linux-kernel - [PATCH][RSDL-mm 5/7] sched dont renice kernel threads

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Message-Id: <200703111501.56589.kernel@kolivas.org>
Date:	Sun, 11 Mar 2007 15:01:56 +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][RSDL-mm 5/7] 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 |    1 -
 1 file changed, 1 deletion(-)

Index: linux-2.6.21-rc3-mm2/kernel/workqueue.c
===================================================================
--- linux-2.6.21-rc3-mm2.orig/kernel/workqueue.c	2007-03-11 14:47:57.000000000 +1100
+++ linux-2.6.21-rc3-mm2/kernel/workqueue.c	2007-03-11 14:47:59.000000000 +1100
@@ -294,7 +294,6 @@ static int worker_thread(void *__cwq)
 	if (!cwq->wq->freezeable)
 		current->flags |= PF_NOFREEZE;
 
-	set_user_nice(current, -5);
 	/*
 	 * We inherited MPOL_INTERLEAVE from the booting kernel.
 	 * Set MPOL_DEFAULT to insure node local allocations.

-- 
-ck
-
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