linux-kernel - [PATCH][ 1/5] sched: dont renice kernel threads

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Message-Id: <200703271208.47198.kernel@kolivas.org>
Date:	Tue, 27 Mar 2007 13:08:47 +1100
From:	Con Kolivas <kernel@...ivas.org>
To:	linux kernel mailing list <linux-kernel@...r.kernel.org>,
	ck list <ck@....kolivas.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: [PATCH][ 1/5] sched: dont renice kernel threads

The practice of renicing kernel threads to negative nice values is of
questionable benefit at best, and at worst leads to larger latencies when
kernel threads are busy on behalf of other tasks.

Signed-off-by: Con Kolivas <kernel@...ivas.org>
---

 kernel/workqueue.c |    2 --
 1 file changed, 2 deletions(-)

Index: linux-2.6.21-rc5-sd/kernel/workqueue.c
===================================================================
--- linux-2.6.21-rc5-sd.orig/kernel/workqueue.c	2007-03-26 11:03:31.000000000 +1000
+++ linux-2.6.21-rc5-sd/kernel/workqueue.c	2007-03-27 11:52:54.000000000 +1000
@@ -355,8 +355,6 @@ static int worker_thread(void *__cwq)
 	if (!cwq->freezeable)
 		current->flags |= PF_NOFREEZE;
 
-	set_user_nice(current, -5);
-
 	/* Block and flush all signals */
 	sigfillset(&blocked);
 	sigprocmask(SIG_BLOCK, &blocked, NULL);

-- 
-ck
-
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