Re: [PATCH] Replace kvm io delay pv-ops with linux magic

[Jeremy Fitzhardinge <jeremy@goop.org>]

On 11/20/09 07:58, Alexander Graf wrote:
>
> Am 19.11.2009 um 23:55 schrieb Jeremy Fitzhardinge <jeremy@goop.org>:
>
>> On 11/18/09 20:56, Alexander Graf wrote:
>>> Currently we use pv-ops to tell linux not to do anything on io_delay.
>>>
>>> While the basic idea is good IMHO, I don't see why we would need pv-ops
>>> for that. The io delay function already has a switch that can do
>>> nothing
>>> if you're so inclined.
>>>
>>> So here's a patch (stacked on top of the previous pv-ops series) that
>>> removes the io delay pv-ops hook and just sets the native io delay
>>> variable instead.
>>>
>>
>> Can you just get rid of the io_delay op altogether?  If KVM doesn't need
>> it, then nobody does.
>
> Sure, can do. That'd be a separate patch though.

Yep.  A patch each for VMI and Xen to remove the dependency, and a final
patch to remove the op.  Hm, looks like VMI has a specific ROM call for
io_delay; I wonder what it does.

    J