From: Frank Blaschka <frank.blaschka@xxxxxxxxxx>
Allocate headroom for TR_HLEN but using only ETH_HLEN causes rx
performance degradation. Allocate ETH_HLEN for ethernet and
TR_HLEN for token ring (layer 3 mode).
Signed-off-by: Frank Blaschka <frank.blaschka@xxxxxxxxxx>
---
drivers/s390/net/qeth_core_main.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
Index: git_davem-2.6.26/drivers/s390/net/qeth_core_main.c
===================================================================
--- git_davem-2.6.26.orig/drivers/s390/net/qeth_core_main.c 2008-03-31 13:21:07.000000000 +0200
+++ git_davem-2.6.26/drivers/s390/net/qeth_core_main.c 2008-03-31 13:21:36.000000000 +0200
@@ -4002,7 +4002,11 @@
}
} else {
skb_len = (*hdr)->hdr.l3.length;
- headroom = max((int)ETH_HLEN, (int)TR_HLEN);
+ if ((card->info.link_type == QETH_LINK_TYPE_LANE_TR) ||
+ (card->info.link_type == QETH_LINK_TYPE_HSTR))
+ headroom = TR_HLEN;
+ else
+ headroom = ETH_HLEN;
}
if (!skb_len)
--
--
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