2005-12-15 16:22 ` linux-os (Dick Johnson)
2005-12-15 16:22 ` linux-os (Dick Johnson)
2005-12-15 16:28 ` Linus Torvalds
2005-12-15 17:04 ` Thomas Gleixner
2005-12-15 17:09 ` Paul Jackson
2005-12-15 17:17 ` David Howells
2005-12-15 16:51 ` David Howells
2005-12-15 16:56 ` Paul Jackson
2005-12-15 16:56 ` Paul Jackson
2005-12-15 17:28 ` David Howells
2005-12-15 17:48 ` Linus Torvalds
2005-12-15 18:20 ` Nikita Danilov
2005-12-15 20:58 ` Steven Rostedt
2005-12-15 19:21 ` Andrew Morton
2005-12-15 19:38 ` Linus Torvalds
2005-12-15 20:28 ` Steven Rostedt
2005-12-15 20:32 ` Geert Uytterhoeven
2005-12-16 21:41 ` Thomas Gleixner
2005-12-16 21:41 ` Linus Torvalds
2005-12-16 22:06 ` Thomas Gleixner
2005-12-16 22:19 ` Linus Torvalds
2005-12-16 22:32 ` Steven Rostedt
2005-12-16 22:42 ` Thomas Gleixner
2005-12-16 22:41 ` Linus Torvalds
2005-12-16 22:49 ` Steven Rostedt
2005-12-16 23:29 ` Thomas Gleixner
2005-12-17 0:29 ` Joe Korty
2005-12-17 1:00 ` Linus Torvalds
2005-12-17 3:13 ` Steven Rostedt
2005-12-17 7:34 ` Linus Torvalds
2005-12-17 23:43 ` Matthew Wilcox
2005-12-18 0:05 ` Lee Revell
2005-12-18 0:21 ` Matthew Wilcox
2005-12-18 1:25 ` Lee Revell
2005-12-22 12:27 ` Bill Huey
2005-12-19 16:08 ` Ingo Molnar
2005-12-22 12:40 ` Bill Huey
2005-12-22 12:45 ` Bill Huey
2005-12-19 23:46 ` Keith Owens
2005-12-15 14:41 ` Steven Rostedt
2005-12-14 23:57 ` Thomas Gleixner
2005-12-14 23:57 ` Mark Lord
2005-12-15 0:10 ` Thomas Gleixner
2005-12-15 2:46 ` Linus Torvalds
2005-12-15 15:53 ` David Howells
2005-12-15 15:37 ` David Howells
2005-12-15 19:28 ` Andrew Morton
2005-12-15 19:28 ` Andrew Morton
2005-12-15 20:18 ` Andrew Morton
2005-12-15 21:28 ` Steven Rostedt
2005-12-16 22:02 ` Thomas Gleixner
2005-12-16 10:45 ` David Howells
2005-12-13 9:55 ` Ingo Molnar
2005-12-13 0:30 ` Arnd Bergmann
2005-12-13 0:57 ` Daniel Walker
2005-12-13 3:23 ` Steven Rostedt
2005-12-13 2:57 ` Mark Lord
2005-12-13 3:17 ` Steven Rostedt
2005-12-13 9:06 ` Christoph Hellwig
2005-12-13 9:54 ` David Howells
2005-12-13 10:13 ` Ingo Molnar
2005-12-13 10:34 ` Ingo Molnar
2005-12-13 10:37 ` Ingo Molnar
2005-12-13 12:47 ` Oliver Neukum
2005-12-13 13:09 ` Alan Cox
2005-12-13 13:13 ` Matthew Wilcox
2005-12-13 14:04 ` Alan Cox
2005-12-13 13:24 ` Oliver Neukum
2005-12-14 1:00 ` Nick Piggin
2005-12-14 10:54 ` David Howells
2005-12-14 11:17 ` Nick Piggin
2005-12-14 11:46 ` David Howells
2005-12-14 21:23 ` Nick Piggin
2005-12-16 12:00 ` David Howells
2005-12-16 13:16 ` Nick Piggin
2005-12-16 15:53 ` David Howells
2005-12-16 23:41 ` Nick Piggin
2005-12-16 16:02 ` David Howells
2005-12-13 10:48 ` David Howells
2005-12-13 12:39 ` Matthew Wilcox
2005-12-13 10:54 ` Ingo Molnar
2005-12-13 11:23 ` David Howells
2005-12-13 11:24 ` David Howells
2005-12-13 13:45 ` Ingo Molnar
2005-12-13 11:34 ` David Howells
2005-12-13 13:05 ` Alan Cox
2005-12-13 13:15 ` Alan Cox
2005-12-13 23:21 ` Nikita Danilov
2005-12-13 13:32 ` David Howells
2005-12-13 14:00 ` Alan Cox
2005-12-13 14:35 ` Christopher Friesen
2005-12-13 14:44 ` Arjan van de Ven
2005-12-13 14:59 ` Christopher Friesen
2005-12-13 15:23 ` David Howells
2005-12-15 5:24 ` Miles Bader
2005-12-13 15:39 ` David Howells
2005-12-13 16:10 ` Alan Cox
2005-12-14 10:29 ` Arjan van de Ven
2005-12-14 11:03 ` Arjan van de Ven
2005-12-14 11:03 ` Alan Cox
2005-12-14 11:08 ` Arjan van de Ven
2005-12-14 11:24 ` Alan Cox
2005-12-14 11:35 ` Andrew Morton
2005-12-14 11:44 ` Arjan van de Ven
2005-12-14 11:52 ` Andi Kleen
2005-12-14 11:55 ` Arjan van de Ven
2005-12-14 11:57 ` David Howells
2005-12-14 12:19 ` Jakub Jelinek
2005-12-16 1:54 ` Nick Piggin
2005-12-16 11:02 ` David Howells
2005-12-16 13:01 ` Nick Piggin
2005-12-16 13:21 ` Russell King
2005-12-16 13:41 ` Nick Piggin
2005-12-16 13:46 ` Linh Dang
2005-12-16 14:31 ` Russell King
2005-12-16 15:24 ` Linh Dang
2005-12-16 15:35 ` Nick Piggin [this message]
2005-12-16 15:40 ` Kyle Moffett
2005-12-16 15:49 ` Linh Dang
2005-12-16 15:46 ` David Howells
2005-12-16 15:58 ` Russell King
2005-12-17 15:57 ` Nikita Danilov
2005-12-16 16:28 ` Linus Torvalds
2005-12-16 11:30 ` David Howells
2005-12-16 16:33 ` Linus Torvalds
2005-12-16 16:33 ` Linus Torvalds
2005-12-16 22:23 ` David S. Miller
2005-12-16 22:38 ` Linus Torvalds
2005-12-16 22:53 ` David S. Miller
2005-12-17 0:41 ` Jesse Barnes
2005-12-17 7:10 ` David S. Miller
2005-12-17 7:40 ` Linus Torvalds
2005-12-17 17:22 ` Jesse Barnes
2005-12-17 17:19 ` Jesse Barnes
2005-12-17 22:38 ` Richard Henderson
2005-12-17 23:05 ` David S. Miller
2005-12-14 12:17 ` Christoph Hellwig
2005-12-14 11:42 ` Arjan van de Ven
2005-12-14 8:31 ` Ingo Molnar
2005-12-13 20:04 ` Steven Rostedt
2005-12-13 21:03 ` David Howells
2005-12-15 13:58 linux
2005-12-15 16:15 ` Linus Torvalds
2005-12-15 16:52 ` Erik Mouw
2005-12-15 17:23 ` Dick Streefland
2005-12-16 12:17 ` Erik Mouw
2005-12-17 10:59 ` Sander
2005-12-17 14:14 ` Douglas McNaught
2005-12-17 15:09 ` Sander
2005-12-19 10:44 ` Erik Mouw
2005-12-15 19:02 ` Nikita Danilov
2005-12-15 19:09 ` linux
2005-12-15 19:52 ` Linus Torvalds
2005-12-16 1:33 ` linux
2005-12-15 21:18 ` Steven Rostedt
2005-12-15 20:52 ` Steven Rostedt
2005-12-15 17:45 Luck, Tony
2005-12-15 17:45 ` Luck, Tony
2005-12-15 18:00 ` David Howells
2005-12-15 18:48 ` James Bottomley
2005-12-15 20:38 ` Jeff Dike
2005-12-15 23:45 ` Stephen Rothwell
2005-12-16 12:49 linux
2005-12-16 15:24 ` David Howells
2005-12-16 18:03 ` linux
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=43A2DEA9.4000209@yahoo.com.au \
--to=nickpiggin@yahoo.com.au \
--cc=akpm@osdl.org \
--cc=alan@lxorguk.ukuu.org.uk \
--cc=arjan@infradead.org \
--cc=cfriesen@nortel.com \
--cc=dhowells@redhat.com \
--cc=hch@infradead.org \
--cc=linhd@nortel.com \
--cc=linux-arch@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=matthew@wil.cx \
--cc=torvalds@osdl.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.