From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Mosberger Date: Fri, 05 Jan 2001 20:29:13 +0000 Subject: Re: [Linux-ia64] Re: alignment issues on netif_rx (fwd) Message-Id: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org Yes, that's a known problem. Unalignment fault handling is REALLY slow on IA-64 so it's not something you want to do in general. However, the kernel certainly shouldn't crash due to an unaligned network header either, so we need to enable unaligned handling in the kernel (along with printing a nasty message ;-). --david >>>>> On Mon, 18 Dec 2000 11:42:14 +1100, Keith Owens said: Keith> This just came up on the netdev list. Is Andi correct and Keith> misaligned IP options will cause a kernel error? Keith> ------- Forwarded Message Keith> Return-Path: Date: Sun, 17 Dec Keith> 2000 22:36:12 +0100 From: Andi Kleen To: Johannes Keith> Erdfelt Cc: "David S. Miller" Keith> , kai@thphy.uni-duesseldorf.de, Keith> netdev@oss.sgi.com Subject: Re: alignment issues on netif_rx Keith> On Sun, Dec 17, 2000 at 04:21:14PM +0100, Johannes Erdfelt Keith> wrote: >> However, I can't imagine we've made it this long without this >> being a problem so there must be something I'm missing. Keith> Nobody apparently tried to use IPX on IA64 yet (due to a Keith> different ethernet header length it usually has to deal with Keith> an misaligned header) Keith> With this there are also plenty of ways to crash an IA64 box Keith> remotely, e.g. by putting misaligned timestamps into options. Keith> - -Andi Keith> ------- End of Forwarded Message Keith> _______________________________________________ Linux-IA64 Keith> mailing list Linux-IA64@linuxia64.org Keith> http://lists.linuxia64.org/lists/listinfo/linux-ia64