sched: Drop all load weight manipulation for RT tasks
authorLinus Walleij <linus.walleij@stericsson.com>
Mon, 11 Oct 2010 14:36:51 +0000 (16:36 +0200)
committerIngo Molnar <mingo@elte.hu>
Mon, 18 Oct 2010 16:41:59 +0000 (18:41 +0200)
commit17bdcf949d03306b308c5fb694849cd35f119807
tree5a84fcb6e691fb17b4c723fd8429e3ff2ce767e2
parent34f971f6f7988be4d014eec3e3526bee6d007ffa
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 <lennart@poettering.net>
Cc: stable@kernel.org
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1286807811-10568-1-git-send-email-linus.walleij@stericsson.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
kernel/sched.c