From: "Michael S. Tsirkin" <mst@redhat.com>
To: Herbert Xu <herbert@gondor.hengli.com.au>
Cc: "Shan Wei" <shanwei@cn.fujitsu.com>,
"Michał Mirosław" <mirq-linux@rere.qmqm.pl>,
netdev@vger.kernel.org,
"Ben Hutchings" <bhutchings@solarflare.com>
Subject: Re: tap/bridge: Dropping NETIF_F_GSO/NETIF_F_SG
Date: Mon, 16 May 2011 10:32:10 +0300 [thread overview]
Message-ID: <20110516073210.GB6610@redhat.com> (raw)
In-Reply-To: <20110505100506.GA20111@gondor.apana.org.au>
On Thu, May 05, 2011 at 08:05:06PM +1000, Herbert Xu wrote:
> On Thu, May 05, 2011 at 05:34:43PM +0800, Shan Wei wrote:
> >
> > TUN_F_TSO4, TUN_F_TSO6, TUN_F_TSO_ECN, TUN_F_UFO these features are
> > depend on NETIF_F_SG. If NETIF_F_SG is not set, these features are not be
> > enabled and warnings are printed in netdev_fix_features().
>
> No, when the user turns off checksum offload everything should
> be turned off as well. However, when it's turned on, we shouldn't
> enable everything automatically.
>
> Cheers,
So how is NETIF_F_SG supposed to be enabled then?
In upstream kernels userspace can disable checksum offloading then
re-enable and get SG set back. userspace came to depend on this
behaviour so I think changing this is a regression.
> --
> Email: Herbert Xu <herbert@gondor.apana.org.au>
> Home Page: http://gondor.apana.org.au/~herbert/
> PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
> --
> To unsubscribe from this list: send the line "unsubscribe netdev" in
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next prev parent reply other threads:[~2011-05-16 7:32 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-04 18:18 tap/bridge: Dropping NETIF_F_GSO/NETIF_F_SG Michael S. Tsirkin
2011-05-04 22:34 ` Herbert Xu
2011-05-04 23:28 ` Michał Mirosław
2011-05-05 0:19 ` Herbert Xu
2011-05-05 8:44 ` Michael S. Tsirkin
2011-05-05 9:34 ` Shan Wei
2011-05-05 10:05 ` Herbert Xu
2011-05-16 7:32 ` Michael S. Tsirkin [this message]
2011-05-16 8:07 ` Herbert Xu
2011-05-16 8:18 ` Michael S. Tsirkin
2011-05-16 9:38 ` Herbert Xu
2011-05-16 9:48 ` Michael S. Tsirkin
2011-05-16 10:43 ` Herbert Xu
2011-05-16 11:21 ` Michael S. Tsirkin
2011-05-16 12:18 ` Herbert Xu
2011-05-16 12:24 ` Michał Mirosław
2011-05-16 22:46 ` Herbert Xu
2011-05-16 23:06 ` David Miller
2011-05-16 23:45 ` Herbert Xu
2011-05-17 5:18 ` Michael S. Tsirkin
2011-05-17 5:24 ` Herbert Xu
2011-05-17 5:48 ` Michael S. Tsirkin
2011-05-17 6:25 ` Herbert Xu
2011-05-17 8:08 ` Michał Mirosław
2011-05-17 8:15 ` Michał Mirosław
2011-05-17 8:19 ` [PATCH] net: tuntap: Fix tun_net_fix_features() Michał Mirosław
2011-05-17 14:29 ` Michael S. Tsirkin
2011-05-17 14:46 ` Michał Mirosław
2011-05-17 14:54 ` Michael S. Tsirkin
2011-05-17 15:00 ` Michał Mirosław
2011-05-17 15:11 ` Michael S. Tsirkin
2011-06-01 9:25 ` Michael S. Tsirkin
2011-06-20 19:14 ` [RESENT PATCH] " Michał Mirosław
2011-06-20 19:25 ` Ben Hutchings
2011-06-20 19:44 ` Michał Mirosław
2011-05-16 10:53 ` tap/bridge: Dropping NETIF_F_GSO/NETIF_F_SG Michał Mirosław
2011-05-16 8:28 ` Michael S. Tsirkin
2011-05-05 15:26 ` Michał Mirosław
2011-05-14 6:54 ` Shan Wei
2011-05-16 7:28 ` Michael S. Tsirkin
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