linux-kernel - Re: [PATCH 0/2] Drivers: hv: balloon: two memory hotplug fixes

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Message-ID: <87lh4b3wg5.fsf@vitty.brq.redhat.com>
Date:	Mon, 18 Apr 2016 14:58:34 +0200
From:	Vitaly Kuznetsov <vkuznets@...hat.com>
To:	"K. Y. Srinivasan" <kys@...rosoft.com>
Cc:	linux-kernel@...r.kernel.org,
	Haiyang Zhang <haiyangz@...rosoft.com>,
	Alex Ng <alexng@...rosoft.com>,
	Cathy Avery <cavery@...hat.com>, devel@...uxdriverproject.org
Subject: Re: [PATCH 0/2] Drivers: hv: balloon: two memory hotplug fixes

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

> Hi,
>
> I found an issue (crash) while testing memory hotplug on WS2016TP4 host.
> It should be easily reproducible with the following test sequence
>  (4.6-rc2):
>
> 1) Start a VM with 4 vCPUs in 4 NUMA nodes, 4096Mb of RAM.
> 2) Enable memory auto onlining with 
>    'echo online > /sys/devices/system/memory/auto_online_blocks'
> 3) Wait till hv_balloon driver finishes negotiation.
> 4) Increase memory to 8192Mb.
> 5) Increase memory to 10000Mb.
>
> The first patch in the series fixes the issue. While writing it I stumbled
> upon an unrelated issue which I fix with PATCH 2.

K. Y.,

it seems these two patches were lost. Should I resend them?

>
> Please review.
>
> Vitaly Kuznetsov (2):
>   Drivers: hv: balloon: don't crash when memory is added in non-sorted
>     order
>   Drivers: hv: balloon: reset host_specified_ha_region
>
>  drivers/hv/hv_balloon.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)

-- 
  Vitaly