Tejun Heo 3fc1f1e27a
stop_machine: reimplement using cpu_stop ...
Reimplement stop_machine using cpu_stop. As cpu stoppers are
guaranteed to be available for all online cpus,
stop_machine_create/destroy() are no longer necessary and removed.
With resource management and synchronization handled by cpu_stop, the
new implementation is much simpler. Asking the cpu_stop to execute
the stop_cpu() state machine on all online cpus with cpu hotplug
disabled is enough.
stop_machine itself doesn't need to manage any global resources
anymore, so all per-instance information is rolled into struct
stop_machine_data and the mutex and all static data variables are
removed.
The previous implementation created and destroyed RT workqueues as
necessary which made stop_machine() calls highly expensive on very
large machines. According to Dimitri Sivanich, preventing the dynamic
creation/destruction makes booting faster more than twice on very
large machines. cpu_stop resources are preallocated for all online
cpus and should have the same effect.
Signed-off-by: Tejun Heo <tj@kernel.org >
Acked-by: Rusty Russell <rusty@rustcorp.com.au >
Acked-by: Peter Zijlstra <peterz@infradead.org >
Cc: Oleg Nesterov <oleg@redhat.com >
Cc: Dimitri Sivanich <sivanich@sgi.com >
2010-05-06 18:49:20 +02:00
2010-03-29 17:33:33 +01:00
2010-02-26 05:22:03 -08:00
2010-03-12 15:52:44 -08:00
2010-03-07 22:17:32 +01:00
2010-03-07 22:17:39 +01:00
2010-03-24 16:31:21 -07:00
2010-03-20 14:29:03 -07:00
2010-02-24 18:32:59 +01:00
2010-02-24 18:34:48 +01:00
2010-02-24 18:34:48 +01:00
2010-03-03 14:49:24 +00:00
2010-03-30 22:02:32 +09:00
2010-03-22 05:32:44 -04:00
2010-03-30 22:02:32 +09:00
2010-03-30 22:02:32 +09:00
2010-03-12 15:53:10 -08:00
2010-04-08 12:53:57 -04:00
2010-03-16 19:47:54 +00:00
2010-03-06 11:26:46 -08:00
2010-04-07 08:38:01 -07:00
2010-03-19 08:58:16 +01:00
2010-03-12 15:52:37 -08:00
2010-03-24 16:31:22 -07:00
2010-03-12 19:10:29 +01:00
2010-03-12 15:52:32 -08:00
2010-03-12 15:52:32 -08:00
2010-03-06 11:26:29 -08:00
2010-04-02 20:12:03 +02:00
2010-03-04 11:46:14 +01:00
2010-03-30 22:02:32 +09:00
2010-03-06 02:32:27 +00:00
2010-03-07 17:04:52 -08:00
2010-03-06 02:32:33 +00:00
2010-03-06 02:32:31 +00:00
2010-03-12 15:52:42 -08:00
2010-03-04 08:20:14 -08:00
2010-03-11 16:32:14 +01:00
2010-03-11 15:51:23 +01:00
2010-02-26 08:25:35 +01:00
2010-03-06 11:26:46 -08:00
2010-03-06 11:26:46 -08:00
2010-03-05 14:00:17 -08:00
2010-03-29 14:30:19 -07:00
2010-03-29 14:30:19 -07:00
2010-02-26 19:19:39 +02:00
2010-03-01 16:20:37 +10:00
2010-02-25 10:34:49 +01:00
2010-02-24 20:36:55 +01:00
2010-03-06 11:26:25 -08:00
2010-03-26 23:51:44 +01:00
2010-04-07 08:38:04 -07:00
2010-03-29 09:14:47 -07:00
2010-03-30 22:02:32 +09:00
2010-03-10 14:47:18 +01:00
2010-02-28 10:20:25 -08:00
2010-03-30 22:02:32 +09:00
2010-03-16 08:55:32 +01:00
2010-03-06 11:26:27 -08:00
2010-03-01 14:08:10 +00:00
2010-02-25 17:39:16 +01:00
2010-02-26 17:05:10 -08:00
2010-03-07 22:17:09 +01:00
2010-02-27 16:23:39 +01:00
2010-03-13 20:56:56 +01:00
2010-03-02 12:23:42 +01:00
2010-03-14 11:14:58 -07:00
2010-03-02 12:23:49 +01:00
2010-03-24 08:20:03 +01:00
2010-04-01 01:31:13 -07:00
2010-03-21 21:19:02 -07:00
2010-03-12 15:52:40 -08:00
2010-03-08 23:19:15 -08:00
2010-03-30 22:02:32 +09:00
2010-03-12 15:52:36 -08:00
2010-03-23 13:33:50 -07:00
2010-03-12 15:52:40 -08:00
2010-03-12 15:52:40 -08:00
2010-03-03 08:15:37 -08:00
2010-04-01 16:12:48 -07:00
2010-03-30 22:02:32 +09:00
2010-03-30 22:02:32 +09:00
2010-03-02 10:41:26 -08:00
2010-04-07 08:38:04 -07:00
2010-04-07 08:38:02 -07:00
2010-03-12 15:53:10 -08:00
2010-03-07 17:04:49 -08:00
2010-02-25 17:49:25 +01:00
2010-03-01 12:36:13 -03:00
2010-03-01 12:36:14 -03:00
2010-03-15 12:47:59 +01:00
2010-04-06 10:55:33 -04:00
2010-03-06 11:26:35 -08:00
2010-03-12 15:53:10 -08:00
2010-03-12 15:52:38 -08:00
2010-03-17 18:43:47 -07:00
2010-03-12 15:52:28 -08:00
2010-04-07 08:38:04 -07:00
2010-03-08 16:55:37 +01:00
2010-03-03 14:07:59 -05:00
2010-04-05 19:50:02 -07:00
2010-03-04 08:15:33 -08:00
2010-03-18 21:16:45 -07:00
2010-03-25 11:17:26 +01:00
2010-03-20 14:29:03 -07:00
2010-04-12 07:55:15 -04:00
2010-03-05 15:44:56 -05:00
2010-03-12 15:52:38 -08:00
2010-03-18 07:30:31 -06:00
2010-04-07 08:38:05 -07:00
2010-03-03 08:47:22 -08:00
2010-02-23 23:14:47 -08:00
2010-02-22 16:21:02 -08:00
2010-03-12 15:52:42 -08:00
2010-03-12 15:52:42 -08:00
2010-03-03 07:34:18 -08:00
2010-04-05 09:39:11 -07:00
2010-04-01 08:26:31 +02:00
2010-02-24 08:30:08 +01:00
2010-03-07 17:04:49 -08:00
2010-03-06 21:28:37 +01:00
2010-03-06 21:28:37 +01:00
2010-03-12 15:53:11 -08:00
2010-03-12 15:52:38 -08:00
2010-03-05 00:20:31 +01:00
2010-03-05 00:20:30 +01:00
2010-04-09 10:12:03 -07:00
2010-02-25 11:45:20 +01:00
2010-02-25 09:41:02 +01:00
2010-02-28 19:23:06 -08:00
2010-03-18 21:25:32 +01:00
2010-02-26 08:20:46 +01:00
2010-02-26 08:20:46 +01:00
2010-03-12 15:52:44 -08:00
2010-03-05 13:25:52 -05:00
2010-03-24 16:31:21 -07:00
2010-02-26 20:39:09 +01:00
2010-03-02 14:28:49 -05:00
2010-03-06 11:26:27 -08:00
2010-03-12 15:52:28 -08:00
2010-03-12 15:53:10 -08:00
2010-02-28 19:23:06 -08:00
2010-03-13 01:21:21 +01:00
2010-04-23 11:02:02 +02:00
2010-03-30 22:02:32 +09:00
2010-03-12 15:52:43 -08:00
2010-03-10 11:55:05 +09:00
2010-03-12 15:52:44 -08:00
2010-03-24 11:13:35 -07:00
2010-04-09 10:09:50 -07:00
2010-03-06 11:26:32 -08:00
2010-03-08 10:45:27 -08:00
2010-03-27 08:29:01 -07:00
2010-03-13 01:21:21 +01:00
2010-03-03 07:34:18 -08:00
2010-05-06 18:49:20 +02:00
2010-03-12 15:52:36 -08:00
2010-03-22 13:12:33 -07:00
2010-03-07 17:04:47 -08:00
2010-03-07 17:04:52 -08:00
2010-03-30 22:02:32 +09:00
2010-03-16 10:10:40 +01:00
2010-03-02 14:55:11 -08:00
2010-03-12 15:52:43 -08:00
2010-03-19 07:17:57 -07:00
2010-03-19 07:24:23 -07:00
2010-03-01 22:21:58 +11:00
2010-02-26 15:10:40 -03:00
2010-03-13 08:57:28 -06:00
2010-02-24 14:22:08 +10:30
2010-02-24 14:22:26 +10:30
2010-04-08 09:46:19 +09:30
2010-03-13 08:57:29 -06:00
2010-03-19 07:17:52 -07:00
2010-03-12 10:03:42 +01:00
2010-02-22 16:19:45 -08:00
3fc1f1e27a