[libvirt] [PATCH v2] qemu: Expose rx/tx_queue_size in qemu.conf too

Michal Privoznik mprivozn at redhat.com
Mon Feb 12 12:18:39 UTC 2018


On 02/12/2018 01:05 PM, Daniel P. Berrangé wrote:
> On Mon, Feb 12, 2018 at 12:44:52PM +0100, Martin Kletzander wrote:
>> On Thu, Feb 01, 2018 at 09:58:17AM -0500, John Ferlan wrote:
>>>
>>>
>>> On 02/01/2018 09:04 AM, Michal Privoznik wrote:
>>>> In 2074ef6cd4a2 and c56cdf259 (and friends) we've added two
>>>> attributes to virtio NICs: rx_queue_size and tx_queue_size.
>>>> However, sysadmins might want to set these on per-host basis but
>>>> don't necessarily have an access to domain XML (e.g. because they
>>>> are generated by some other app). So let's expose them under
>>
>> Define "sysadmins" here.  If there's a management app running that
>> covers some hosts, then the app is the sysadmin.  Who will be setting
>> these in the conf file?  Some person?  Manually?  I don't think so.  My
>> bet is that it will be the same mgmt app that generates the XML.  Or the
>> same person who deploys the app, but still manually.  If that app is
>> unable to have a default, then why should libvirt be?
> 
> IIUC, this feature came in as a request to solve a limitation that
> exists in OpenStack nova not having support for setting this feature
> for guest XML.
> 
> IMHO the right fix for that request is to address the feature gap
> in Nova, not add this to libvirt to workaround fact that Nova has
> not supported this yet.

Agreed. Lets revert the commit. Sorry for the noise.

Michal




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