From: Will Deacon <will@kernel.org>
To: "Paul E. McKenney" <paulmck@kernel.org>, Qian Cai <cai@redhat.com>
Cc: catalin.marinas@arm.com, kernel-team@android.com,
Will Deacon <will@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] arm64/smp: Move rcu_cpu_starting() earlier
Date: Fri, 30 Oct 2020 16:33:25 +0000 [thread overview]
Message-ID: <160404559895.1777248.8248643695413627642.b4-ty@kernel.org> (raw)
In-Reply-To: <20201028182614.13655-1-cai@redhat.com>
On Wed, 28 Oct 2020 14:26:14 -0400, Qian Cai wrote:
> The call to rcu_cpu_starting() in secondary_start_kernel() 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 arm64 (for-next/fixes), thanks!
[1/1] arm64/smp: Move rcu_cpu_starting() earlier
https://git.kernel.org/arm64/c/ce3d31ad3cac
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
WARNING: multiple messages have this Message-ID (diff)
From: Will Deacon <will@kernel.org>
To: "Paul E. McKenney" <paulmck@kernel.org>, Qian Cai <cai@redhat.com>
Cc: Will Deacon <will@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
catalin.marinas@arm.com, linux-kernel@vger.kernel.org,
kernel-team@android.com, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] arm64/smp: Move rcu_cpu_starting() earlier
Date: Fri, 30 Oct 2020 16:33:25 +0000 [thread overview]
Message-ID: <160404559895.1777248.8248643695413627642.b4-ty@kernel.org> (raw)
In-Reply-To: <20201028182614.13655-1-cai@redhat.com>
On Wed, 28 Oct 2020 14:26:14 -0400, Qian Cai wrote:
> The call to rcu_cpu_starting() in secondary_start_kernel() 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 arm64 (for-next/fixes), thanks!
[1/1] arm64/smp: Move rcu_cpu_starting() earlier
https://git.kernel.org/arm64/c/ce3d31ad3cac
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-10-30 16:33 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-28 18:26 [PATCH] arm64/smp: Move rcu_cpu_starting() earlier Qian Cai
2020-10-28 18:26 ` Qian Cai
2020-10-28 21:00 ` Paul E. McKenney
2020-10-28 21:00 ` Paul E. McKenney
2020-10-29 9:10 ` Will Deacon
2020-10-29 9:10 ` Will Deacon
2020-10-29 13:17 ` Qian Cai
2020-10-29 13:17 ` Qian Cai
2020-10-30 8:15 ` Will Deacon
2020-10-30 8:15 ` Will Deacon
2020-10-29 14:09 ` Paul E. McKenney
2020-10-29 14:09 ` Paul E. McKenney
2020-10-30 16:33 ` Will Deacon [this message]
2020-10-30 16:33 ` Will Deacon
2020-11-05 22:22 ` Will Deacon
2020-11-05 22:22 ` Will Deacon
2020-11-05 23:02 ` Qian Cai
2020-11-05 23:02 ` Qian Cai
2020-11-05 23:28 ` Paul E. McKenney
2020-11-05 23:28 ` Paul E. McKenney
2020-11-06 2:15 ` Qian Cai
2020-11-06 2:15 ` Qian Cai
2020-11-06 4:07 ` Paul E. McKenney
2020-11-06 4:07 ` Paul E. McKenney
2020-11-06 10:37 ` Will Deacon
2020-11-06 10:37 ` Will Deacon
2020-11-06 12:48 ` Qian Cai
2020-11-06 12:48 ` Qian Cai
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