Re: [PATCH v6 0/5] sched/deadline: fix cpusets bandwidth accounting

From: Tejun Heo
Date: Fri Jan 18 2019 - 11:17:45 EST


On Thu, Jan 17, 2019 at 09:47:34AM +0100, Juri Lelli wrote:
> Hi,
>
> v6 of a series of patches, originally authored by Mathieu, with the intent
> of fixing a long standing issue of SCHED_DEADLINE bandwidth accounting.
> As originally reported by Steve [1], when hotplug and/or (certain)
> cpuset reconfiguration operations take place, DEADLINE bandwidth
> accounting information is lost since root domains are destroyed and
> recreated.
>
> Mathieu's approach is based on restoring bandwidth accounting info on
> the newly created root domains by iterating through the (DEADLINE) tasks
> belonging to the configured cpuset(s).
>
> Apart from some minor refactoring needed to rebase the set on top of
> Waiman Long's cpuset for cgroup series (now mainline), two changes worth
> of notice:

Generally looks good to me but can you please ask Waiman to take a
look?

Thanks.

--
tejun