From: David Daney <ddaney@caviumnetworks.com>
To: Roland McGrath <roland@redhat.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Mark Wielaard <mjw@redhat.com>,
Stefan Hajnoczi <stefanha@gmail.com>,
"Frank Ch. Eigler" <fche@redhat.com>,
Julien Desfossez <julien.desfossez@polymtl.ca>,
dominique.toupin@ericsson.com, ltt-dev@lists.casi.polymtl.ca,
systemtap@sources.redhat.com, linux-kernel@vger.kernel.org,
Jason Baron <jbaron@redhat.com>,
hpa@zytor.com, rostedt@goodmis.org, mingo@elte.hu,
tglx@linutronix.de, andi@firstfloor.org, rth@redhat.com,
masami.hiramatsu.pt@hitachi.com, fweisbec@gmail.com,
avi@redhat.com, davem@davemloft.net, sam@ravnborg.org,
michael@ellerman.id.au, Peter Zijlstra <peterz@infradead.org>
Subject: Re: Porting "jump labels" to userspace
Date: Wed, 16 Feb 2011 12:17:28 -0800 [thread overview]
Message-ID: <4D5C30D8.8070107@caviumnetworks.com> (raw)
In-Reply-To: <20110216200449.1EB9618020E@magilla.sf.frob.com>
On 02/16/2011 12:04 PM, Roland McGrath wrote:
> IMHO there is not really so much to the in-kernel implementation that it's
> worth attempting to reuse the code in userland. Pretty much all the work
> is in the details of the implementation that would naturally differ a lot
> in a different context. If you understand the mechanism and the machine
> details, then implementing it well for a userland context is not a big deal
> and is cleaner to do from scratch than shoe-horning kernel-centric code
> into a wildly different context.
>
Good point.
Certainly the details of maintaining instruction cache coherency may be
different in userspace.
David Daney
next prev parent reply other threads:[~2011-02-16 20:17 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <4D5AA164.1050607@polymtl.ca>
[not found] ` <y0mvd0ltgba.fsf@fche.csb>
[not found] ` <AANLkTi=Nsy6fXE9=Njxs9LPHuohHzf=q5kD+fK765Rht@mail.gmail.com>
[not found] ` <1297853778.3224.90.camel@springer.wildebeest.org>
[not found] ` <20110216185056.CAD7B1806E0@magilla.sf.frob.com>
2011-02-16 20:00 ` Porting "jump labels" to userspace (was: Re: [ltt-dev] LTTng-UST vs SystemTap userspace tracing benchmarks) Mathieu Desnoyers
2011-02-16 20:04 ` Roland McGrath
2011-02-16 20:17 ` David Daney [this message]
2011-02-16 20:39 ` Porting "jump labels" to userspace Mathieu Desnoyers
2011-02-16 20:45 ` Thomas Gleixner
2011-02-16 21:42 ` Peter Zijlstra
2011-02-17 13:58 ` Ingo Molnar
2011-02-16 20:14 ` David Daney
2011-02-16 20:36 ` 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=4D5C30D8.8070107@caviumnetworks.com \
--to=ddaney@caviumnetworks.com \
--cc=andi@firstfloor.org \
--cc=avi@redhat.com \
--cc=davem@davemloft.net \
--cc=dominique.toupin@ericsson.com \
--cc=fche@redhat.com \
--cc=fweisbec@gmail.com \
--cc=hpa@zytor.com \
--cc=jbaron@redhat.com \
--cc=julien.desfossez@polymtl.ca \
--cc=linux-kernel@vger.kernel.org \
--cc=ltt-dev@lists.casi.polymtl.ca \
--cc=masami.hiramatsu.pt@hitachi.com \
--cc=mathieu.desnoyers@efficios.com \
--cc=michael@ellerman.id.au \
--cc=mingo@elte.hu \
--cc=mjw@redhat.com \
--cc=peterz@infradead.org \
--cc=roland@redhat.com \
--cc=rostedt@goodmis.org \
--cc=rth@redhat.com \
--cc=sam@ravnborg.org \
--cc=stefanha@gmail.com \
--cc=systemtap@sources.redhat.com \
--cc=tglx@linutronix.de \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.