Re: [Qemu-devel] [PATCH v3 5/7] block: add throttle block filter driver

[Eric Blake <eblake@redhat.com>]

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On 08/03/2017 03:07 AM, Kevin Wolf wrote:
> Am 31.07.2017 um 11:54 hat Manos Pitsidianakis geschrieben:
>> block/throttle.c uses existing I/O throttle infrastructure inside a
>> block filter driver. I/O operations are intercepted in the filter's
>> read/write coroutines, and referred to block/throttle-groups.c
>>
>> The driver can be used with the syntax
>> -drive driver=throttle,file.filename=foo.qcow2, \
>>         limits.iops-total=...,throttle-group=bar
>>
>> The configuration flags and their semantics are identical to the
>> hardcoded throttling ones.
>>
>> A node can be created referring to an existing group, and will overwrite
>> its limits if any are specified, otherwise they are retained.
>>
>> Signed-off-by: Manos Pitsidianakis <el13635@mail.ntua.gr>
>> ---

>> +
>> +    .is_filter                          =   true,
>> +};
> 
> What about .bdrv_co_get_block_status?

And if so, do you want my byte-based block status to go in first?  (Our
two series conflict, so we need to pick who needs to rebase on top of
the other).

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


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