linux-kernel - RE: [PATCH v3 1/1] Create debugfs file with hyper-v balloon usage information

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Message-ID: <BY3PR21MB30335CDAD39F927427DEF4EAD7869@BY3PR21MB3033.namprd21.prod.outlook.com>
Date:   Tue, 12 Jul 2022 16:24:12 +0000
From:   "Michael Kelley (LINUX)" <mikelley@...rosoft.com>
To:     Alexander Atanasov <alexander.atanasov@...tuozzo.com>,
        KY Srinivasan <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>
CC:     "kernel@...nvz.org" <kernel@...nvz.org>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v3 1/1] Create debugfs file with hyper-v balloon usage
 information

From: Alexander Atanasov <alexander.atanasov@...tuozzo.com> Sent: Monday, July 11, 2022 11:18 AM
> 
> Allow the guest to know how much it is ballooned by the host.
> It is useful when debugging out of memory conditions.
> 
> When host gets back memory from the guest it is accounted
> as used memory in the guest but the guest have no way to know
> how much it is actually ballooned.
> 
> Expose current state, flags and max possible memory to the guest.
> While at it - fix a 10+ years old typo.
> 
> Signed-off-by: Alexander Atanasov <alexander.atanasov@...tuozzo.com>
> ---
>  drivers/hv/hv_balloon.c | 135 ++++++++++++++++++++++++++++++++++++++--
>  1 file changed, 129 insertions(+), 6 deletions(-)
> 
> V1->V2:
>  - Fix C&P errors
> V2->V3:
>  - Move computation to a separate funcion
>  - Remove ifdefs to reduce code clutter
> 
> This patch addresses your suggestions. Once again, sorry i have missed
> your email reply last time.
> 

Reviewed-by: Michael Kelley <mikelley@...rosoft.com>