Messages in this thread | | | Date | Wed, 8 Feb 2017 09:06:47 -0600 (CST) | From | Christoph Lameter <> | Subject | Re: mm: deadlock between get_online_cpus/pcpu_alloc |
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On Tue, 7 Feb 2017, Thomas Gleixner wrote:
> > Yep. Hotplug events are pretty significant. Using stop_machine_XXXX() etc > > would be advisable and that would avoid the taking of locks and get rid of all the > > ocmplexity, reduce the code size and make the overall system much more > > reliable. > > Huch? stop_machine() is horrible and heavy weight. Don't go there, there > must be simpler solutions than that.
Inserting or removing hardware is a heavy process. This would help quite a bit with these issues for loops over active cpus.
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