From: ebiederm@xmission.com (Eric W. Biederman)
To: benh@kernel.crashing.org
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>,
ksummit-2008-discuss@lists.linux-foundation.org,
Linux Kernel list <linux-kernel@vger.kernel.org>,
Jeremy Kerr <jk@ozlabs.org>
Subject: Re: [Ksummit-2008-discuss] Delayed interrupt work, thread pools
Date: Thu, 03 Jul 2008 03:12:51 -0700 [thread overview]
Message-ID: <m1zlozmg2k.fsf@frodo.ebiederm.org> (raw)
In-Reply-To: <1215032409.21182.56.camel@pasglop> (Benjamin Herrenschmidt's message of "Thu, 03 Jul 2008 07:00:09 +1000")
Benjamin Herrenschmidt <benh@kernel.crashing.org> writes:
> The question is: is that significantly less overhead than just spawning
> a new full blown kernel thread ? enough to justify the complexity ? at
> the end of the day, it means allocating a stack (which on ppc64 is still
> 16K, I know it sucks)...
I looked at this a while ago. And right now kernel_thread is fairly light.
kthread_create has latency issues because we need to queue up a task on
our kernel thread spawning daemon, and let it fork the child. Needing
to go via the kthread spawning daemon didn't look fundamental, just something
that was a challenge to sort out.
Eric
next prev parent reply other threads:[~2008-07-03 13:12 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-01 12:45 Delayed interrupt work, thread pools Benjamin Herrenschmidt
2008-07-01 12:53 ` [Ksummit-2008-discuss] " Matthew Wilcox
2008-07-01 13:38 ` Benjamin Herrenschmidt
2008-07-01 13:02 ` Robin Holt
2008-07-02 1:39 ` Dean Nelson
2008-07-02 2:38 ` Benjamin Herrenschmidt
2008-07-02 2:47 ` Dave Chinner
2008-07-02 14:27 ` [Ksummit-2008-discuss] " Hugh Dickins
2008-07-02 4:22 ` Arjan van de Ven
2008-07-02 5:44 ` Benjamin Herrenschmidt
2008-07-02 11:02 ` Andi Kleen
2008-07-02 11:19 ` Leon Woestenberg
2008-07-02 11:24 ` Andi Kleen
2008-07-02 20:57 ` Benjamin Herrenschmidt
2008-07-02 14:11 ` James Bottomley
2008-07-02 20:00 ` Steven Rostedt
2008-07-02 20:22 ` James Bottomley
2008-07-02 20:28 ` Arjan van de Ven
2008-07-02 20:40 ` Steven Rostedt
2008-07-02 21:02 ` Benjamin Herrenschmidt
2008-07-02 21:00 ` Benjamin Herrenschmidt
2008-07-03 10:12 ` Eric W. Biederman [this message]
2008-07-03 10:31 ` Benjamin Herrenschmidt
2008-07-07 14:09 ` Chris Mason
2008-07-07 23:03 ` Benjamin Herrenschmidt
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=m1zlozmg2k.fsf@frodo.ebiederm.org \
--to=ebiederm@xmission.com \
--cc=James.Bottomley@HansenPartnership.com \
--cc=benh@kernel.crashing.org \
--cc=jk@ozlabs.org \
--cc=ksummit-2008-discuss@lists.linux-foundation.org \
--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