From: Roland Dreier <rdreier@cisco.com>
To: "Michael S. Tsirkin" <mst@mellanox.co.il>
Cc: Stephen Hemminger <shemminger@osdl.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
netdev@vger.kernel.org, openib-general@openib.org,
Roland Dreier <rolandd@cisco.com>,
"David S. Miller" <davem@davemloft.net>
Subject: Re: Dropping NETIF_F_SG since no checksum feature.
Date: Tue, 10 Oct 2006 20:33:46 -0700 [thread overview]
Message-ID: <adar6xfbk6d.fsf@cisco.com> (raw)
In-Reply-To: <20061011002656.GB30093@mellanox.co.il> (Michael S. Tsirkin's message of "Wed, 11 Oct 2006 02:26:56 +0200")
Michael> My guess was, an extra pass over data is likely to be
Michael> expensive - dirtying the cache if nothing else. But I do
Michael> plan to measure that, and see.
I don't get it -- where's the extra pass? If you can't compute the
checksum on the NIC then you have to compute sometime it on the CPU
before passing the data to the NIC.
- R.
next prev parent reply other threads:[~2006-10-11 3:33 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-09 17:47 Dropping NETIF_F_SG since no checksum feature Michael S. Tsirkin
2006-10-09 16:50 ` Stephen Hemminger
2006-10-10 14:43 ` Michael S. Tsirkin
2006-10-10 17:43 ` Stephen Hemminger
2006-10-11 0:13 ` Michael S. Tsirkin
2006-10-11 0:15 ` Roland Dreier
2006-10-11 0:26 ` Michael S. Tsirkin
2006-10-11 3:33 ` Roland Dreier [this message]
2006-10-11 3:36 ` David Miller
2006-10-11 3:42 ` Roland Dreier
2006-10-11 3:45 ` David Miller
2006-10-11 3:49 ` Roland Dreier
2006-10-11 3:50 ` David Miller
2006-10-11 2:15 ` David Miller
2006-10-11 9:05 ` Michael S. Tsirkin
2006-10-11 9:09 ` Steven Whitehouse
2006-10-11 15:01 ` Michael S. Tsirkin
2006-10-11 20:11 ` Steven Whitehouse
2006-10-11 20:52 ` Michael S. Tsirkin
2006-10-11 20:57 ` Stephen Hemminger
2006-10-11 21:23 ` Michael S. Tsirkin
2006-10-11 21:29 ` Stephen Hemminger
2006-10-11 21:42 ` Michael S. Tsirkin
2006-10-11 21:41 ` David Miller
2006-10-12 19:12 ` Michael S. Tsirkin
2006-10-13 4:22 ` David Miller
2006-10-13 6:17 ` Michael S. Tsirkin
2006-10-11 20:52 ` David Miller
2006-10-11 21:11 ` Michael S. Tsirkin
2006-10-11 9:20 ` David Miller
2006-10-11 9:46 ` Michael S. Tsirkin
2006-10-11 18:21 ` [openib-general] " Michael Krause
2006-10-11 13:11 ` [RFC] Question about potential problem in net/ipv4/route.c Eric Dumazet
2006-10-12 5:05 ` David Miller
2006-10-12 5:31 ` Patrick McHardy
2006-10-12 5:54 ` David Miller
2006-10-12 5:48 ` Eric Dumazet
2006-10-12 6:02 ` David Miller
2006-10-12 6:10 ` Patrick McHardy
2006-10-12 6:25 ` David Miller
2006-10-12 6:35 ` Eric Dumazet
2006-10-12 7:48 ` David Miller
2006-10-16 9:00 ` [PATCH] NET : Suspicious locking in reqsk_queue_hash_req() Eric Dumazet
2006-10-16 9:07 ` Eric Dumazet
2006-10-16 16:16 ` Arnaldo Carvalho de Melo
2006-10-16 16:56 ` Eric Dumazet
2006-10-16 17:39 ` Eric Dumazet
2006-10-16 20:41 ` David Miller
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