alignment issues on netif_rx (fwd)
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
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Quoted 1 line · Keith Owens
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: <[email protected]> Date: Sun, 17 Dec Keith> 2000 22:36:12 +0100 From: Andi Kleen <[email protected]> To: Johannes Keith> Erdfelt <[email protected]> Cc: "David S. Miller" Keith> <[email protected]>, [email protected], Keith> [email protected] Subject: Re: alignment issues on netif_rx
Keith> On Sun, Dec 17, 2000 at 04:21:14PM +0100, Johannes Erdfelt
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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
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