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

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Message-Id: <20100914135730.8af6bc76.akpm@linux-foundation.org>
Date:	Tue, 14 Sep 2010 13:57:30 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Michal Suchanek <hramrach@...trum.cz>
Cc:	netdev@...r.kernel.org, bugzilla-daemon@...zilla.kernel.org,
	bugme-daemon@...zilla.kernel.org,
	Herbert Xu <herbert@...dor.hengli.com.au>
Subject: Re: [Bugme-new] [Bug 18492] New: kernel softirq warning on boot

On Tue, 14 Sep 2010 22:45:19 +0200
Michal Suchanek <hramrach@...trum.cz> wrote:

> > rcu_read_unlock_bh() in netpoll_rx(), added by "netpoll: Fix RCU
> > usage".
> 
> Do you mean de85d99eb7b595f6751550184b94c1e2f74a828b?

yup.

> I am not sure reverting just that would work, nor that the kernel
> around that point is in shape for trying on a system I would want to
> still use. It's way back in history for a kernel which is just to be
> released.

No, we wouldn't want to revert it - it fixes stuff.

It could be that we just don't need the _bh locking, if local irqs are
reliably disabled.  But I didn't really look.

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