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From: William Tambe <tambewilliam@gmail.com>
To: rcu@vger.kernel.org
Subject: Re: delayed_put_task_struct() used through call_rcu() by put_task_struct_rcu_user() never gets called
Date: Sat, 8 Aug 2020 16:19:42 -0500	[thread overview]
Message-ID: <CAF8i9mMJCdadZkVDxCENhQbEVD4wmA1hU50nBo6AOhU16Y6cMg@mail.gmail.com> (raw)
In-Reply-To: <CAF8i9mO3AcW+dnXvGsiJ7STu42OQEuqkTG0PGaCpZT=9OQq=Ug@mail.gmail.com>

On Sat, Aug 8, 2020 at 4:17 PM William Tambe <tambewilliam@gmail.com> wrote:
>
> On Sat, Aug 8, 2020 at 1:21 PM William Tambe <tambewilliam@gmail.com> wrote:
> >
> > I am having an issue in my kernel where delayed_put_task_struct() used
> > through call_rcu() by put_task_struct_rcu_user() never gets called.
>
> I am able to trace this issue to invoke_rcu_core() not getting called
> in __call_rcu_core() due to rcu_is_watching() always returning true.
>
> Any idea why I am seeing such an issue ?

Also, the issue is not happening when using highres=off .

>
> >
> > Any idea ?

  reply	other threads:[~2020-08-08 21:19 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-08 18:21 delayed_put_task_struct() used through call_rcu() by put_task_struct_rcu_user() never gets called William Tambe
2020-08-08 21:17 ` William Tambe
2020-08-08 21:19   ` William Tambe [this message]
2020-08-08 22:09     ` Paul E. McKenney
2020-08-09  2:31       ` William Tambe
2020-08-09  3:46         ` Paul E. McKenney
2020-08-09 14:22           ` William Tambe
2020-08-09 15:35             ` Paul E. McKenney
2020-08-09 16:26               ` William Tambe
2020-08-09 20:46                 ` Paul E. McKenney

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