From: yodaiken@fsmlabs.com
To: David Howells <dhowells@cambridge.redhat.com>
Cc: Linus Torvalds <torvalds@transmeta.com>,
Andrew Morton <andrewm@uow.edu.au>, Ben LaHaise <bcrl@redhat.com>,
David Howells <dhowells@redhat.com>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: rw_semaphores
Date: Mon, 16 Apr 2001 08:39:12 -0600 [thread overview]
Message-ID: <20010416083912.C4036@hq.fsmlabs.com> (raw)
In-Reply-To: <Pine.LNX.4.31.0104092242320.11520-100000@penguin.transmeta.com> <8623.986888854@warthog.cambridge.redhat.com>
In-Reply-To: <8623.986888854@warthog.cambridge.redhat.com>; from dhowells@cambridge.redhat.com on Tue, Apr 10, 2001 at 08:47:34AM +0100
On Tue, Apr 10, 2001 at 08:47:34AM +0100, David Howells wrote:
>
> Since you're willing to use CMPXCHG in your suggested implementation, would it
> make it make life easier if you were willing to use XADD too?
>
> Plus, are you really willing to limit the number of readers or writers to be
> 32767? If so, I think I can suggest a way that limits it to ~65535 apiece
> instead...
I'm trying to imagine a case where 32,000 sharing a semaphore was anything but a
major failure and I can't. To me: the result of an attempt by the 32,768th locker
should be a kernel panic. Is there a reasonable scenario where this is wrong?
>
> David
> -
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--
---------------------------------------------------------
Victor Yodaiken
Finite State Machine Labs: The RTLinux Company.
www.fsmlabs.com www.rtlinux.com
next prev parent reply other threads:[~2001-04-16 14:37 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <3AD0FD0F.9B0C47FD@uow.edu.au>
2001-04-09 3:08 ` rw_semaphores Linus Torvalds
2001-04-09 4:18 ` rw_semaphores Linus Torvalds
2001-04-09 13:55 ` rw_semaphores Ben LaHaise
2001-04-10 2:41 ` rw_semaphores Tachino Nobuhiro
2001-04-10 5:43 ` rw_semaphores Linus Torvalds
2001-04-10 6:33 ` rw_semaphores Tachino Nobuhiro
2001-04-10 7:47 ` rw_semaphores David Howells
2001-04-10 18:02 ` [PATCH] i386 rw_semaphores fix David Howells
2001-04-10 19:42 ` Linus Torvalds
2001-04-10 19:56 ` x86 cpu configuration (was: Re: [PATCH] i386 rw_semaphores fix) Jeff Garzik
2001-04-10 21:58 ` Alan Cox
2001-04-10 20:05 ` [PATCH] i386 rw_semaphores fix Andi Kleen
2001-04-10 20:16 ` Linus Torvalds
2001-04-10 22:00 ` Alan Cox
2001-04-11 0:00 ` Andi Kleen
2001-04-11 0:13 ` David Weinehall
2001-04-11 0:20 ` Andi Kleen
2001-04-11 0:56 ` David Weinehall
2001-04-11 1:04 ` Andi Kleen
2001-04-11 12:32 ` Alan Cox
2001-04-11 0:55 ` Linus Torvalds
2001-04-11 1:07 ` Andi Kleen
2001-04-11 1:12 ` Linus Torvalds
2001-04-11 1:23 ` Andi Kleen
2001-04-11 12:36 ` Alan Cox
2001-04-11 18:05 ` H. Peter Anvin
2001-04-11 12:28 ` Alan Cox
2001-04-11 18:06 ` H. Peter Anvin
2001-04-11 22:06 ` Alan Cox
2001-04-11 22:42 ` H. Peter Anvin
2001-04-11 22:55 ` Alan Cox
2001-04-10 21:57 ` Alan Cox
2001-04-11 0:40 ` Tim Wright
2001-04-11 7:38 ` David Howells
2001-04-11 12:24 ` Maciej W. Rozycki
2001-04-11 12:57 ` [PATCH] 2nd try: " David Howells
2001-04-11 16:37 ` [PATCH] 3rd " David Howells
2001-04-11 21:41 ` [PATCH] 4th " David Howells
2001-04-12 18:16 ` Andrew Morton
2001-04-11 23:00 ` [PATCH] 3rd " Anton Blanchard
2001-04-12 15:06 ` [PATCH] i386 rw_semaphores, general abstraction patch David Howells
2001-04-11 16:56 ` [PATCH] i386 rw_semaphores fix Andrew Morton
2001-04-11 17:36 ` David Howells
2001-04-11 18:41 ` Linus Torvalds
2001-04-11 21:27 ` David Howells
2001-04-16 14:39 ` yodaiken [this message]
2001-04-16 14:56 ` rw_semaphores Alan Cox
2001-04-16 17:05 ` rw_semaphores Linus Torvalds
2001-04-16 17:34 ` rw_semaphores yodaiken
2001-04-16 17:26 ` rw_semaphores Andrew Morton
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