linux-kernel - Re: [PATCH v6 0/3] Drivers: hv: vmbus: use cpu_hotplug_enable/disable for CPU offlining prevention

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Date:	Mon, 13 Jul 2015 19:06:22 +0200
From:	Vitaly Kuznetsov <vkuznets@...hat.com>
To:	Ingo Molnar <mingo@...nel.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>
Cc:	devel@...uxdriverproject.org,
	"K. Y. Srinivasan" <kys@...rosoft.com>,
	Haiyang Zhang <haiyangz@...rosoft.com>,
	linux-kernel@...r.kernel.org, Dexuan Cui <decui@...rosoft.com>,
	Radim Krčmář <rkrcmar@...hat.com>,
	Greg KH <gregkh@...uxfoundation.org>
Subject: Re: [PATCH v6 0/3] Drivers: hv: vmbus: use cpu_hotplug_enable/disable for CPU offlining prevention

Vitaly Kuznetsov <vkuznets@...hat.com> writes:

> Changes since v5:
> - Split PATCH 1 into two (PATCH 1/3 and 3/3), rewrite changelogs. [Thomas
>   Gleixner]

Sorry for the ping but Greg won't probably take this into his tree
without some feedback on patches 1 and 3 from core kernel people. Could
you please take a look?

Thanks,

>
> Changes since v4:
> - In disable_nonboot_cpus() do cpu_hotplug_disabled++ unconditionally as
>   its users are doing enable_nonboot_cpus() on their failure paths.
>
> Changes since v3:
> - add WARN_ON when decreasing cpu_hotplug_disabled [Peter Zijlstra]
>
> Changes since v2:
> - Rebase on top of current Greg's char-misc-next tree [K. Y. Srinivasan]
>
> Changes since v1:
> - Make cpu_hotplug_disabled a counter [Radim Krčmář]
>
> Export cpu_hotplug_enable/cpu_hotplug_disable functions from cpu.c and use
> them instead of altering smp_ops.cpu_disable in Hyper-V vmbus module.
>
> Vitaly Kuznetsov (3):
>   cpu-hotplug: export cpu_hotplug_enable/cpu_hotplug_disable
>   Drivers: hv: vmbus: use cpu_hotplug_enable/disable
>   cpu-hotplug: convert cpu_hotplug_disabled to a counter
>
>  Documentation/power/suspend-and-cpuhotplug.txt |  6 ++--
>  drivers/hv/vmbus_drv.c                         | 38 +++-----------------------
>  kernel/cpu.c                                   | 24 ++++++++++------
>  3 files changed, 22 insertions(+), 46 deletions(-)

-- 
  Vitaly
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