From: Anton Blanchard <anton@samba.org>
To: Andrew Morton <akpm@osdl.org>
Cc: jes@trained-monkey.org, rmk+lkml@arm.linux.org.uk, ak@suse.de,
linux-kernel@vger.kernel.org, hch@infradead.org,
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 19:23:01 +1100 [thread overview]
Message-ID: <20060108082301.GN26499@krispykreme> (raw)
In-Reply-To: <20060108000021.588c6f5f.akpm@osdl.org>
> What's "unfair"? Mutexes are FIFO, as are x86 semaphores.
The ppc64 semaphores dont force everyone into the slow path under
contention. So you could drop and pick up the semaphore even with
someone waiting. I thought thats how the new mutex code worked.
Anton
next prev parent reply other threads:[~2006-01-08 8:30 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
2006-01-08 8:23 ` Anton Blanchard [this message]
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
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=20060108082301.GN26499@krispykreme \
--to=anton@samba.org \
--cc=ak@suse.de \
--cc=akpm@osdl.org \
--cc=alan@lxorguk.ukuu.org.uk \
--cc=arjan@infradead.org \
--cc=hch@infradead.org \
--cc=jes@trained-monkey.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc64-dev@ozlabs.org \
--cc=mingo@elte.hu \
--cc=nico@cam.org \
--cc=oleg@tv-sign.ru \
--cc=rmk+lkml@arm.linux.org.uk \
--cc=torvalds@osdl.org \
--cc=viro@ftp.linux.org.uk \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox