From: Aaron Lu <ziqianlu@bytedance.com>
To: "Bezdeka, Florian" <florian.bezdeka@siemens.com>
Cc: "kprateek.nayak@amd.com" <kprateek.nayak@amd.com>,
"liusongtang@bytedance.com" <liusongtang@bytedance.com>,
"dietmar.eggemann@arm.com" <dietmar.eggemann@arm.com>,
"zhouchuyi@bytedance.com" <zhouchuyi@bytedance.com>,
"bigeasy@linutronix.de" <bigeasy@linutronix.de>,
"mgorman@suse.de" <mgorman@suse.de>,
"Kiszka, Jan" <jan.kiszka@siemens.com>,
"vincent.guittot@linaro.org" <vincent.guittot@linaro.org>,
"chengming.zhou@linux.dev" <chengming.zhou@linux.dev>,
"mingo@redhat.com" <mingo@redhat.com>,
"rostedt@goodmis.org" <rostedt@goodmis.org>,
"joshdon@google.com" <joshdon@google.com>,
"vschneid@redhat.com" <vschneid@redhat.com>,
"xii@google.com" <xii@google.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"peterz@infradead.org" <peterz@infradead.org>,
"bsegall@google.com" <bsegall@google.com>,
"juri.lelli@redhat.com" <juri.lelli@redhat.com>
Subject: Re: [PATCH v3 3/5] sched/fair: Switch to task based throttle model
Date: Thu, 4 Sep 2025 16:40:56 +0800 [thread overview]
Message-ID: <20250904084056.GF42@bytedance> (raw)
In-Reply-To: <bb0f7d900a7e50d173ad462c6ed9f64a4b567785.camel@siemens.com>
Hi Florian,
On Thu, Sep 04, 2025 at 07:33:03AM +0000, Bezdeka, Florian wrote:
> Hi Aaron,
>
> On Wed, 2025-09-03 at 19:35 +0800, Aaron Lu wrote:
> >
> > > [..snip..]
> > > >
> >
> > Just want to add that with the above diff applied, I also tested
> > songtang's stress test[0] and Jan's rt deadlock reproducer[1] and didn't
> > see any problem.
>
> Thanks a lot for taking the reproducer into account. But: To trigger
> PREEMPT_RT needs to be enabled, otherwise the rwlock in the epoll
> infrastructure (that we highly stress) won't sleep. Just to be sure:
> PREEMPT_RT was enabled on your end?
>
Yes, understood.
I've PREEMPT_RT enabled when running Jan's rt deadlock reproducer. I
also run base and make sure there is hung happened in base before
testing this series. Normally, base would hung in 2 minutes and when
testing this series, I'll give it 5 minutes to see if anything abnormal
happened.
> >
> > [0]: https://lore.kernel.org/lkml/20250715072218.GA304@bytedance/
> > [1]: https://lore.kernel.org/all/7483d3ae-5846-4067-b9f7-390a614ba408@siemens.com/
next prev parent reply other threads:[~2025-09-04 8:41 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-15 7:16 [PATCH v3 0/5] Defer throttle when task exits to user Aaron Lu
2025-07-15 7:16 ` [PATCH v3 1/5] sched/fair: Add related data structure for task based throttle Aaron Lu
2025-07-15 7:16 ` [PATCH v3 2/5] sched/fair: Implement throttle task work and related helpers Aaron Lu
2025-07-15 7:16 ` [PATCH v3 3/5] sched/fair: Switch to task based throttle model Aaron Lu
2025-07-15 23:29 ` kernel test robot
2025-07-16 6:57 ` Aaron Lu
2025-07-16 7:40 ` Philip Li
2025-07-16 11:15 ` [PATCH v3 update " Aaron Lu
2025-07-16 11:27 ` [PATCH v3 " Peter Zijlstra
2025-07-16 15:20 ` kernel test robot
2025-07-17 3:52 ` Aaron Lu
2025-07-23 8:21 ` Oliver Sang
2025-07-23 10:08 ` Aaron Lu
2025-08-08 9:12 ` Valentin Schneider
2025-08-08 10:13 ` Aaron Lu
2025-08-08 11:45 ` Valentin Schneider
2025-08-12 8:48 ` Aaron Lu
2025-08-14 15:54 ` Valentin Schneider
2025-08-15 9:30 ` Aaron Lu
2025-08-22 11:07 ` Aaron Lu
2025-09-03 7:14 ` Aaron Lu
2025-09-03 9:11 ` K Prateek Nayak
2025-09-03 10:11 ` Aaron Lu
2025-09-03 10:31 ` K Prateek Nayak
2025-09-03 11:35 ` Aaron Lu
2025-09-04 7:33 ` Bezdeka, Florian
2025-09-04 8:26 ` K Prateek Nayak
2025-09-04 8:40 ` Aaron Lu [this message]
2025-08-28 3:50 ` Aaron Lu
2025-08-17 8:50 ` Chen, Yu C
2025-08-18 2:50 ` Aaron Lu
2025-08-18 3:10 ` Chen, Yu C
2025-08-18 3:12 ` Aaron Lu
2025-07-15 7:16 ` [PATCH v3 4/5] sched/fair: Task based throttle time accounting Aaron Lu
2025-08-18 14:57 ` Valentin Schneider
2025-08-19 9:34 ` Aaron Lu
2025-08-19 14:09 ` Valentin Schneider
2025-08-26 14:10 ` Michal Koutný
2025-08-27 15:16 ` Valentin Schneider
2025-08-28 6:06 ` Aaron Lu
2025-08-26 9:15 ` Aaron Lu
2025-07-15 7:16 ` [PATCH v3 5/5] sched/fair: Get rid of throttled_lb_pair() Aaron Lu
2025-07-15 7:22 ` [PATCH v3 0/5] Defer throttle when task exits to user Aaron Lu
2025-08-01 14:31 ` Matteo Martelli
2025-08-04 7:52 ` Aaron Lu
2025-08-04 11:18 ` Valentin Schneider
2025-08-04 11:56 ` Aaron Lu
2025-08-08 16:37 ` Matteo Martelli
2025-08-04 8:51 ` K Prateek Nayak
2025-08-04 11:48 ` Aaron Lu
2025-08-27 14:58 ` Valentin Schneider
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