From: David Mosberger <davidm@hpl.hp.com>
To: linux-ia64@vger.kernel.org
Subject: Re: [Linux-ia64] Re: alignment issues on netif_rx (fwd)
Date: Fri, 05 Jan 2001 20:29:13 +0000 [thread overview]
Message-ID: <marc-linux-ia64-105590678205890@msgid-missing> (raw)
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 <kaos@ocs.com.au> 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: <owner-netdev@oss.sgi.com> Date: Sun, 17 Dec
Keith> 2000 22:36:12 +0100 From: Andi Kleen <ak@muc.de> To: Johannes
Keith> Erdfelt <johannes@erdfelt.com> Cc: "David S. Miller"
Keith> <davem@redhat.com>, 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
next reply other threads:[~2001-01-05 20:29 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-05 20:29 David Mosberger [this message]
-- strict thread matches above, loose matches on Subject: below --
2000-12-18 0:42 [Linux-ia64] Re: alignment issues on netif_rx (fwd) Keith Owens
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