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| author | Anton Blanchard <anton@samba.org> | 2009-05-25 22:25:49 +0200 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-06-02 02:35:32 +0200 |
| commit | f8729e8531cd92e892dd85a3d10669834ad0b23c (patch) | |
| tree | 8e44e0dadbc7b7dc0aa1be7d68aed111cd7dcd41 /arch/.gitignore | |
| parent | therm_adt746x: Always clear hardware bit which inverts fan speed range. (diff) | |
| download | linux-f8729e8531cd92e892dd85a3d10669834ad0b23c.tar.xz linux-f8729e8531cd92e892dd85a3d10669834ad0b23c.zip | |
powerpc: Convert RTAS event scan from kernel thread to workqueue
RTAS event scan has to run across all cpus. Right now we use a kernel
thread and set_cpus_allowed but in doing so we wake up the previous cpu
unnecessarily.
Some ftrace output shows this:
previous cpu (2):
[002] 7.022331: sched_switch: task swapper:0 [140] ==> rtasd:194 [120]
[002] 7.022338: sched_switch: task rtasd:194 [120] ==> migration/2:9 [0]
[002] 7.022344: sched_switch: task migration/2:9 [0] ==> swapper:0 [140]
next cpu (3):
[003] 7.022345: sched_switch: task swapper:0 [140] ==> rtasd:194 [120]
[003] 7.022371: sched_switch: task rtasd:194 [120] ==> swapper:0 [140]
We can use schedule_delayed_work_on and avoid the unnecessary wakeup.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/.gitignore')
0 files changed, 0 insertions, 0 deletions