From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: "Paul E . McKenney" <paulmck@kernel.org>, Qian Cai <cai@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
linuxppc-dev@lists.ozlabs.org, Paul Mackerras <paulus@samba.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] powerpc/smp: Move rcu_cpu_starting() earlier
Date: Wed, 4 Nov 2020 22:38:32 +1100 (AEDT) [thread overview]
Message-ID: <160448988356.674824.15131006402948740998.b4-ty@ellerman.id.au> (raw)
In-Reply-To: <20201028182334.13466-1-cai@redhat.com>
On Wed, 28 Oct 2020 14:23:34 -0400, Qian Cai wrote:
> The call to rcu_cpu_starting() in start_secondary() is not early enough
> in the CPU-hotplug onlining process, which results in lockdep splats as
> follows:
>
> WARNING: suspicious RCU usage
> -----------------------------
> kernel/locking/lockdep.c:3497 RCU-list traversed in non-reader section!!
>
> [...]
Applied to powerpc/fixes.
[1/1] powerpc/smp: Call rcu_cpu_starting() earlier
https://git.kernel.org/powerpc/c/99f070b62322a4b8c1252952735806d09eb44b68
cheers
prev parent reply other threads:[~2020-11-04 11:44 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-28 18:23 [PATCH] powerpc/smp: Move rcu_cpu_starting() earlier Qian Cai
2020-10-28 20:59 ` Paul E. McKenney
2020-10-29 0:09 ` Michael Ellerman
2020-10-29 0:31 ` Paul E. McKenney
2020-10-29 13:48 ` Qian Cai
2020-10-29 12:17 ` Qian Cai
2020-11-04 11:38 ` Michael Ellerman [this message]
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