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Date: Sat, 17 Feb 2007 23:57:46 +0100 From: Francois Romieu <romieu@...zoreil.com> To: Michal Piotrowski <michal.k.k.piotrowski@...il.com> Cc: LKML <linux-kernel@...r.kernel.org>, netdev@...r.kernel.org Subject: netpoll again ? (was: Re: 2.6.20-git14 rtl8139 possible circular locking dependency detected) Francois Romieu <romieu@...zoreil.com> : > Michal Piotrowski <michal.k.k.piotrowski@...il.com> : > [...] > > Did you enable RTL8139_DEBUG ? > > If so you can try the patch below. It's buggy there too but you are not experiencing this one. 1 - netpoll() calls the poll() handler of the device through netpoll_poll() 2 - The poll handler of the device tries to acquire dev->_xmit_lock through dev_mc_add during the Rx protocol processing 3 - netpoll() holds dev->_xmit_lock to avoid recursion in netpoll_poll() #2 and #3 have opposite requirements. -- Ueimor - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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