netdev - Re: Deadlock, L2TP over IP are not working, 3.4.1

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Message-ID: <20120607223752.GA4475@electric-eye.fr.zoreil.com>
Date:	Fri, 8 Jun 2012 00:37:52 +0200
From:	Francois Romieu <romieu@...zoreil.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Denys Fedoryshchenko <denys@...p.net.lb>, davem@...emloft.net,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Deadlock, L2TP over IP are not working, 3.4.1

Eric Dumazet <eric.dumazet@...il.com> :
[...]
> If LLTX is used, this means several cpus can execute this code at the
> same time.
> 
> You need percpu stats, or use atomic primitives.

Would adding percpu stats not be frown upon ?

As atomic will defeat the 64 bits stats on 32 bits, I should probably stick
to plain bh disabling lock.

-- 
Ueimor
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