hotplug support for arch/arc/plat-eznps platform

From	"Ofer Levi(SW)" <oferle@mellanox.com>
Newsgroups	linux.kernel
Subject	hotplug support for arch/arc/plat-eznps platform
Date	2017-08-06 08:00 +0200
Message-ID	<ubmLv-6Is-1@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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I'm adding hot-plug support for the above arch and ran into performance issue with execution of 
partition_sched_domains ()  - About 0.5 sec per cpu, which is unacceptable with the arch supported 4k cpus.
To my limited understanding, on the plat-eznps arch, where each cpu is always running a single threaded process in 
isolation mode, the above call is not necessary,
Can you please confirm (or reject) my understanding? If I'm wrong short explanation will be appreciated.
If I'm correct, I will be grateful if you can point me to how to skip this call in a way acceptable by community.

Thank you.
-Ofer

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hotplug support for arch/arc/plat-eznps platform "Ofer Levi(SW)" <oferle@mellanox.com> - 2017-08-06 08:00 +0200
  Re: hotplug support for arch/arc/plat-eznps platform Peter Zijlstra <peterz@infradead.org> - 2017-08-07 10:40 +0200
    RE: hotplug support for arch/arc/plat-eznps platform "Ofer Levi(SW)" <oferle@mellanox.com> - 2017-08-07 15:50 +0200
      Re: hotplug support for arch/arc/plat-eznps platform Peter Zijlstra <peterz@infradead.org> - 2017-08-07 17:20 +0200
        RE: hotplug support for arch/arc/plat-eznps platform "Ofer Levi(SW)" <oferle@mellanox.com> - 2017-08-08 08:50 +0200
          Re: hotplug support for arch/arc/plat-eznps platform Peter Zijlstra <peterz@infradead.org> - 2017-08-08 12:20 +0200
            RE: hotplug support for arch/arc/plat-eznps platform "Ofer Levi(SW)" <oferle@mellanox.com> - 2017-08-09 17:20 +0200
              Re: hotplug support for arch/arc/plat-eznps platform Peter Zijlstra <peterz@infradead.org> - 2017-08-09 17:40 +0200
                RE: hotplug support for arch/arc/plat-eznps platform "Ofer Levi(SW)" <oferle@mellanox.com> - 2017-08-10 09:50 +0200
                Re: hotplug support for arch/arc/plat-eznps platform Peter Zijlstra <peterz@infradead.org> - 2017-08-10 11:20 +0200
                RE: hotplug support for arch/arc/plat-eznps platform "Ofer Levi(SW)" <oferle@mellanox.com> - 2017-08-10 14:00 +0200
                Re: hotplug support for arch/arc/plat-eznps platform Peter Zijlstra <peterz@infradead.org> - 2017-08-10 17:50 +0200

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