Re: [PATCH 4.4 045/115] sched/deadline: Throttle a constrained deadline task activated after the deadline

Daniel Bristot de Oliveira
2018-01-19T12:16:10Z

On 01/19/2018 08:53 AM, Greg Kroah-Hartman wrote:
> On Fri, Jan 19, 2018 at 01:00:45AM +0000, Ben Hutchings wrote:
>> On Mon, 2017-12-18 at 16:48 +0100, Greg Kroah-Hartman wrote:
>>> 4.4-stable review patch.  If anyone has any objections, please let me
>>> know.
>>>
>>> ------------------
>>>
>>> From: Daniel Bristot de Oliveira <bristot@redhat.com>
>>>
>>>
>>> [ Upstream commit df8eac8cafce7d086be3bd5cf5a838fa37594dfb ]
>> [...]
>>
>> I think this needs another fix on top:
>>
>> commit ae83b56a56f8d9643dedbee86b457fa1c5d42f59
>> Author: Xunlei Pang <xlpang@redhat.com>
>> Date:   Wed May 10 21:03:37 2017 +0800
>>
>>     sched/deadline: Zero out positive runtime after throttling constrained tasks
>
> Now queued up, thanks.
>
>> There's another fix related to this, but it doesn't appear to fix a
>> regression and I don't know how critical it is:
>>
>> commit 3effcb4247e74a51f5d8b775a1ee4abf87cc089a
>> Author: Daniel Bristot de Oliveira <bristot@redhat.com>
>> Date:   Mon May 29 16:24:03 2017 +0200
>>
>>     sched/deadline: Use the revised wakeup rule for suspending constrained dl tasks
>
> I'll hold off on this one until someone actually asks for it, as it's a
> big change.
>
> thanks again for the review,

Hi,

This fix is also needed. Do you guys need some help in the backport? if
so, please let me know! I will be glad to help.

-- Daniel

>
> greg k-h
>