Timo Teräs wrote:
Ok, finally figured out the difference. Looks like depending on the sendto() / local route / forward route / my patched mrt the skb that gets passed to ipgre_tunnel_xmit() seems to have nfctinfo either 0 or 2. This value is not modified; nf_reset() is called just before ip_local_out(). Looks like nf_reset() clears nfct to NULL, but does not touch nfctinfo. So when LOCAL_OUT hook for the GRE packet is hit, depending where the packet came: it has nfct=NULL and nfctinfo=ESTABLISHED or NEW. This also seems to affect if that specific skb gets the nat/OUTPUT hook called. Is this behaviour for nf_reset() intentional?
Apparently it does not matter. The real problem seems to be bug that did not account for irq times properly. It was fixed by "sched: account system time properly" f5f293a4e3d0a0c52cec31de6762c95050156516 and that caused biased CPU usage measurements. Testing with kernel having that, I'm getting the same CPU readings. And oprofile in timer mode didn't help noticing this. Sorry for the noise. - Timo -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
