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RE: [Xen-ia64-devel] networking works!

To: "Tian, Kevin" <kevin.tian@xxxxxxxxx>
Subject: RE: [Xen-ia64-devel] networking works!
From: Alex Williamson <alex.williamson@xxxxxx>
Date: Mon, 15 May 2006 21:05:10 -0600
Cc: xen-ia64-devel <xen-ia64-devel@xxxxxxxxxxxxxxxxxxx>
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On Tue, 2006-05-16 at 10:55 +0800, Tian, Kevin wrote:

> - Bunches of unaligned accesses at wget:
> kernel unaligned access to 0xe000000008fdd61e, ip=0xa0000001009e3270
> (Faulting address from br_nf_pre_routing)

   Yes, this unaligned access is rather annoying and causes a noticable
slow down in networking perf when it occurs.  I traced it back to
skb->nh.iph in br_nf_pre_routing_finish() and br_nf_pre_routing() is
pointing to a struct iphdr that is only 2-byte aligned.

        Alex

-- 
Alex Williamson                             HP Linux & Open Source Lab


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