From: pbonzini@redhat.com (Paolo Bonzini)
Subject: [lttng-dev] [URCU PATCH 1/3] wfcqueue: implement concurrency-efficient queue
Date: Mon, 08 Oct 2012 18:33:15 +0200 [thread overview]
Message-ID: <5073004B.2050400@redhat.com> (raw)
In-Reply-To: <20121008161544.GB30083@Krystal>
Il 08/10/2012 18:15, Mathieu Desnoyers ha scritto:
> Hi Paolo,
>
> We actually already have those, they are just not described in this
> comment. I will fix this right away. By the way, you will notice the
> wording:
>
> + * Queue read operations "first" and "next", which are used by
> + * "for_each" iterations, need to be protected against concurrent
> + * "dequeue" and "splice" (for source queue) by the caller.
>
> Being the only one iterating on a queue with local head/tail after a
> splice operation is one way to provide mutual exclusion. Holding a lock
> is not the only way to achieve mutual exclusion.
Uh, I was confused by the _blocking suffix. But when used together with
splice you know it is not blocking---only the splice will block.
Paolo
next prev parent reply other threads:[~2012-10-08 16:33 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-02 14:13 [lttng-dev] [URCU PATCH 0/3] wait-free concurrent queues (wfcqueue) Mathieu Desnoyers
2012-10-02 14:14 ` [lttng-dev] [URCU PATCH 1/3] wfcqueue: implement concurrency-efficient queue Mathieu Desnoyers
2012-10-08 15:47 ` Paolo Bonzini
2012-10-08 16:15 ` Mathieu Desnoyers
2012-10-08 16:33 ` Paolo Bonzini [this message]
2012-10-08 18:10 ` Mathieu Desnoyers
2012-10-10 2:56 ` Lai Jiangshan
2012-10-10 4:50 ` Mathieu Desnoyers
2012-10-02 14:15 ` [lttng-dev] [URCU PATCH 2/3] wfcqueue test Mathieu Desnoyers
2012-10-02 14:16 ` [lttng-dev] [URCU PATCH 3/3] call_rcu: use wfcqueue, eliminate false-sharing Mathieu Desnoyers
2012-10-08 3:09 ` Lai Jiangshan
2012-10-08 14:49 ` Mathieu Desnoyers
2012-10-08 15:10 ` Paul E. McKenney
2012-10-08 16:03 ` Mathieu Desnoyers
2012-10-03 18:28 ` [lttng-dev] [rp] [URCU PATCH 0/3] wait-free concurrent queues (wfcqueue) Paul E. McKenney
2012-10-03 21:04 ` Mathieu Desnoyers
2012-10-04 18:51 ` Paul E. McKenney
2012-10-08 3:33 ` Lai Jiangshan
2012-10-08 15:07 ` Mathieu Desnoyers
2012-10-10 2:53 ` Lai Jiangshan
2012-10-10 4:59 ` Mathieu Desnoyers
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=5073004B.2050400@redhat.com \
--to=pbonzini@redhat.com \
/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