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Date: Fri, 2 Feb 2007 07:56:46 -0800
From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To: Ingo Molnar <mingo@...e.hu>
Cc: linux-kernel@...r.kernel.org, tglx@...utronix.de,
dipankar@...ibm.com, tytso@...ibm.com, dvhltc@...ibm.com,
oleg@...sign.ru, twoerner.k@...il.com, josh@...edesktop.org,
billh@...ppy.monkey.org, nielsen.esben@...glemail.com,
corbet@....net
Subject: Re: [RFC PATCH -rt 1/2] RCU priority boosting that survives vicious testing
On Thu, Feb 01, 2007 at 09:23:33AM +0100, Ingo Molnar wrote:
>
> * Paul E. McKenney <paulmck@...ux.vnet.ibm.com> wrote:
>
> > Here is the RCU priority-boosting patch. Pretty close to the
> > http://lkml.org/lkml/2007/1/24/295 version. This patch prevents
> > preempted or blocked low-priority RCU readers from indefinitely
> > stalling RCU grace periods.
>
> thanks - i've applied both patches to -rt and it's looking good so far!
> Find a small cosmetic fix below.
Sorry for the %d noise! :-/
I will send another patch addressing Nigel's freeze_processes()
review comments.
Thanx, Paul
> Ingo
>
> Index: linux/kernel/rcupreempt.c
> ===================================================================
> --- linux.orig/kernel/rcupreempt.c
> +++ linux/kernel/rcupreempt.c
> @@ -489,7 +489,7 @@ void init_rcu_boost_late(void)
> rcu_boost_task = kthread_run(rcu_booster, NULL, "RCU Prio Booster");
> if (IS_ERR(rcu_boost_task)) {
> printk(KERN_ALERT
> - "Unable to create RCU Priority Booster, errno %d\n",
> + "Unable to create RCU Priority Booster, errno %ld\n",
> -PTR_ERR(rcu_boost_task));
>
> /*
-
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