Re: [Qemu-devel] [PATCH V8 2/6] qmp: Create IOThrottle structure

[Eric Blake <eblake@redhat.com>]

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On 08/07/2017 07:37 AM, Pradeep Jagadeesh wrote:
> This patch enables qmp interfaces for the fsdev
> devices. This provides two interfaces one
> for querying info of all the fsdev devices. The second one
> to set the IO limits for the required fsdev device.
> 
> Signed-off-by: Pradeep Jagadeesh <pradeep.jagadeesh@huawei.com>
> Reviewed-by: Greg Kurz <groug@kaod.org>
> Reviewed-by: Eric Blake <eblake@redhat.com>
> Reviewed-by: Alberto Garcia <berto@igalia.com>
> ---
>  qapi/block-core.json | 76 ++-------------------------------------------
>  qapi/iothrottle.json | 88 ++++++++++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 91 insertions(+), 73 deletions(-)
>  create mode 100644 qapi/iothrottle.json

I'm wondering how much of this overlaps or even duplicates Manos'
efforts on making throttling a separate filter BDS.


> +++ b/qapi/iothrottle.json
> @@ -0,0 +1,88 @@
> +# -*- Mode: Python -*-
> +
> +##
> +# == QAPI IOThrottle definitions
> +##
> +
> +##
> +# @IOThrottle:
> +#
> +# A set of parameters describing IO throttling
> +#
> +# @id: The name or QOM path of the guest device (since: 2.8)

> +# Since: 2.10

Also, we've missed freeze for 2.10; this refactoring now belongs in 2.11.

> +##
> +{ 'struct': 'IOThrottle',
> +  'data': { '*id': 'str', 'bps': 'int', 'bps_rd': 'int',
> +            'bps_wr': 'int', 'iops': 'int', 'iops_rd': 'int', 'iops_wr': 'int',
> +            '*bps_max': 'int', '*bps_rd_max': 'int',
> +            '*bps_wr_max': 'int', '*iops_max': 'int',
> +            '*iops_rd_max': 'int', '*iops_wr_max': 'int',
> +            '*bps_max_length': 'int', '*bps_rd_max_length': 'int',
> +            '*bps_wr_max_length': 'int', '*iops_max_length': 'int',
> +            '*iops_rd_max_length': 'int', '*iops_wr_max_length': 'int',
> +            '*iops_size': 'int' } }
> 

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org


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