From: Mikael Pettersson <mikpe@it.uu.se>
To: dwalker@mvista.com, linux-kernel@vger.kernel.org
Cc: akpm@osdl.org, hzhong@gmail.com
Subject: Re: [PATCH] Profile likely/unlikely macros
Date: Tue, 25 Apr 2006 11:15:30 +0200 (MEST) [thread overview]
Message-ID: <200604250915.k3P9FUbY029686@harpo.it.uu.se> (raw)
On Mon, 24 Apr 2006 19:57:47 -0700, Daniel Walker wrote:
>+ if (likeliness->type & LIKELY_UNSEEN) {
>+ if (atomic_dec_and_test(&likely_lock)) {
>+ if (likeliness->type & LIKELY_UNSEEN) {
>+ likeliness->type &= (~LIKELY_UNSEEN);
>+ likeliness->next = likeliness_head;
>+ likeliness_head = likeliness;
>+ }
>+ }
>+ atomic_inc(&likely_lock);
>+ }
I'm pretty sure one can do this (prepending an element to a list)
w/o fiddling with locks by using CAS and looping until successful.
/Mikael
next reply other threads:[~2006-04-25 9:15 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-25 9:15 Mikael Pettersson [this message]
-- strict thread matches above, loose matches on Subject: below --
2006-04-25 2:57 Daniel Walker
2006-04-25 3:06 ` Andrew Morton
2006-04-25 3:17 ` Daniel Walker
2006-04-25 10:11 ` Nick Piggin
2006-04-25 18:06 ` Hua Zhong
2006-04-25 18:23 ` Daniel Walker
2006-04-26 1:08 ` Nick Piggin
2006-04-26 9:56 ` Jörn Engel
2006-04-26 10:07 ` Nick Piggin
2006-04-25 23:14 ` Chen, Kenneth W
2006-04-25 9:19 ` Andreas Mohr
2006-05-01 22:05 ` Roland Dreier
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=200604250915.k3P9FUbY029686@harpo.it.uu.se \
--to=mikpe@it.uu.se \
--cc=akpm@osdl.org \
--cc=dwalker@mvista.com \
--cc=hzhong@gmail.com \
--cc=linux-kernel@vger.kernel.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®