On 25/03/2019 11:53, Dario Faggioli wrote:
> On Sat, 2019-03-23 at 14:22 +0100, Juergen Gross wrote:
>> On 23/03/2019 03:32, Dario Faggioli wrote:
>>> To properly deal with offline CPUs, I think we can change the logic
>>> a
>>> little, i.e., we initialize the smt_idle mask to all-1 (all CPUs
>>> i
On Sat, 2019-03-23 at 14:22 +0100, Juergen Gross wrote:
> On 23/03/2019 03:32, Dario Faggioli wrote:
> > To properly deal with offline CPUs, I think we can change the logic
> > a
> > little, i.e., we initialize the smt_idle mask to all-1 (all CPUs
> > idle),
> > and we also make sure that we set th
On 23/03/2019 03:32, Dario Faggioli wrote:
> On Fri, 2019-03-22 at 10:04 +0100, Juergen Gross wrote:
>> Credit2's smt_idle_mask_set() and smt_idle_mask_clear() are used to
>> identify idle cores where vcpus can be moved to. A core is thought to
>> be idle when all siblings are known to have the idl
On Sat, 2019-03-23 at 03:32 +0100, Dario Faggioli wrote:
> On Fri, 2019-03-22 at 10:04 +0100, Juergen Gross wrote:
> > This problem can be solved by and-ing the core's sibling cpumask
> > with
> > the runqueue's active mask before doing the idle test.
> >
>
> Therefore, I'm a bit reluctant at add
On Fri, 2019-03-22 at 10:04 +0100, Juergen Gross wrote:
> Credit2's smt_idle_mask_set() and smt_idle_mask_clear() are used to
> identify idle cores where vcpus can be moved to. A core is thought to
> be idle when all siblings are known to have the idle vcpu running on
> them.
>
> Unfortunately the
Credit2's smt_idle_mask_set() and smt_idle_mask_clear() are used to
identify idle cores where vcpus can be moved to. A core is thought to
be idle when all siblings are known to have the idle vcpu running on
them.
Unfortunately the information of a vcpu running on a cpu is per
runqueue. So in case
