linux-kernel - Re: suspicious RCU usage on 4.4-rc2 ARM platform

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Message-ID: <20151124164014.GF8644@n2100.arm.linux.org.uk>
Date:	Tue, 24 Nov 2015 16:40:14 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Juri Lelli <juri.lelli@....com>
Cc:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	LKML <linux-kernel@...r.kernel.org>,
	ALKML <linux-arm-kernel@...ts.infradead.org>
Subject: Re: suspicious RCU usage on 4.4-rc2 ARM platform

On Tue, Nov 24, 2015 at 04:27:50PM +0000, Juri Lelli wrote:
> I'm hitting these splats while running simple hotplug tests on an ARM
> TC2 platform. The following seems to cure it, but I don't think it never
> made it to mainline:

It looks like it's because of the way we take CPUs offline.  It's a
known problem, one which is not simple to resolve.

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