From: Rusty Russell <rusty@rustcorp•com.au>
To: David Miller <davem@davemloft•net>, mirq-linux@rere•qmqm.pl
Cc: netdev@vger•kernel.org
Subject: Re: [PATCH] net: tun: convert to hw_features
Date: Wed, 27 Apr 2011 14:29:31 +0930 [thread overview]
Message-ID: <87r58ol26k.fsf@rustcorp.com.au> (raw)
In-Reply-To: <20110420.013216.28818575.davem@davemloft.net>
On Wed, 20 Apr 2011 01:32:16 -0700 (PDT), David Miller <davem@davemloft•net> wrote:
> From: Michał Mirosław <mirq-linux@rere•qmqm.pl>
> Date: Tue, 19 Apr 2011 18:13:10 +0200 (CEST)
>
> > This changes offload setting behaviour to what I think is correct:
> > - offloads set via ethtool mean what admin wants to use (by default
> > he wants 'em all)
> > - offloads set via ioctl() mean what userspace is expecting to get
> > (this limits which admin wishes are granted)
> > - TUN_NOCHECKSUM is ignored, as it might cause broken packets when
> > forwarded (ip_summed == CHECKSUM_UNNECESSARY means that checksum
> > was verified, not that it can be ignored)
> >
> > If TUN_NOCHECKSUM is implemented, it should set skb->csum_* and
> > skb->ip_summed (= CHECKSUM_PARTIAL) for known protocols and let others
> > be verified by kernel when necessary.
> >
> > TUN_NOCHECKSUM handling was introduced by commit
> > f43798c27684ab925adde7d8acc34c78c6e50df8:
> >
> > tun: Allow GSO using virtio_net_hdr
> >
> > Signed-off-by: Michał Mirosław <mirq-linux@rere•qmqm.pl>
>
> Applied.
Dave, you just removed a feature that has been in Linux since before
git. It *probably* just means we go slower in cases we don't really
care about. But does removing it break qemu? Has anyone tested?
Thanks,
Rusty.
prev parent reply other threads:[~2011-04-27 6:07 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-19 16:13 [PATCH] net: tun: convert to hw_features Michał Mirosław
2011-04-20 3:22 ` Rusty Russell
2011-04-20 23:15 ` Michał Mirosław
2011-04-20 8:32 ` David Miller
2011-04-27 4:59 ` Rusty Russell [this message]
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