From: Waiman Long <longman@redhat.com>
To: Juri Lelli <juri.lelli@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@kernel.org>, Qais Yousef <qyousef@layalina.io>,
Tejun Heo <tj@kernel.org>, Zefan Li <lizefan.x@bytedance.com>,
Johannes Weiner <hannes@cmpxchg.org>, Hao Luo <haoluo@google.com>
Cc: linux-kernel@vger.kernel.org, cgroups@vger.kernel.org,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Steven Rostedt <rostedt@goodmis.org>,
luca.abeni@santannapisa.it, claudio@evidence.eu.com,
tommaso.cucinotta@santannapisa.it, bristot@redhat.com,
mathieu.poirier@linaro.org,
Vincent Guittot <vincent.guittot@linaro.org>,
Wei Wang <wvw@google.com>, Rick Yiu <rickyiu@google.com>,
Quentin Perret <qperret@google.com>,
Heiko Carstens <hca@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Alexander Gordeev <agordeev@linux.ibm.com>,
Sudeep Holla <sudeep.holla@arm.com>
Subject: Re: [PATCH 6/7] cgroup/cpuset: Protect DL BW data against parallel cpuset_attach()
Date: Wed, 29 Mar 2023 12:05:20 -0400 [thread overview]
Message-ID: <0eae9e7c-8bfc-6e89-c4ad-e1cd40ec03b5@redhat.com> (raw)
In-Reply-To: <20230329160240.2093277-1-longman@redhat.com>
On 3/29/23 12:02, Waiman Long wrote:
> It is possible to have parallel attach operations to the same cpuset in
> progress. To avoid possible corruption of single set of DL BW data in
> the cpuset structure, we have to disallow parallel attach operations if
> DL tasks are present. Attach operations can still proceed in parallel
> as long as no DL tasks are involved.
>
> This patch also stores the CPU where DL BW is allocated and free that BW
> back to the same CPU in case cpuset_can_attach() is called.
>
> Signed-off-by: Waiman Long <longman@redhat.com>
Juri, this patch is an addendum to your series to address the issues
that I found from the cpuset point of view.
Cheers,
Longman
next prev parent reply other threads:[~2023-03-29 16:08 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-29 12:55 [PATCH 0/6] sched/deadline: cpuset: Rework DEADLINE bandwidth restoration Juri Lelli
2023-03-29 12:55 ` [PATCH 1/6] cgroup/cpuset: Rename functions dealing with DEADLINE accounting Juri Lelli
2023-04-04 20:05 ` Qais Yousef
2023-03-29 12:55 ` [PATCH 2/6] sched/cpuset: Bring back cpuset_mutex Juri Lelli
2023-04-04 17:31 ` Waiman Long
2023-04-26 11:57 ` Juri Lelli
2023-04-26 14:05 ` Waiman Long
2023-04-27 2:58 ` Xuewen Yan
2023-04-27 5:53 ` Juri Lelli
2023-04-27 11:50 ` Xuewen Yan
2023-04-28 11:22 ` Qais Yousef
2023-04-26 14:31 ` Daniel Bristot de Oliveira
2023-04-04 20:05 ` Qais Yousef
2023-03-29 12:55 ` [PATCH 3/6] sched/cpuset: Keep track of SCHED_DEADLINE task in cpusets Juri Lelli
2023-04-04 20:06 ` Qais Yousef
2023-10-09 11:43 ` Xia Fukun
2023-10-09 15:26 ` Waiman Long
2023-03-29 12:55 ` [PATCH 4/6] sched/deadline: Create DL BW alloc, free & check overflow interface Juri Lelli
2023-03-29 14:24 ` Waiman Long
2023-03-29 12:55 ` [PATCH 5/6] cgroup/cpuset: Free DL BW in case can_attach() fails Juri Lelli
2023-03-29 14:25 ` Waiman Long
2023-03-29 14:31 ` Waiman Long
2023-03-29 16:39 ` Dietmar Eggemann
2023-03-29 18:09 ` Waiman Long
2023-03-30 15:14 ` Dietmar Eggemann
2023-03-30 16:13 ` Waiman Long
2023-03-29 12:55 ` [PATCH 6/6] cgroup/cpuset: Iterate only if DEADLINE tasks are present Juri Lelli
2023-04-04 20:06 ` Qais Yousef
2023-04-26 11:58 ` Juri Lelli
2023-03-29 14:34 ` [PATCH 0/6] sched/deadline: cpuset: Rework DEADLINE bandwidth restoration Waiman Long
2023-03-29 16:02 ` [PATCH 6/7] cgroup/cpuset: Protect DL BW data against parallel cpuset_attach() Waiman Long
2023-03-29 16:05 ` Waiman Long [this message]
2023-03-30 13:34 ` Dietmar Eggemann
2023-04-04 20:09 ` [PATCH 0/6] sched/deadline: cpuset: Rework DEADLINE bandwidth restoration Qais Yousef
2023-04-18 14:11 ` Qais Yousef
2023-04-18 14:31 ` Waiman Long
2023-04-20 14:15 ` Juri Lelli
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