Messages in this thread | | | Subject | RE: [PATCH v2 15/45] rcu: Use get/put_online_cpus_atomic() to prevent CPU offline | Date | Wed, 26 Jun 2013 15:29:40 +0100 | From | "David Laight" <> |
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> Once stop_machine() is gone from the CPU offline path, we won't be able > to depend on disabling preemption to prevent CPUs from going offline > from under us.
Could you use an rcu-like sequence so that disabling pre-emption would be enough?
Something like rebuilding the cpu list, then forcing yourself to run on all the cpu.
That would be far less intrusive.
David
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