From: Alexei Starovoitov <ast@plumgrid.com>
To: Daniel Borkmann <daniel@iogearbox.net>
Cc: David Miller <davem@davemloft.net>,
jhs@mojatatu.com, jiri@resnulli.us, netdev@vger.kernel.org
Subject: Re: [PATCH net-next] tc: fix tc actions in case of shared skb
Date: Tue, 14 Jul 2015 08:46:27 -0700 [thread overview]
Message-ID: <55A52ED3.8090003@plumgrid.com> (raw)
In-Reply-To: <55A4E479.8080101@iogearbox.net>
On 7/14/15 3:29 AM, Daniel Borkmann wrote:
> One other thing that comes to mind, not sure if it's worth it though,
> would be to split the skb->tc_verd's TC_NCLS itself into TC_NCLS/TC_NACT,
> so that you can go into the classifier, but skip the action part.
>
> Since in tcf_action_exec(), we already test for that, you might be able
> to add this with no extra cost. pktgen would then need to tag its skb
> with TC_NACT, so that you'll always return with TC_ACT_OK. And if you
> really would want to test tc actions, then w/o pktgen bursting ...
imo it's even uglier. Majority of the actions are fine with shared skb,
so blank disable is no good at all.
The cost of 'unlikely(is_pktgen_shared_skb' is tiny, but fine,
we dug up the dirt enough.
I'm taking option 3 (do nothing) at this point.
next prev parent reply other threads:[~2015-07-14 15:46 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-11 0:10 [PATCH net-next] tc: fix tc actions in case of shared skb Alexei Starovoitov
2015-07-12 4:29 ` David Miller
2015-07-13 19:47 ` Alexei Starovoitov
2015-07-13 20:04 ` David Miller
2015-07-13 20:17 ` Alexei Starovoitov
2015-07-13 20:55 ` Daniel Borkmann
2015-07-13 22:26 ` Alexei Starovoitov
2015-07-14 10:29 ` Daniel Borkmann
2015-07-14 11:57 ` Jamal Hadi Salim
2015-07-14 12:19 ` Daniel Borkmann
2015-07-14 15:46 ` Alexei Starovoitov [this message]
2015-07-14 22:34 ` David Miller
2015-07-14 23:08 ` Alexei Starovoitov
2015-07-15 0:58 ` John Fastabend
2015-07-15 1:01 ` Alexei Starovoitov
2015-07-13 13:13 ` Jamal Hadi Salim
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