Messages in this thread | | | Date | Fri, 7 Dec 2012 10:16:08 -0800 | From | Tejun Heo <> | Subject | Re: [RFC PATCH v3 1/9] CPU hotplug: Provide APIs to prevent CPU offline from atomic context |
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Hello, again.
On Fri, Dec 07, 2012 at 09:57:24AM -0800, Tejun Heo wrote: > possible. Also, I think the right approach would be auditing each > get_online_cpus_atomic() callsites and figure out proper locking order > rather than implementing a construct this unusual especially as > hunting down the incorrect cases shouldn't be difficult given proper > lockdep annotation.
On the second look, it looks like you're implementing proper percpu_rwlock semantics as readers aren't supposed to induce circular dependency directly. Can you please work with Oleg to implement proper percpu-rwlock and use that for CPU hotplug rather than implementing it inside CPU hotplug?
Thanks.
-- tejun
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