linux/kernel/sched
Peter Zijlstra 08bedae1d0 sched: Fix load avg vs. cpu-hotplug
Commit f319da0c68 ("sched: Fix load avg vs cpu-hotplug") was an
incomplete fix:

In particular, the problem is that at the point it calls
calc_load_migrate() nr_running := 1 (the stopper thread), so move the
call to CPU_DEAD where we're sure that nr_running := 0.

Also note that we can call calc_load_migrate() without serialization, we
know the state of rq is stable since its cpu is dead, and we modify the
global state using appropriate atomic ops.

Suggested-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1346882630.2600.59.camel@twins
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2012-09-13 16:52:05 +02:00
..
auto_group.c sched: Clean up parameter passing of proc_sched_autogroup_set_nice() 2012-03-02 12:23:49 +01:00
auto_group.h
clock.c
core.c sched: Fix load avg vs. cpu-hotplug 2012-09-13 16:52:05 +02:00
cpupri.c sched: Fix minor code style issues 2012-07-26 11:47:00 +02:00
cpupri.h
cputime.c sched: Move cputime code to its own file 2012-08-20 13:05:17 +02:00
debug.c sched/debug: Fix printing large integers on 32-bit platforms 2012-05-14 15:05:28 +02:00
fair.c sched: Fix nohz_idle_balance() 2012-09-13 16:52:03 +02:00
features.h sched: Remove AFFINE_WAKEUPS feature flag 2012-09-04 14:31:31 +02:00
idle_task.c sched/nohz: Rewrite and fix load-avg computation -- again 2012-07-05 20:58:13 +02:00
Makefile sched: Move cputime code to its own file 2012-08-20 13:05:17 +02:00
rt.c sched: Remove __ARCH_WANT_INTERRUPTS_ON_CTXSW 2012-09-13 16:52:04 +02:00
sched.h sched: Remove __ARCH_WANT_INTERRUPTS_ON_CTXSW 2012-09-13 16:52:04 +02:00
stats.c sched: Remove sched_switch 2012-01-27 13:28:53 +01:00
stats.h
stop_task.c sched: Fix migration thread runtime bogosity 2012-08-13 18:41:55 +02:00