On Fri, 2019-12-13 at 03:50:35 UTC, Michael Ellerman wrote:
> From: Srikar Dronamraju
>
> With commit 247f2f6f3c70 ("sched/core: Don't schedule threads on
> pre-empted vCPUs"), the scheduler avoids preempted vCPUs to schedule
> tasks on wakeup. This leads to wrong choice of CPU, which in-turn
>
Srikar Dronamraju writes:
> * Michael Ellerman [2019-12-13 14:50:35]:
>
>> Waiman Long suggested using static_keys.
>>
>> Fixes: 247f2f6f3c70 ("sched/core: Don't schedule threads on pre-empted
>> vCPUs")
>> Cc: sta...@vger.kernel.org # v4.18+
>> Reported-by: Parth Shah
>> Reported-by: Ihor
* Michael Ellerman [2019-12-13 14:50:35]:
> Waiman Long suggested using static_keys.
>
> Fixes: 247f2f6f3c70 ("sched/core: Don't schedule threads on pre-empted vCPUs")
> Cc: sta...@vger.kernel.org # v4.18+
> Reported-by: Parth Shah
> Reported-by: Ihor Pasichnyk
> Tested-by: Juri Lelli
>
From: Srikar Dronamraju
With commit 247f2f6f3c70 ("sched/core: Don't schedule threads on
pre-empted vCPUs"), the scheduler avoids preempted vCPUs to schedule
tasks on wakeup. This leads to wrong choice of CPU, which in-turn
leads to larger wakeup latencies. Eventually, it leads to performance
