From: Horst Hartmann <horsth@linux.vnet.ibm.com>
Date: Thu, 17 Feb 2011 12:13:59 +0000 (+0100)
Subject: [S390] net: provide architecture specific NET_SKB_PAD
X-Git-Tag: v2.6.38-rc6~14^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dd30ac327481f1663b6526fa9fa078569188b7cc;p=pandora-kernel.git

[S390] net: provide architecture specific NET_SKB_PAD

NET_SKB_PAD has been increased from 32 to 64 and later to
max(32, L1_CACHE_BYTES). This led to a 25% throughput decrease for
streaming workloads accompanied by a 37% CPU cost increase on s390.
Define a architecture specific NET_SKB_PAD with the old value of 32.

Signed-off-by: Horst Hartmann <horsth@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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