From: Marcelo Tosatti <mtosatti@redhat.com>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: linux-rt-users@vger.kernel.org,
Juri Lelli <juri.lelli@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
Frederic Weisbecker <frederic@kernel.org>
Subject: Re: [patch 2/2] mm: page_alloc: drain pages remotely
Date: Wed, 17 Jun 2020 07:11:36 -0300 [thread overview]
Message-ID: <20200617101136.GA392445@fuller.cnet> (raw)
In-Reply-To: <20200617074223.wtd5lsxbpvqvbxs7@linutronix.de>
On Wed, Jun 17, 2020 at 09:42:23AM +0200, Sebastian Andrzej Siewior wrote:
> On 2020-06-16 13:55:36 [-0300], Marcelo Tosatti wrote:
> > > We had this
> > > https://lore.kernel.org/linux-mm/20190424111208.24459-1-bigeasy@linutronix.de/
> >
> > Will reply to that thread. Do you want to refresh/resend that patchset or
> > should I?
>
> I don't plan to refresh/resend it because what we have now with local-locks
> in v5.8-rc1 works for RT.
If your application busy-spins with DPDK (such as FlexRAN does):
https://www.slideshare.net/LuminaNetworks/osn-bay-area-feb-2019-meetup-intel-5g-flexran-solution-131647692
Then v5.8-rc1 does not work, right? (remote pagevec locking + remote
draining would be necessary).
> I dropped that from RT in v5.4.26-rt17 so the previous release should have
> the last version of this. Please be aware that Joe Korty reported that
> this patch somehow breaks a workload for him. The report never made it
> to the list but he confirmed in
> https://lkml.kernel.org/r/20200330154110.GA2975@zipoli.concurrent-rt.com
OK, will see if i can reproduce it and assist in the pagevec locking
upstreaming effort.
Thanks!
>
> that is problem is gone with the removal of the patch.
>
> Sebastian
next prev parent reply other threads:[~2020-06-17 11:12 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-16 16:11 [patch 0/2] re-enable remote per-cpu-pages draining Marcelo Tosatti
2020-06-16 16:11 ` [patch 1/2] rt: add local_lock_on and local_lock_irqsave_on to locallock.h Marcelo Tosatti
2020-06-16 16:11 ` [patch 2/2] mm: page_alloc: drain pages remotely Marcelo Tosatti
2020-06-16 16:32 ` Sebastian Andrzej Siewior
2020-06-16 16:55 ` Marcelo Tosatti
2020-06-17 7:42 ` Sebastian Andrzej Siewior
2020-06-17 10:11 ` Marcelo Tosatti [this message]
2020-06-17 12:01 ` Sebastian Andrzej Siewior
2020-06-16 17:04 ` Marcelo Tosatti
2020-06-17 7:46 ` Sebastian Andrzej Siewior
2020-06-17 10:12 ` Marcelo Tosatti
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