Files
kernel-tenderloin-3.0/include/linux
Peter Zijlstra 48c5ccae88 sched: Simplify cpu-hot-unplug task migration
While discussing the need for sched_idle_next(), Oleg remarked that
since try_to_wake_up() ensures sleeping tasks will end up running on a
sane cpu, we can do away with migrate_live_tasks().

If we then extend the existing hack of migrating current from
CPU_DYING to migrating the full rq worth of tasks from CPU_DYING, the
need for the sched_idle_next() abomination disappears as well, since
idle will be the only possible thread left after the migration thread
stops.

This greatly simplifies the hot-unplug task migration path, as can be
seen from the resulting code reduction (and about half the new lines
are comments).

Suggested-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1289851597.2109.547.camel@laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-11-18 13:27:46 +01:00
..
2010-10-30 08:31:35 -07:00
2010-10-15 21:18:59 +02:00
2010-10-26 14:51:00 -04:00
2010-10-30 08:45:43 -04:00
2010-11-10 14:54:09 +01:00
2010-11-10 14:54:09 +01:00
2010-11-10 14:54:09 +01:00
2010-10-25 21:18:20 -04:00
2010-10-25 08:02:40 -07:00
2010-10-22 15:55:22 +02:00
2010-10-21 14:47:59 +02:00
2010-10-28 17:22:16 -04:00
2010-10-25 14:11:37 -07:00
2010-10-23 22:49:32 +02:00
2010-10-12 16:53:37 +02:00
2010-11-15 22:40:38 +01:00
2010-11-15 22:40:38 +01:00
2010-10-26 16:52:08 -07:00
2010-10-07 14:08:55 +01:00
2010-10-28 17:22:13 -04:00
2010-10-22 15:34:12 -05:00
2010-11-12 07:55:32 -08:00
2010-10-21 21:18:54 -04:00
2010-10-25 21:24:15 -04:00
2010-10-28 09:08:47 -05:00
2010-10-26 16:52:05 -07:00
2010-10-12 16:53:34 +02:00
2010-10-04 21:10:52 +02:00
2010-10-04 21:10:52 +02:00
2010-10-01 17:18:59 -04:00
2010-10-07 18:48:49 -04:00
2010-10-15 12:45:44 +02:00
2010-10-17 20:03:03 -07:00
2010-10-17 20:03:06 -07:00
2010-10-24 15:07:11 -07:00
2010-11-12 07:55:32 -08:00
2010-10-29 04:16:31 -04:00
2010-10-25 21:18:20 -04:00
2010-10-27 18:03:16 -07:00
2010-10-05 00:29:48 -07:00
2010-10-30 12:12:50 +02:00
2010-10-20 03:02:23 -07:00
2010-10-21 15:44:13 +02:00
2010-10-27 17:28:36 +01:00
2010-10-07 14:08:55 +01:00
2010-10-21 04:11:07 -07:00
2010-10-22 10:20:04 -07:00
2010-11-09 14:36:23 -08:00
2010-10-26 16:52:03 -07:00
2010-10-22 10:16:43 -07:00
2010-11-08 12:28:32 -08:00
2010-10-26 16:52:14 -07:00