netdev - Re: [Bugme-new] [Bug 18492] New: kernel softirq warning on boot

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Message-ID: <AANLkTinyhM30KV+Etg2qDzEoqOjcPj7gv5EkPbknxYVQ@mail.gmail.com>
Date:	Fri, 17 Sep 2010 20:00:42 +0200
From:	Michal Suchanek <hramrach@...trum.cz>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	David Miller <davem@...emloft.net>, akpm@...ux-foundation.org,
	netdev@...r.kernel.org, bugzilla-daemon@...zilla.kernel.org,
	bugme-daemon@...zilla.kernel.org
Subject: Re: [Bugme-new] [Bug 18492] New: kernel softirq warning on boot

On 15 September 2010 08:46, Herbert Xu <herbert@...dor.apana.org.au> wrote:
> On Tue, Sep 14, 2010 at 02:11:03PM -0700, David Miller wrote:
>>
>> I'll take a closer look at this if Herbert doesn't beat me to it.
>
> I thought we were going to use this patch until Paul's BH warning
> removal made it into mainline?
>
> netpoll: Disable IRQ around RCU dereference in netpoll_rx
>
> We cannot use rcu_dereference_bh safely in netpoll_rx as we may
> be called with IRQs disabled.  We could however simply disable
> IRQs as that too causes BH to be disabled and is safe in either
> case.
>
> Thanks to John Linville for discovering this bug and providing
> a patch.
>
With the patch applied I no longet get the warning.

Thanks

Michal
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