On 15/02/18 11:33, Juri Lelli wrote:
> On 14/02/18 17:31, Juri Lelli wrote:
>
> [...]
>
> > Still grabbing it is a no-go, as do_sched_setscheduler calls
> > sched_setscheduler from inside an RCU read-side critical section.
>
> I was then actually thinking that trylocking might do.. not sure howe
On 14/02/18 17:31, Juri Lelli wrote:
[...]
> Still grabbing it is a no-go, as do_sched_setscheduler calls
> sched_setscheduler from inside an RCU read-side critical section.
I was then actually thinking that trylocking might do.. not sure however
if failing with -EBUSY in the contended case is f
On 14/02/18 08:33, Mathieu Poirier wrote:
> On 14 February 2018 at 04:27, Juri Lelli wrote:
> > On 14/02/18 11:49, Juri Lelli wrote:
> >> On 14/02/18 11:36, Juri Lelli wrote:
> >> > Hi Mathieu,
> >> >
> >> > On 13/02/18 13:32, Mathieu Poirier wrote:
> >> > > No synchronisation mechanism exist betw
On 14 February 2018 at 04:27, Juri Lelli wrote:
> On 14/02/18 11:49, Juri Lelli wrote:
>> On 14/02/18 11:36, Juri Lelli wrote:
>> > Hi Mathieu,
>> >
>> > On 13/02/18 13:32, Mathieu Poirier wrote:
>> > > No synchronisation mechanism exist between the cpuset subsystem and calls
>> > > to function __
On 14/02/18 11:49, Juri Lelli wrote:
> On 14/02/18 11:36, Juri Lelli wrote:
> > Hi Mathieu,
> >
> > On 13/02/18 13:32, Mathieu Poirier wrote:
> > > No synchronisation mechanism exist between the cpuset subsystem and calls
> > > to function __sched_setscheduler(). As such it is possible that new r
On 14/02/18 11:36, Juri Lelli wrote:
> Hi Mathieu,
>
> On 13/02/18 13:32, Mathieu Poirier wrote:
> > No synchronisation mechanism exist between the cpuset subsystem and calls
> > to function __sched_setscheduler(). As such it is possible that new root
> > domains are created on the cpuset side wh
Hi Mathieu,
On 13/02/18 13:32, Mathieu Poirier wrote:
> No synchronisation mechanism exist between the cpuset subsystem and calls
> to function __sched_setscheduler(). As such it is possible that new root
> domains are created on the cpuset side while a deadline acceptance test
> is carried out i
No synchronisation mechanism exist between the cpuset subsystem and calls
to function __sched_setscheduler(). As such it is possible that new root
domains are created on the cpuset side while a deadline acceptance test
is carried out in __sched_setscheduler(), leading to a potential oversell
of CP
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