From: "Paul E. McKenney" <paulmck@kernel.org>
To: Qian Cai <cai@lca.pw>
Cc: Michael Ellerman <mpe@ellerman.id.au>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
juri.lelli@redhat.com, dietmar.eggemann@arm.com,
vincent.guittot@linaro.org, rostedt@goodmis.org,
bsegall@google.com, mgorman@suse.de, tglx@linutronix.de,
"James.Bottomley@hansenpartnership.com"
<James.Bottomley@hansenpartnership.com>,
deller@gmx.de, linuxppc-dev@lists.ozlabs.org,
linux-parisc@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, Nicholas Piggin <npiggin@gmail.com>
Subject: Re: [PATCH v2] sched/core: fix illegal RCU from offline CPUs
Date: Thu, 2 Apr 2020 09:57:37 -0700 [thread overview]
Message-ID: <20200402165737.GQ19865@paulmck-ThinkPad-P72> (raw)
In-Reply-To: <4134872A-3D1D-4860-9C1B-2FD9C00272BB@lca.pw>
On Thu, Apr 02, 2020 at 12:19:54PM -0400, Qian Cai wrote:
>
>
> > On Apr 2, 2020, at 11:54 AM, Paul E. McKenney <paulmck@kernel.org> wrote:
> >
> > I do run this combination quite frequently, but only as part of
> > rcutorture, which might not be a representative workload. For one thing,
> > it has a minimal userspace consisting only of a trivial init program.
> > I don't recall having ever seen this. (I have seen one recent complaint
> > about an IPI being sent to an offline CPU, but I cannot prove that this
> > was not due to RCU bugs that I was chasing at the time.)
>
> Yes, a trivial init is tough while running systemd should be able to catch it as it will use cgroup.
Not planning to add systemd to my rcutorture runs. ;-)
Thanx, Paul
next prev parent reply other threads:[~2020-04-02 16:57 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-01 21:40 Qian Cai
2020-04-02 11:24 ` Michael Ellerman
2020-04-02 14:00 ` Qian Cai
2020-04-02 15:54 ` Paul E. McKenney
2020-04-02 16:19 ` Qian Cai
2020-04-02 16:57 ` Paul E. McKenney [this message]
2020-04-17 13:26 ` Qian Cai
2020-04-21 13:56 ` Peter Zijlstra
-- strict thread matches above, loose matches on Subject: below --
2020-01-13 19:03 Qian Cai
2020-01-20 10:16 ` Peter Zijlstra
2020-01-20 20:35 ` Qian Cai
2020-01-21 10:35 ` Peter Zijlstra
2020-01-24 4:21 ` Qian Cai
2020-01-24 5:02 ` Matthew Wilcox
2020-03-30 2:42 ` Qian Cai
2020-04-01 21:05 ` Qian Cai
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