linux-kernel - [patch] rcu: rcutorture suspend fix

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Date:	Fri, 22 Dec 2006 01:08:13 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Linus Torvalds <torvalds@...l.org>
Cc:	"Paul E. McKenney" <paulmck@...ibm.com>,
	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org
Subject: [patch] rcu: rcutorture suspend fix

Subject: [patch] rcu: rcutorture suspend fix
From: Ingo Molnar <mingo@...e.hu>

fix suspend hang: rcutorture threads need to be nofreeze.

Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 kernel/rcutorture.c |    3 +++
 1 file changed, 3 insertions(+)

Index: linux/kernel/rcutorture.c
===================================================================
--- linux.orig/kernel/rcutorture.c
+++ linux/kernel/rcutorture.c
@@ -522,6 +522,7 @@ rcu_torture_writer(void *arg)
 
 	VERBOSE_PRINTK_STRING("rcu_torture_writer task started");
 	set_user_nice(current, 19);
+	current->flags |= PF_NOFREEZE;
 
 	do {
 		schedule_timeout_uninterruptible(1);
@@ -561,6 +562,7 @@ rcu_torture_fakewriter(void *arg)
 
 	VERBOSE_PRINTK_STRING("rcu_torture_fakewriter task started");
 	set_user_nice(current, 19);
+	current->flags |= PF_NOFREEZE;
 
 	do {
 		schedule_timeout_uninterruptible(1 + rcu_random(&rand)%10);
@@ -591,6 +593,7 @@ rcu_torture_reader(void *arg)
 
 	VERBOSE_PRINTK_STRING("rcu_torture_reader task started");
 	set_user_nice(current, 19);
+	current->flags |= PF_NOFREEZE;
 
 	do {
 		idx = cur_ops->readlock();
-
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