linux-kernel - Re: Dropping NETIF_F_SG since no checksum feature.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20061011.022015.63051509.davem@davemloft.net>
Date:	Wed, 11 Oct 2006 02:20:15 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	mst@...lanox.co.il
Cc:	shemminger@...l.org, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, openib-general@...nib.org,
	rolandd@...co.com
Subject: Re: Dropping NETIF_F_SG since no checksum feature.

From: "Michael S. Tsirkin" <mst@...lanox.co.il>
Date: Wed, 11 Oct 2006 11:05:04 +0200

> So, it seems that if I set NETIF_F_SG but clear NETIF_F_ALL_CSUM,
> data will be copied over rather than sent directly.
> So why does dev.c have to force set NETIF_F_SG to off then?

Because it's more efficient to copy into a linear destination
buffer of an SKB than page sub-chunks when doing checksum+copy.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/