diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2011-06-15 12:36:06 +0200 |
|---|---|---|
| committer | Clark Williams <williams@redhat.com> | 2011-12-28 16:25:39 -0600 |
| commit | 77b32e1656bd7492bf3268900b44393ebb1ccd8e (patch) | |
| tree | 47e45320e3b653d696ae887a1f575531cfa3666b /net | |
| parent | 609570e5f2c33476c237f9bd6fbb3bc278de2e6c (diff) | |
hotplug: Lightweight get online cpus
get_online_cpus() is a heavy weight function which involves a global
mutex. migrate_disable() wants a simpler construct which prevents only
a CPU from going doing while a task is in a migrate disabled section.
Implement a per cpu lockless mechanism, which serializes only in the
real unplug case on a global mutex. That serialization affects only
tasks on the cpu which should be brought down.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'net')
0 files changed, 0 insertions, 0 deletions