linux-kernel - Re: [RFC PATCH -rt 1/2] RCU priority boosting that survives vicious testing

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Date:	Thu, 1 Feb 2007 09:23:33 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
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


* 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.

	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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