Messages in this thread | | | Date | Wed, 13 Jun 2012 11:00:53 -0000 | From | Thomas Gleixner <> | Subject | [RFC patch 0/5] Per cpu thread hotplug infrastructure |
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The following series implements the infrastructure for parking and unparking kernel threads to avoid the full teardown and fork on cpu hotplug operations along with management infrastructure for hotplug and users.
I've converted the most obvious (and simple) users ksoftirqd and watchdog along with a driver (the latter is untested due to lack of hardware).
Looking at the other (ab)users of per cpu kernel threads:
- drivers/* should be rather trivial to convert all users
- RCU needs more thought, but I'm sure that Paul will figure it out in no time :)
The main issue with RCU are the per node threads, but it should be simple to extend the infrastructure to allow registration and handling of per node threads as well.
- workqueues. I did not even try to think about converting it. The hotplug related code in there causes strong feelings related to zombies and chainsaws. (See https://lwn.net/Articles/378036/)
Thanks,
tglx
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