lkml.org 
[lkml]   [2013]   [Jul]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH 3/4] PF: Provide additional direct page notification
From
Date

On 10.07.2013, at 12:42, Gleb Natapov wrote:

> On Wed, Jul 10, 2013 at 12:39:01PM +0200, Alexander Graf wrote:
>>
>> On 09.07.2013, at 18:01, Christian Borntraeger wrote:
>>
>>> On 09/07/13 15:56, Dominik Dingel wrote:
>>>> By setting a Kconfig option, the architecture can control when
>>>> guest notifications will be presented by the apf backend.
>>>> So there is the default batch mechanism, working as before, where the vcpu thread
>>>> should pull in this information. On the other hand there is now the direct
>>>> mechanism, this will directly push the information to the guest.
>>>>
>>>> Still the vcpu thread should call check_completion to cleanup leftovers,
>>>> that leaves most of the common code untouched.
>>>>
>>>> Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
>>>
>>> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
>>> for the "why". We want to use the existing architectured interface.
>>
>> Shouldn't this be a runtime option?
>>
> Why? What is the advantage of using sync delivery when HW can do it
> async?

What's the advantage of having an option at all then? Who selects it?


Alex



\
 
 \ /
  Last update: 2013-07-10 23:54    [W:0.044 / U:0.028 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site