From 17bdcf949d03306b308c5fb694849cd35f119807 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Mon, 11 Oct 2010 16:36:51 +0200 Subject: [PATCH] sched: Drop all load weight manipulation for RT tasks Load weights are for the CFS, they do not belong in the RT task. This makes all RT scheduling classes leave the CFS weights alone. This fixes a real bug as well: I noticed the following phonomena: a process elevated to SCHED_RR forks with SCHED_RESET_ON_FORK set, and the child is indeed SCHED_OTHER, and the niceval is indeed reset to 0. However the weight inserted by set_load_weight() remains at 0, giving the task insignificat priority. With this fix, the weight is reset to what the task had before being elevated to SCHED_RR/SCHED_FIFO. Cc: Lennart Poettering Cc: stable@kernel.org Signed-off-by: Linus Walleij Signed-off-by: Peter Zijlstra LKML-Reference: <1286807811-10568-1-git-send-email-linus.walleij@stericsson.com> Signed-off-by: Ingo Molnar --- kernel/sched.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/kernel/sched.c b/kernel/sched.c index 5f64fed56a44..728081a7ef1c 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -1855,12 +1855,6 @@ static void dec_nr_running(struct rq *rq) static void set_load_weight(struct task_struct *p) { - if (task_has_rt_policy(p)) { - p->se.load.weight = 0; - p->se.load.inv_weight = WMULT_CONST; - return; - } - /* * SCHED_IDLE tasks get minimal weight: */