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authorSrivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>2012-05-24 19:46:41 +0530
committerIngo Molnar <mingo@kernel.org>2012-07-24 13:53:18 +0200
commit80d1fa6463d934969b7aebf04107fc133463f0f6 (patch)
tree9e86e50c41016e68df655890c93a3b200c6a3ec0 /usr
parentd35be8bab9b0ce44bed4b9453f86ebf64062721e (diff)
cpusets, hotplug: Implement cpuset tree traversal in a helper function
At present, the functions that deal with cpusets during CPU/Mem hotplug are quite messy, since a lot of the functionality is mixed up without clear separation. And this takes a toll on optimization as well. For example, the function cpuset_update_active_cpus() is called on both CPU offline and CPU online events; and it invokes scan_for_empty_cpusets(), which makes sense only for CPU offline events. And hence, the current code ends up unnecessarily traversing the cpuset tree during CPU online also. As a first step towards cleaning up those functions, encapsulate the cpuset tree traversal in a helper function, so as to facilitate upcoming changes. Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20120524141635.3692.893.stgit@srivatsabhat.in.ibm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
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