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

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Date:	Mon, 18 Apr 2016 14:04:26 +0000
From:	KY Srinivasan <kys@...rosoft.com>
To:	Vitaly Kuznetsov <vkuznets@...hat.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Haiyang Zhang" <haiyangz@...rosoft.com>,
	"Alex Ng (LIS)" <alexng@...rosoft.com>,
	"Cathy Avery" <cavery@...hat.com>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>
Subject: RE: [PATCH 0/2] Drivers: hv: balloon: two memory hotplug fixes



> -----Original Message-----
> From: Vitaly Kuznetsov [mailto:vkuznets@...hat.com]
> Sent: Monday, April 18, 2016 5:59 AM
> To: KY Srinivasan <kys@...rosoft.com>
> Cc: linux-kernel@...r.kernel.org; Haiyang Zhang
> <haiyangz@...rosoft.com>; Alex Ng (LIS) <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?

No I have them. I will be sending these soon.

K. Y
> 
> >
> > 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