On 08/20/2011 04:16 PM, Brad Campbell wrote:
Author: Alexander Duyck <alexander.h.duyck@xxxxxxxxx>
Date: Thu Jul 1 13:28:27 2010 +0000
x86: Drop CONFIG_MCORE2 check around setting of NET_IP_ALIGN
This patch removes the CONFIG_MCORE2 check from around
NET_IP_ALIGN. It is
based on a suggestion from Andi Kleen. The assumption is that
there are
not any x86 cores where unaligned access is really slow, and this
change
would allow for a performance improvement to still exist on
configurations
that are not necessarily optimized for Core 2.
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: x86@xxxxxxxxxx
Signed-off-by: Alexander Duyck <alexander.h.duyck@xxxxxxxxx>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@xxxxxxxxx>
Acked-by: H. Peter Anvin <hpa@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
:040000 040000 5a15867789080a2f67a74b17c4422f85b7a9fb4a
b98769348bd765731ca3ff03b33764257e23226c M arch
I can confirm this bug exists in the 3.0 kernel, however I'm unable to
reproduce it on todays git.
So anyone using netfilter, kvm and bridge on kernels between
2.6.36-rc1 and 3.0 may hit this bug, but it looks like it is fixed in
the current 3.1-rc kernels.
Thanks for this effort. I don't think this patch is buggy in itself, it
merely exposed another bug which was fixed later on.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
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