Nivedita, Thanks for your reply. This IS running on an SMP machine. Is there anyway to prevent the reordering from happening? Craig -----Original Message----- From: Nivedita Singhvi [mailto:niv@us.ibm.com] Sent: Thursday, November 21, 2002 1:25 PM To: Maxwell, Craig; linux-net@vger.kernel.org Subject: Re: UDP Packet Order > My main question is, once a UDP packet arrives at the ethernet > interface, does the kernel send them up to user space in the order that > they were received or might it reorder them for some reason? Yes, reordering can happen if youre running on an SMP machine, and to varying degrees depending on which kernel you are using.. (2.4, 2.5+NAPI, etc). thanks, Nivedita - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html