linux-kernel - Re: [PATCH V4] x86/Hyper-V: Balloon up according to request page number

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Message-ID: <20200125214141.GK1706@sasha-vm>
Date:   Sat, 25 Jan 2020 16:41:41 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     Michael Kelley <mikelley@...rosoft.com>
Cc:     "lantianyu1986@...il.com" <lantianyu1986@...il.com>,
        KY Srinivasan <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Tianyu Lan <Tianyu.Lan@...rosoft.com>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        vkuznets <vkuznets@...hat.com>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Subject: Re: [PATCH V4] x86/Hyper-V: Balloon up according to request page
 number

On Tue, Jan 21, 2020 at 04:36:26AM +0000, Michael Kelley wrote:
>From: Tianyu Lan <Tianyu.Lan@...rosoft.com> Sent: Monday, January 20, 2020 7:49 PM
>>
>> Current code has assumption that balloon request memory size aligns
>> with 2MB. But actually Hyper-V doesn't guarantee such alignment. When
>> balloon driver receives non-aligned balloon request, it produces warning
>> and balloon up more memory than requested in order to keep 2MB alignment.
>> Remove the warning and balloon up memory according to actual requested
>> memory size.
>>
>> Fixes: f6712238471a ("hv: hv_balloon: avoid memory leak on alloc_error of 2MB memory
>> block")
>> Cc: stable@...r.kernel.org
>> Reviewed-by: Vitaly Kuznetsov <vkuznets@...hat.com>
>> Signed-off-by: Tianyu Lan <Tianyu.Lan@...rosoft.com>
>
>Reviewed-by: Michael Kelley <mikelley@...rosoft.com>

Queued up, thanks!

-- 
Thanks,
Sasha