From: frank.blaschka@de.ibm.com
To: jgarzik@pobox.com
Cc: netdev@vger.kernel.org, linux-s390@vger.kernel.org
Subject: [patch 7/8] qeth: core code should alloc headroom for LLC protocol
Date: Tue, 01 Apr 2008 10:26:59 +0200 [thread overview]
Message-ID: <20080401082745.152557000@de.ibm.com> (raw)
In-Reply-To: 20080401082652.754871000@de.ibm.com
[-- Attachment #1: 07-qeth_headroom.patch --]
[-- Type: text/plain, Size: 1007 bytes --]
From: Frank Blaschka <frank.blaschka@de.ibm.com>
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@de.ibm.com>
---
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)
--
next prev parent reply other threads:[~2008-04-01 8:27 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-01 8:26 [patch 0/8] s390: qeth bug fixes for 2.6.26 frank.blaschka
2008-04-01 8:26 ` [patch 1/8] qeth: improve ip_list administration after deregister failures frank.blaschka
2008-04-12 9:02 ` Jeff Garzik
2008-04-01 8:26 ` [patch 2/8] qeth: allow qdio queue element addresses > 2GB frank.blaschka
2008-04-01 8:26 ` [patch 3/8] qeth: set lan_online flag after a received STARTLAN frank.blaschka
2008-04-01 8:26 ` [patch 4/8] qeth: CCL-sequence numbers required for protocol ETH_P_802_2 only frank.blaschka
2008-04-01 8:26 ` [patch 6/8] qeth: improving debug message handling frank.blaschka
2008-04-01 8:26 ` frank.blaschka [this message]
2008-04-01 8:27 ` [patch 8/8] qeth: keep ip-address after LAN_OFFLINE failure frank.blaschka
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