Re: [win-pv-devel] [PATCH] Add some sensible default overrides

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

> -----Original Message-----
> From: win-pv-devel [mailto:win-pv-devel-bounces@xxxxxxxxxxxxxxxxxxxx] On
> Behalf Of Owen Smith
> Sent: 26 July 2018 09:22
> To: win-pv-devel@xxxxxxxxxxxxxxxxxxxx
> Cc: Owen Smith <owen.smith@xxxxxxxxxx>
> Subject: [win-pv-devel] [PATCH] Add some sensible default overrides
> 
> Without overrides, "max-ring-page-order" and "multi-queue-max-queues"
> use values that will consume large amounts of grant references.
> "max-ring-page-order" will default to 4 (16 pages per ring)
> "multi-queue-max-queues" will default to the lowest of guest vCPU count
> or backend's vCPU count.
> 
> Override "max-ring-page-order" to 1 (2 pages per ring) and
> "multi-queue-max-queues" to 2 (2 rings per block device)
> 
> Signed-off-by: Owen Smith <owen.smith@xxxxxxxxxx>

Acked-by: Paul Durrant <paul.durrant@xxxxxxxxxx>

> ---
>  src/xenvbd.inf | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/src/xenvbd.inf b/src/xenvbd.inf
> index 5220add..a6127a9 100644
> --- a/src/xenvbd.inf
> +++ b/src/xenvbd.inf
> @@ -102,6 +102,8 @@ HKR,"Parameters",,0x00000010
>  HKR,"Parameters","BusType",0x00010001,0x00000001
>  HKR,"Parameters\PnpInterface","5",0x00010001,0x00000001
>  HKR,"Parameters","RequestKey",0x00000000,%RequestKey%
> +HKR,"Parameters","max-ring-page-order",0x00010001,0x00000001
> +HKR,"Parameters","multi-queue-max-queues",0x00010001,0x00000002
> 
>  [XenVbd_Inst.CoInstallers]
>  CopyFiles=CoInst_CopyFiles
> --
> 2.16.2.windows.1
> 
> 
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