From: Julian Wiedmann <jwi@linux.ibm.com>
To: David Miller <davem@davemloft.net>
Cc: <netdev@vger.kernel.org>, <linux-s390@vger.kernel.org>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Stefan Raspl <raspl@linux.ibm.com>,
Ursula Braun <ubraun@linux.ibm.com>,
Julian Wiedmann <jwi@linux.ibm.com>
Subject: [PATCH net 2/4] s390/qeth: switch on SG by default for IQD devices
Date: Wed, 12 Sep 2018 15:31:33 +0200 [thread overview]
Message-ID: <20180912133135.12335-3-jwi@linux.ibm.com> (raw)
In-Reply-To: <20180912133135.12335-1-jwi@linux.ibm.com>
Scatter-gather transmit brings a nice performance boost. Considering the
rather large MTU sizes at play, it's also totally the Right Thing To Do.
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
---
drivers/s390/net/qeth_core_main.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 6b24face21d5..b60055e9cb1a 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -5706,6 +5706,8 @@ static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
dev->priv_flags &= ~IFF_TX_SKB_SHARING;
dev->hw_features |= NETIF_F_SG;
dev->vlan_features |= NETIF_F_SG;
+ if (IS_IQD(card))
+ dev->features |= NETIF_F_SG;
}
return dev;
--
2.16.4
next prev parent reply other threads:[~2018-09-12 18:36 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-12 13:31 [PATCH net 0/4] s390/qeth: fixes 2018-09-12 Julian Wiedmann
2018-09-12 13:31 ` [PATCH net 1/4] s390/qeth: indicate error when netdev allocation fails Julian Wiedmann
2018-09-12 13:31 ` Julian Wiedmann [this message]
2018-09-12 13:31 ` [PATCH net 3/4] s390/qeth: use vzalloc for QUERY OAT buffer Julian Wiedmann
2018-09-12 13:31 ` [PATCH net 4/4] s390/qeth: don't dump past end of unknown HW header Julian Wiedmann
2018-09-12 20:13 ` [PATCH net 0/4] s390/qeth: fixes 2018-09-12 David Miller
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