On 2020-04-08 09:00:13 [+0200], Juri Lelli wrote:
> Hi,
Hi,
> On 03/04/20 19:04, Sebastian Andrzej Siewior wrote:
> > Dear RT folks!
> >
> > I'm pleased to announce the v5.6.2-rt1 patch set.
> >
> > Changes since v5.4.28-rt19:
> >
> > - Rebase to v5.6.2
>
> I was reviewing the new set and I couldn't find v5.4.28-rt19
> 6dbbc833c99f ("mm: perform lru_add_drain_all() remotely"). Don't think
> it has been squashed either.
>
> Am I wrong? If not, why was that left out?
I was going to drop it from v5.4 but kept it last minute. I announced in
https://lkml.kernel.org/r/20200309171350.kjb3pdjazhxm2li2@xxxxxxxxxxxxx
that the problem it fixes is not limited to RT so we need a solution for
both config switches. The current plan for local-locks is not to work
cross CPU because it breaks the local_irq_save() / preempt_disable()
replacement which is something this patch relies on.
The worker triggered via vmstat_update() is also blocked if the user
task runs at an elevated priority for longer time.
> Thanks!
>
> Juri
Sebastian
