Re: [Qemu-devel] [PULL 06/10] throttle: Add throttle group support

[Eric Blake <eblake@redhat.com>]

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On 06/12/2015 08:57 AM, Stefan Hajnoczi wrote:
> From: Alberto Garcia <berto@igalia.com>
> 
> The throttle group support use a cooperative round robin scheduling
> algorithm.
> 
> The principles of the algorithm are simple:
> - Each BDS of the group is used as a token in a circular way.
> - The active BDS computes if a wait must be done and arms the right
>   timer.
> - If a wait must be done the token timer will be armed so the token
>   will become the next active BDS.
> 
> Signed-off-by: Alberto Garcia <berto@igalia.com>
> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
> Message-id: f0082a86f3ac01c46170f7eafe2101a92e8fde39.1433779731.git.berto@igalia.com
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> ---

> +++ b/qapi/block-core.json
> @@ -1062,6 +1062,27 @@
>  #
>  # Change I/O throttle limits for a block drive.
>  #

> +#
> +# I/O limits can be disabled by setting all of them to 0. In this case
> +# the device will be removed from its group and the rest of its
> +# members will no be affected. The 'group' parameter is ignored.

s/no/not/
(can be done in a followup patch, since this is already a pull request)

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org


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