From: Lee Revell <rlrevell@joe-job.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: "Paul E. McKenney" <paulmck@us.ibm.com>,
linux-kernel@vger.kernel.org, dipankar@in.ibm.com,
rusty@au1.ibm.com, bmark@us.ibm.com,
Thomas Gleixner <tglx@linutronix.de>,
Andrew Morton <akpm@osdl.org>
Subject: Re: [RFC,PATCH] Use RCU to protect tasklist for unicast signals
Date: Thu, 11 Aug 2005 22:00:56 -0400 [thread overview]
Message-ID: <1123812057.26878.9.camel@mindpipe> (raw)
In-Reply-To: <20050811095634.GA19342@elte.hu>
On Thu, 2005-08-11 at 11:56 +0200, Ingo Molnar wrote:
> > For the record, some shortcomings of this patch:
> >
> > o Needs lots more testing on more architectures.
> >
> > o Needs performance and stress testing.
> >
> > o Needs testing in Ingo's PREEMPT_RT environment.
>
> cool patch! I have integrated it into my PREEMPT_RT tree, and all it
> needed to boot was the patch below (doesnt affect the upstream kernel).
> Using the raw IRQ flag isnt an issue in the RCU code, all the affected
> codepaths are small and deterministic.
>
Ingo,
Doesn't this fix the longest latency we were seeing with
PREEMPT_DESKTOP, I don't have a trace handy but the upshot was "signal
delivery must remain atomic on !PREEMPT_RT"?
Lee
next prev parent reply other threads:[~2005-08-12 2:01 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-10 17:11 [RFC,PATCH] Use RCU to protect tasklist for unicast signals Paul E. McKenney
2005-08-11 9:56 ` Ingo Molnar
2005-08-11 14:14 ` Paul E. McKenney
2005-08-12 2:00 ` Lee Revell [this message]
2005-08-12 6:36 ` Ingo Molnar
2005-08-12 20:57 ` Paul E. McKenney
2005-08-11 17:14 ` Christoph Hellwig
2005-08-11 17:56 ` Paul E. McKenney
2005-08-11 18:00 ` Dipankar Sarma
2005-08-11 18:12 ` Dipankar Sarma
-- strict thread matches above, loose matches on Subject: below --
2005-08-11 12:16 Oleg Nesterov
2005-08-11 15:20 ` Paul E. McKenney
2005-08-12 1:56 ` Paul E. McKenney
2005-08-12 8:51 ` Oleg Nesterov
2005-08-12 15:42 ` Paul E. McKenney
2005-08-15 17:44 ` Paul E. McKenney
2005-08-16 8:14 ` Ingo Molnar
2005-08-16 11:56 ` Oleg Nesterov
2005-08-16 17:07 ` Paul E. McKenney
2005-08-17 1:48 ` Paul E. McKenney
2005-08-17 6:35 ` Ingo Molnar
2005-08-17 14:35 ` Oleg Nesterov
2005-08-17 21:19 ` Paul E. McKenney
2005-08-18 11:48 ` Oleg Nesterov
2005-08-19 1:29 ` Paul E. McKenney
2005-08-19 13:27 ` Oleg Nesterov
2005-08-19 18:34 ` Paul E. McKenney
2005-08-18 12:24 ` Oleg Nesterov
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