From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Helmut Buchsbaum <helmut.buchsbaum@gmail.com>,
linux-rt-users@vger.kernel.org, rostedt@goodmis.org,
tglx@linutronix.de
Subject: Re: Resend: 3.10.32-rt31: problem with "rcu: Eliminate softirq processing from rcutree"
Date: Tue, 18 Mar 2014 12:05:31 +0100 [thread overview]
Message-ID: <20140318110531.GC10448@linutronix.de> (raw)
In-Reply-To: <20140308200400.GA3334@linux.vnet.ibm.com>
* Paul E. McKenney | 2014-03-08 12:04:00 [-0800]:
>On Sat, Mar 08, 2014 at 08:08:35PM +0100, Helmut Buchsbaum wrote:
>> This is the correct point to tweak the system, I was not yet aware of!
>> Thanks a lot for the hint. I just enabled RCU_BOOST with its default
>> settings and the system runs smooth and stable again even in heavy
>> load situations. Maybe the default for RCU_BOOST should be set to Y on
>> systems using PREEMPT_RT_FULL ?
>
>I must defer to Sebastian on this, but seems like a good approach.
Hmm. There are a few ways to break an RT system. Afaik RCU_BOOST was
recommended even before this change.
Steven, tglx any opinion on that?
Another thing we could do is to register_shrinker() which is called
before OOM. But then boosting is simple enough.
> Thanx, Paul
Sebastian
next prev parent reply other threads:[~2014-03-18 11:05 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-06 19:05 Resend: 3.10.32-rt31: problem with "rcu: Eliminate softirq processing from rcutree" Helmut Buchsbaum
2014-03-07 16:21 ` Sebastian Andrzej Siewior
2014-03-07 17:04 ` Paul E. McKenney
2014-03-08 19:08 ` Helmut Buchsbaum
2014-03-08 19:19 ` Helmut Buchsbaum
2014-03-18 10:58 ` Sebastian Andrzej Siewior
2014-03-08 20:04 ` Paul E. McKenney
2014-03-18 11:05 ` Sebastian Andrzej Siewior [this message]
2014-03-20 14:50 ` Steven Rostedt
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