From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: Unhandled fault or spinlock lockup suspected ?
Date: Tue, 29 Sep 2015 17:22:46 +0100 [thread overview]
Message-ID: <20150929162246.GK21513@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <560AB619.2040502@eclis.ch>
On Tue, Sep 29, 2015 at 06:02:33PM +0200, Jean-Christian de Rivaz wrote:
> I tried the last git linux master on a embedded system that worked with a
> 3.19.0 kernel before. I solved most of the problems caused by the kernel
> upgrade, but every 15 to 20 minutes I get this type of kernel report:
Yes, it's because of the user access changes. The uaccess_with_memcpy()
code got broken, and despite trying to fix it, it seems that it's still
broken. I'll try again to fix it in the next few days.
In any case, unless you have a Marvell platform, you should have this
disabled - it provides a performance boost for Marvell platforms, but
degrades performance everywhere else. Please ensure that you disable
CONFIG_UACCESS_WITH_MEMCPY.
--
FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
according to speedtest.net.
next prev parent reply other threads:[~2015-09-29 16:22 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-29 16:02 Unhandled fault or spinlock lockup suspected ? Jean-Christian de Rivaz
2015-09-29 16:22 ` Russell King - ARM Linux [this message]
2015-09-29 17:50 ` Jean-Christian de Rivaz
2015-09-29 18:01 ` Fabio Estevam
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