Hello Tim, On Thu, Feb 02, 2012 at 01:38:44PM +0100, Tim Sander wrote: > Hi > > When booting my platform with DHCP on, the DHCP request is sent by the > > network driver before the PHY has even started the autonegotiation. > > Since the PHY is not ready, the TX interrupt returns with NETDEV_TX_BUSY > > but the softirq [sirq-net-tx] seems to have entered an infinite spin, as > > my system is practically hung and 'top' reveals [sirq-net-tx/0] is > > consuming 95% of CPU. This is preventing the PHY autonegotiation (which is > > scheduled as a delayed work) to start, so the PHY is never ready and the > > packet never reaches the network. > Mh, i think i am hit by the same problem. I have a i.mx 35 and when dhcp is > enabled the ksoftirq is also running wild with 3.0-rt. This also happens when I fail to reproduce that on a pcm043 machine using 3.0.18-rt34. Can you provide me your config. Does the problem occur on every boot for you? If not, how often do I need to reboot? @Hector: Greeting to Spain. I don't have an imx51 machine handy, but your config and your answers on my questions might help, too. Best regards Uwe -- Pengutronix e.K. | Uwe Kleine-König | Industrial Linux Solutions | http://www.pengutronix.de/ | -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
