On Mon, 2011-11-14 at 15:12 -0800, Thomas Gleixner wrote: > On Mon, 14 Nov 2011, Darcy Watkins wrote: > > > Hi, > > > > Anyone have insight into the kernel crash below? > > Can you please enable CONFIG_PROVE_LOCKING ? That should tell us all > the details. Hi Thomas, I tried that but couldn't fit the resulting system into the memory on the device. oops! But I think I determined the cause. The function header comments for netif_receive_skb() mentions it should only be used under softirqd context. I guess earlier kernel versions I used didn't really care. But the newest ones do. To invoke it under the thread context, I used the technique described in... http://kerneltrap.org/mailarchive/linux-netdev/2010/5/19/6277601 ...and it seems to avoid the crash. Essentially the trick is to suspend bottom half, then invoke netif_receive_skb(), then allow it. When I looked at dev.c in netif_rx_ni() I notice functions like migate_disable/enable(), are those related to SMP support? Thanks, Darcy > > Thanks, > > tglx > > -- 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
