From: Andrew Morton <akpm@osdl.org>
To: Anton Blanchard <anton@samba.org>
Cc: jschopp@austin.ibm.com, jes@trained-monkey.org,
rmk+lkml@arm.linux.org.uk, hch@infradead.org,
linux-kernel@vger.kernel.org, ak@suse.de, torvalds@osdl.org,
viro@ftp.linux.org.uk, linuxppc64-dev@ozlabs.org, mingo@elte.hu,
nico@cam.org, oleg@tv-sign.ru, alan@lxorguk.ukuu.org.uk,
arjan@infradead.org
Subject: Re: PowerPC fastpaths for mutex subsystem
Date: Sun, 8 Jan 2006 00:00:21 -0800 [thread overview]
Message-ID: <20060108000021.588c6f5f.akpm@osdl.org> (raw)
In-Reply-To: <20060108074356.GM26499@krispykreme>
Anton Blanchard <anton@samba.org> wrote:
>
>
> > Doens't this mean that the sped-up mutexes are still slower than semaphores?
>
> Wasnt most of the x86 mutex gain a result of going from fair to unfair
> operation? The current ppc64 semaphores are unfair.
>
What's "unfair"? Mutexes are FIFO, as are x86 semaphores.
next prev parent reply other threads:[~2006-01-08 8:01 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-04 14:41 [patch 00/21] mutex subsystem, -V14 Ingo Molnar
2006-01-04 23:45 ` Joel Schopp
2006-01-05 2:38 ` Nicolas Pitre
2006-01-05 2:51 ` Linus Torvalds
2006-01-05 3:21 ` Nick Piggin
2006-01-05 3:39 ` Anton Blanchard
2006-01-05 18:04 ` Jesse Barnes
2006-01-05 14:40 ` Ingo Molnar
2006-01-05 16:21 ` Linus Torvalds
2006-01-05 22:03 ` Ingo Molnar
2006-01-05 22:17 ` Linus Torvalds
2006-01-05 22:43 ` Ingo Molnar
2006-01-06 3:49 ` Keith Owens
2006-01-06 7:34 ` Denis Vlasenko
2006-01-05 14:35 ` Ingo Molnar
2006-01-05 16:42 ` Joel Schopp
2006-01-05 22:21 ` Ingo Molnar
2006-01-05 23:06 ` Joel Schopp
2006-01-05 23:26 ` Linus Torvalds
2006-01-05 23:36 ` Joel Schopp
2006-01-05 23:42 ` Ingo Molnar
2006-01-06 0:29 ` Olof Johansson
2006-01-07 17:49 ` PowerPC fastpaths for mutex subsystem Joel Schopp
2006-01-07 22:37 ` Andrew Morton
2006-01-08 7:43 ` Anton Blanchard
2006-01-08 8:00 ` Andrew Morton [this message]
2006-01-08 8:23 ` Anton Blanchard
2006-01-09 11:13 ` David Howells
2006-01-08 9:48 ` Ingo Molnar
2006-01-10 22:31 ` Joel Schopp
2006-01-10 23:09 ` Ingo Molnar
2006-01-11 10:52 ` Ingo Molnar
2006-01-11 17:44 ` Joel Schopp
2006-01-08 10:43 ` Ingo Molnar
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