From: Mike Galbraith <efault@gmx.de>
To: Ingo Molnar <mingo@elte.hu>, Andrew Morton <akpm@osdl.org>
Cc: lkml <linux-kernel@vger.kernel.org>,
Peter Williams <pwil3058@bigpond.net.au>,
Nick Piggin <nickpiggin@yahoo.com.au>,
Con Kolivas <kernel@kolivas.org>
Subject: Re: [patch 2.6.16-mm2 4/9] sched throttle tree extract - remove kthread barrier
Date: Sat, 01 Apr 2006 10:51:34 +0200 [thread overview]
Message-ID: <1143881494.7617.32.camel@homer> (raw)
In-Reply-To: <1143881058.7617.24.camel@homer>
This patch removes the last barrier between a normal task using dynamic
priorities and kthreads using the same. In testing, this separation has
proven to be unnecessary.
Signed-off-by: Mike Galbraith <efault@gmx.de>
--- linux-2.6.16-mm2/kernel/sched.c-3.remove_IO_barrier 2006-04-01 08:57:40.000000000 +0200
+++ linux-2.6.16-mm2/kernel/sched.c 2006-04-01 09:01:54.000000000 +0200
@@ -865,13 +865,13 @@ static int recalc_task_prio(task_t *p, u
if (likely(sleep_time > 0)) {
/*
- * User tasks that sleep a long time are categorised as
- * idle. They will only have their sleep_avg increased to a
+ * Tasks that sleep a long time are categorised as idle.
+ * They will only have their sleep_avg increased to a
* level that makes them just interactive priority to stay
* active yet prevent them suddenly becoming cpu hogs and
* starving other processes.
*/
- if (p->mm && sleep_time > INTERACTIVE_SLEEP(p)) {
+ if (sleep_time > INTERACTIVE_SLEEP(p)) {
unsigned long ceiling;
ceiling = JIFFIES_TO_NS(MAX_SLEEP_AVG -
next prev parent reply other threads:[~2006-04-01 8:51 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-01 8:28 [patch 2.6.16-mm2 0/9] sched throttle tree extract Mike Galbraith
2006-04-01 8:33 ` [patch 2.6.16-mm2 1/9] sched throttle tree extract - ignore invalid timestamps Mike Galbraith
2006-04-01 8:38 ` [patch 2.6.16-mm2 2/9] sched throttle tree extract - fix potential task uninterruptible bug Mike Galbraith
2006-04-01 8:44 ` [patch 2.6.16-mm2 3/9] sched throttle tree extract - remove IO priority barrier Mike Galbraith
2006-04-01 8:51 ` Mike Galbraith [this message]
2006-04-01 8:59 ` [patch 2.6.16-mm2 5/9] sched throttle tree extract - correct idle sleep logic Mike Galbraith
2006-04-01 9:12 ` [patch 2.6.16-mm2 6/9] sched throttle tree extract - move division to slow path Mike Galbraith
2006-04-01 9:23 ` [patch 2.6.16-mm2 7/9] sched throttle tree extract - implement throttling Mike Galbraith
2006-04-01 9:26 ` [patch 2.6.16-mm2 8/9] sched throttle tree extract - maximize timeslice accounting Mike Galbraith
2006-04-01 9:31 ` [patch 2.6.16-mm2 9/9] sched throttle tree extract - export tunables Mike Galbraith
2006-04-05 17:38 ` [patch 2.6.16-mm2 10/9] sched throttle tree extract - kill interactive task feedback loop Mike Galbraith
2006-04-05 23:15 ` Con Kolivas
2006-04-06 4:10 ` Mike Galbraith
2006-04-06 4:29 ` Con Kolivas
2006-04-01 16:53 ` [patch 2.6.16-mm2 5/9] sched throttle tree extract - correct idle sleep logic Lee Revell
2006-04-01 18:00 ` Mike Galbraith
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