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

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Message-ID: <CAF+s44TLpaK_xWsfv9B7jQtW0stSjJnk2GgaftpAJG+Epkp-7w@mail.gmail.com>
Date: Thu, 8 Jan 2026 20:02:48 +0800
From: Pingfan Liu <piliu@...hat.com>
To: Peter Zijlstra <peterz@...radead.org>
Cc: Waiman Long <llong@...hat.com>, 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>
Subject: Re: [PATCHv2 0/2] sched/deadline: Fix potential race in dl_add_task_root_domain()

On Thu, Jan 8, 2026 at 7:42 PM Peter Zijlstra <peterz@...radead.org> wrote:
>
> On Wed, Jan 07, 2026 at 02:57:00PM -0500, Waiman Long wrote:
> >
> > 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.
>
> Thanks for the ping -- just to double check, I need to take the v2
> patches, that are posted inside the v7 thread?
>

Sorry for the confusion. The two fixes in v2 are actually intended to
address the issue in patch [2/2] of v7.

> I mean; I absolutely detest posting new series in the same thread as an
> older series and then you go and do non-linear versioning just to make
> it absolutely impossible to tell what's what. :-(
>

I will use reference format in future. Again, sorry for the confusion.

Best Regards,

Pingfan