From: Krzysztof Halasa <khc@pm.waw.pl>
To: "Albert Cahalan" <acahalan@gmail.com>
Cc: linux-kernel@vger.kernel.org,
"Linus Torvalds" <torvalds@osdl.org>,
linux-os@analogic.com, mingo@elte.hu, akpm@osdl.org,
arjan@infradead.org
Subject: Re: [patch] spinlocks: remove 'volatile'
Date: Sat, 08 Jul 2006 12:45:13 +0200 [thread overview]
Message-ID: <m3sllce5om.fsf@defiant.localdomain> (raw)
In-Reply-To: <787b0d920607072054i237eebf5g8109a100623a1070@mail.gmail.com> (Albert Cahalan's message of "Fri, 7 Jul 2006 23:54:10 -0400")
"Albert Cahalan" <acahalan@gmail.com> writes:
> That's all theoretical though. Today, gcc's volatile does
> not follow the C standard on modern hardware. Bummer.
> It'd be low-performance anyway though.
I think gcc's volatile does in fact follow the standard. The standard
simply doesn't say anything about hardware accesses, SMP, PCI etc.
You must know what you're doing, and for some things you need a bit
of assembler.
--
Krzysztof Halasa
next prev parent reply other threads:[~2006-07-08 10:45 UTC|newest]
Thread overview: 119+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-08 3:54 [patch] spinlocks: remove 'volatile' Albert Cahalan
2006-07-08 5:25 ` Linus Torvalds
2006-07-08 6:39 ` Nick Piggin
2006-07-08 18:53 ` Linus Torvalds
2006-07-08 9:45 ` Joe Korty
2006-07-08 9:52 ` Arjan van de Ven
2006-07-08 9:59 ` David Schwartz
2006-07-08 10:24 ` Thomas Gleixner
2006-07-08 15:49 ` Albert Cahalan
2006-07-08 18:31 ` Thomas Gleixner
2006-07-08 19:33 ` Albert Cahalan
2006-07-08 20:11 ` Linus Torvalds
2006-07-09 21:10 ` Pavel Machek
2006-07-09 22:18 ` Linus Torvalds
2006-07-10 16:25 ` marty fouts
2006-07-08 23:10 ` David Schwartz
2006-07-08 13:57 ` Andi Kleen
2006-07-08 19:13 ` Linus Torvalds
2006-07-08 10:45 ` Krzysztof Halasa [this message]
-- strict thread matches above, loose matches on Subject: below --
2006-07-08 6:12 trajce nedev
2006-07-08 6:19 ` Chase Venters
2006-07-08 6:45 ` trajce nedev
2006-07-08 6:58 ` Arjan van de Ven
2006-07-08 7:02 ` Vadim Lobanov
2006-07-08 13:46 ` Chase Venters
2006-07-09 4:39 ` Benjamin Herrenschmidt
2006-07-14 3:30 ` Steven Rostedt
2006-07-08 18:23 ` Linus Torvalds
2006-07-07 10:21 Chuck Ebbert
2006-07-07 17:09 ` Linus Torvalds
2006-07-05 11:46 [patch] uninline init_waitqueue_*() functions Ingo Molnar
2006-07-05 17:10 ` Andrew Morton
2006-07-05 19:35 ` Ingo Molnar
2006-07-05 20:18 ` Andrew Morton
2006-07-05 20:36 ` Linus Torvalds
2006-07-05 20:47 ` Ingo Molnar
2006-07-05 21:21 ` Linus Torvalds
2006-07-05 21:45 ` Ingo Molnar
2006-07-05 22:09 ` Linus Torvalds
2006-07-05 23:11 ` Linus Torvalds
2006-07-06 8:16 ` [patch] spinlocks: remove 'volatile' Ingo Molnar
2006-07-06 8:23 ` Ingo Molnar
2006-07-06 9:27 ` Heiko Carstens
2006-07-06 9:34 ` Arjan van de Ven
2006-07-06 11:59 ` linux-os (Dick Johnson)
2006-07-06 12:01 ` Arjan van de Ven
2006-07-06 12:29 ` linux-os (Dick Johnson)
2006-07-06 12:39 ` Arjan van de Ven
2006-07-06 13:39 ` J.A. Magallón
2006-07-06 13:43 ` Arjan van de Ven
2006-07-06 14:05 ` Chase Venters
2006-07-06 14:26 ` Andreas Schwab
2006-07-06 16:40 ` Nick Piggin
2006-07-06 23:19 ` David Schwartz
2006-07-06 18:15 ` Mark Lord
2006-07-06 19:15 ` Linus Torvalds
2006-07-06 19:33 ` Chris Friesen
2006-07-06 19:37 ` Mark Lord
2006-07-06 20:28 ` Chris Friesen
2006-07-06 20:32 ` Linus Torvalds
2006-07-06 19:38 ` Arjan van de Ven
2006-07-06 19:41 ` Måns Rullgård
2006-07-06 19:42 ` Jeff Garzik
2006-07-06 19:58 ` Linus Torvalds
2006-07-06 20:27 ` Mark Lord
2006-07-06 20:40 ` Chris Friesen
2006-07-06 21:00 ` Linus Torvalds
2006-07-08 8:40 ` Avi Kivity
2006-07-08 8:51 ` Arjan van de Ven
2006-07-08 9:20 ` Avi Kivity
2006-07-08 9:51 ` Arjan van de Ven
2006-07-08 10:18 ` Avi Kivity
2006-07-08 10:28 ` Thomas Gleixner
2006-07-09 4:19 ` Benjamin Herrenschmidt
2006-07-09 12:47 ` Avi Kivity
2006-07-09 19:16 ` David Schwartz
2006-07-09 19:51 ` Theodore Tso
2006-07-06 16:07 ` Linus Torvalds
2006-07-06 16:13 ` Linus Torvalds
2006-07-06 17:04 ` Jeff Garzik
2006-07-06 17:52 ` linux-os (Dick Johnson)
2006-07-06 18:00 ` Linus Torvalds
2006-07-06 21:02 ` J.A. Magallón
2006-07-06 21:12 ` Linus Torvalds
2006-07-06 18:10 ` Michael Buesch
2006-07-06 18:16 ` Chase Venters
2006-07-07 18:16 ` Krzysztof Halasa
2006-07-07 19:51 ` linux-os (Dick Johnson)
2006-07-07 20:25 ` Linus Torvalds
2006-07-07 21:22 ` linux-os (Dick Johnson)
2006-07-07 21:48 ` Chase Venters
2006-07-08 10:00 ` Krzysztof Halasa
2006-07-08 13:41 ` Chase Venters
2006-07-08 20:09 ` Krzysztof Halasa
2006-07-08 20:40 ` Chase Venters
2006-07-08 20:47 ` Chase Venters
2006-07-09 10:57 ` Krzysztof Halasa
2006-07-07 21:59 ` Linus Torvalds
2006-07-07 22:06 ` Linus Torvalds
2006-07-08 20:49 ` Pavel Machek
2006-07-08 21:43 ` Linus Torvalds
2006-07-07 22:05 ` J.A. Magallón
2006-07-07 22:22 ` Chase Venters
2006-07-07 22:37 ` J.A. Magallón
2006-07-08 9:33 ` David Schwartz
2006-07-07 22:49 ` J.A. Magallón
2006-07-07 22:59 ` Vadim Lobanov
2006-07-07 23:18 ` Chase Venters
2006-07-07 23:36 ` Davide Libenzi
2006-07-07 22:09 ` Ingo Molnar
2006-07-08 7:36 ` Ingo Molnar
2006-07-07 20:39 ` Krzysztof Halasa
2006-07-07 23:06 ` Björn Steinbrink
2006-07-08 8:36 ` Avi Kivity
2006-07-06 19:32 ` Jan Engelhardt
2006-07-06 20:26 ` Jeremy Fitzhardinge
2006-07-06 20:55 ` Jan Engelhardt
2006-07-06 21:07 ` Linus Torvalds
2006-07-06 19:56 ` Linus Torvalds
2006-07-06 20:34 ` Linus Torvalds
2006-07-08 22:50 ` Ralf Baechle
2006-07-09 3:09 ` Linus Torvalds
2006-07-09 3:07 ` Keith Owens
2006-07-09 3:29 ` Linus Torvalds
2006-07-09 3:43 ` Keith Owens
2006-07-09 3:58 ` Linus Torvalds
2006-07-09 6:13 ` David Miller
2006-07-09 14:28 ` Roman Zippel
2006-07-09 15:27 ` Linus Torvalds
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