linux-kernel - Re: [PATCHv2 0/2] sched/deadline: Fix potential race in dl_add_task_root

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Message-ID: <9deefb73-fb3a-4bb0-a808-88c478ea3240@redhat.com>
Date: Wed, 7 Jan 2026 14:57:00 -0500
From: Waiman Long <llong@...hat.com>
To: Peter Zijlstra <peterz@...radead.org>
Cc: cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
 Tejun Heo <tj@...nel.org>, Chen Ridong <chenridong@...weicloud.com>,
 Pierre Gondois <pierre.gondois@....com>, Ingo Molnar <mingo@...hat.com>,
 Vincent Guittot <vincent.guittot@...aro.org>,
 Dietmar Eggemann <dietmar.eggemann@....com>,
 Steven Rostedt <rostedt@...dmis.org>, Ben Segall <bsegall@...gle.com>,
 Mel Gorman <mgorman@...e.de>, Valentin Schneider <vschneid@...hat.com>,
 Juri Lelli <juri.lelli@...hat.com>, Pingfan Liu <piliu@...hat.com>
Subject: Re: [PATCHv2 0/2] sched/deadline: Fix potential race in
 dl_add_task_root_domain()


On 11/25/25 3:14 AM, Juri Lelli wrote:
> Hi,
>
> On 25/11/25 11:26, Pingfan Liu wrote:
>> These two patches address the issue reported by Juri [1] (thanks!).
>>
>> The first removes an unnecessary comment, the second is the actual fix.
>>
>> @Tejun, while these could be squashed together, I kept them separate to
>> maintain the one-patch-one-purpose rule. let me know if you'd like me to
>> resend these in a different format, or feel free to adjust as needed.
>>
>> [1]: https://lore.kernel.org/lkml/aSBjm3mN_uIy64nz@jlelli-thinkpadt14gen4.remote.csb
>>
>> Pingfan Liu (2):
>>    sched/deadline: Remove unnecessary comment in
>>      dl_add_task_root_domain()
>>    sched/deadline: Fix potential race in dl_add_task_root_domain()
>>
>>   kernel/sched/deadline.c | 12 ++----------
>>   1 file changed, 2 insertions(+), 10 deletions(-)
> For both
>
> Acked-by: Juri Lelli <juri.lelli@...hat.com>

Peter,

Are these 2 patches eligible to be merged into the the scheduler branch 
of the tip tree? These are bug fixes to the deadline scheduler code.

Cheers,
Longman