From: jc@eclis•ch (Jean-Christian de Rivaz)
To: linux-arm-kernel@lists•infradead.org
Subject: Unhandled fault or spinlock lockup suspected ?
Date: Tue, 29 Sep 2015 19:50:08 +0200 [thread overview]
Message-ID: <560ACF50.8030205@eclis.ch> (raw)
In-Reply-To: <20150929162246.GK21513@n2100.arm.linux.org.uk>
Le 29. 09. 15 18:22, Russell King - ARM Linux a ?crit :
> 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.
>
Hi Russell, many thanks for your fast help. Work well when
CONFIG_UACCESS_WITH_MEMCPY is disabled.
Jean-Christian
next prev parent reply other threads:[~2015-09-29 17:50 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
2015-09-29 17:50 ` Jean-Christian de Rivaz [this message]
2015-09-29 18:01 ` Fabio Estevam
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