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authorThomas Gleixner <tglx@linutronix.de>2012-07-16 10:42:36 +0000
committerThomas Gleixner <tglx@linutronix.de>2012-08-13 17:01:07 +0200
commitf97f8f06a49febbc3cb3635172efbe64ddc79700 (patch)
tree7917324eb3e1c36963a8c60c6a5601708b3ef208 /kernel/Makefile
parent2a1d446019f9a5983ec5a335b95e8593fdb6fa2e (diff)
smpboot: Provide infrastructure for percpu hotplug threads
Provide a generic interface for setting up and tearing down percpu threads. On registration the threads for already online cpus are created and started. On deregistration (modules) the threads are stoppped. During hotplug operations the threads are created, started, parked and unparked. The datastructure for registration provides a pointer to percpu storage space and optional setup, cleanup, park, unpark functions. These functions are called when the thread state changes. Each implementation has to provide a function which is queried and returns whether the thread should run and the thread function itself. The core code handles all state transitions and avoids duplicated code in the call sites. [ paulmck: Preemption leak fix ] Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/20120716103948.352501068@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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