Messages in this thread | | | Date | Sat, 10 Mar 2007 14:06:28 +0000 | From | Simon Arlott <> | Subject | Re: netconsole system freeze when cable unplugged |
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On 10/03/07 13:38, Andi Kleen wrote: > Simon Arlott <simon@fire.lp0.eu> writes: > >> On 09/03/07 20:42, Francois Romieu wrote: >>> Simon Arlott <simon@fire.lp0.eu> : >>>> When I unplug the cable the system just stops responding to >>>> anything, at all. No message is printed to the console when the >>>> cable is plugged back in. >>> rtl8139_interrupt (spin_lock(&tp->lock)) >>> -> rtl8139_weird_interrupt >>> -> rtl_check_media >>> -> mii_check_media (printk(KERN_INFO "%s: link down\n", ...)) >>> [netpoll stuff here] >>> -> rtl8139_poll_controller >>> -> rtl8139_interrupt >>> *deadlock* >>> See below for my random stuff of the day. Feel free to open a PR at >>> bugzilla.kernel.org if the issue does not go away. >> The patch doesn't fix it, nothing changes. I'm not sure how this can >> be debugged if printk won't work... > > earlyprintk can be called directly (early_printk()) and should > work. It won't log over the network of course.
It also won't log over the serial console either :( (but that's probably a good thing, it's slow enough to boot with tons of messages to the display because of netconsole and nfs).
rtl8139_interrupt -> spin_lock(&tp->lock) -> rtl8139_weird_interrupt -> rtl_check_media -> mii_check_media -> printk(KERN_INFO "%s: link down\n", ...) -> wite_msg -> local_irq_save -> netpoll_send_udp -> netpoll_send_skb -> local_irq_save -> dev->hard_start_xmit(..., ...) rtl8139_start_xmit -> spin_lock_irqsave *deadlock*
-- Simon Arlott - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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