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Re: [patch V2 0/2] mm/memory_hotplug: Cure potential deadlocks vs. cpu hotplug lock

From	Thomas Gleixner <tglx@linutronix.de>
Newsgroups	linux.kernel
Subject	Re: [patch V2 0/2] mm/memory_hotplug: Cure potential deadlocks vs. cpu hotplug lock
Date	2017-07-06 08:40 +0200
Message-ID	<u08Ce-Kd-21@gated-at.bofh.it> (permalink)
References	<tZstj-6qV-9@gated-at.bofh.it> <u00v0-3uT-25@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Wed, 5 Jul 2017, Andrew Morton wrote:
> On Tue, 04 Jul 2017 11:32:32 +0200 Thomas Gleixner <tglx@linutronix.de> wrote:
> 
> > Andrey reported a potential deadlock with the memory hotplug lock and the
> > cpu hotplug lock.
> > 
> > The following series addresses this by reworking the memory hotplug locking
> > and fixing up the potential deadlock scenarios.
> 
> Do you think we should squeeze this into 4.13-rc1, or can we afford to
> take the more cautious route?

The deadlocks are real and the lockdep splats are triggering on Linus head,
so it should go into 4.13-rc1 if possible.

Thanks,

	tglx

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[patch V2 0/2] mm/memory_hotplug: Cure potential deadlocks vs. cpu  hotplug lock Thomas Gleixner <tglx@linutronix.de> - 2017-07-04 11:40 +0200
  [patch V2 1/2] mm: swap: Provide lru_add_drain_all_cpuslocked() Thomas Gleixner <tglx@linutronix.de> - 2017-07-04 11:40 +0200
    Re: [patch V2 1/2] mm: swap: Provide lru_add_drain_all_cpuslocked() Michal Hocko <mhocko@kernel.org> - 2017-07-04 13:00 +0200
      Re: [patch V2 1/2] mm: swap: Provide  lru_add_drain_all_cpuslocked() Thomas Gleixner <tglx@linutronix.de> - 2017-07-04 14:50 +0200
        Re: [patch V2 1/2] mm: swap: Provide lru_add_drain_all_cpuslocked() Michal Hocko <mhocko@kernel.org> - 2017-07-04 15:00 +0200
    Re: [patch V2 1/2] mm: swap: Provide lru_add_drain_all_cpuslocked() Vlastimil Babka <vbabka@suse.cz> - 2017-07-04 14:10 +0200
      Re: [patch V2 1/2] mm: swap: Provide  lru_add_drain_all_cpuslocked() Thomas Gleixner <tglx@linutronix.de> - 2017-07-04 14:40 +0200
  [patch V2 2/2] mm/memory-hotplug: Switch locking to a percpu rwsem Thomas Gleixner <tglx@linutronix.de> - 2017-07-04 11:40 +0200
    Re: [patch V2 2/2] mm/memory-hotplug: Switch locking to a percpu  rwsem Michal Hocko <mhocko@kernel.org> - 2017-07-04 13:00 +0200
    Re: [patch V2 2/2] mm/memory-hotplug: Switch locking to a percpu  rwsem Vlastimil Babka <vbabka@suse.cz> - 2017-07-04 14:20 +0200
      Re: [patch V2 2/2] mm/memory-hotplug: Switch locking to a percpu  rwsem Thomas Gleixner <tglx@linutronix.de> - 2017-07-04 15:00 +0200
    Re: [patch V2 2/2] mm/memory-hotplug: Switch locking to a percpu  rwsem Davidlohr Bueso <dave@stgolabs.net> - 2017-07-04 17:10 +0200
      Re: [patch V2 2/2] mm/memory-hotplug: Switch locking to a percpu  rwsem Davidlohr Bueso <dave@stgolabs.net> - 2017-07-04 17:30 +0200
        Re: [patch V2 2/2] mm/memory-hotplug: Switch locking to a percpu  rwsem Thomas Gleixner <tglx@linutronix.de> - 2017-07-04 17:40 +0200
          Re: [patch V2 2/2] mm/memory-hotplug: Switch locking to a percpu  rwsem Davidlohr Bueso <dave@stgolabs.net> - 2017-07-04 17:50 +0200
  Re: [patch V2 0/2] mm/memory_hotplug: Cure potential deadlocks vs.  cpu hotplug lock Andrew Morton <akpm@linux-foundation.org> - 2017-07-06 00:00 +0200
    Re: [patch V2 0/2] mm/memory_hotplug: Cure potential deadlocks vs.  cpu hotplug lock Thomas Gleixner <tglx@linutronix.de> - 2017-07-06 08:40 +0200

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