From: Eric Dumazet <eric.dumazet@gmail.com>
To: Changli Gao <xiaosuo@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>,
Tom Herbert <therbert@google.com>, Jiri Pirko <jpirko@redhat.com>,
Fenghua Yu <fenghua.yu@intel.com>,
Junchang Wang <junchangwang@gmail.com>,
Xinan Tang <xinan.tang@intel.com>,
netdev@vger.kernel.org
Subject: Re: [PATCH] net: increase skb->users instead of skb_clone()
Date: Thu, 16 Dec 2010 08:50:08 +0100 [thread overview]
Message-ID: <1292485808.2603.78.camel@edumazet-laptop> (raw)
In-Reply-To: <AANLkTi=BX8AMaiwV3aDAVqRA=br00eRo-42vPNwZfwS6@mail.gmail.com>
Le jeudi 16 décembre 2010 à 15:23 +0800, Changli Gao a écrit :
> On Thu, Dec 16, 2010 at 3:18 PM, Eric Dumazet <eric.dumazet@gmail.com> wrote:
> >
> > You beat me, but I was thinking of a different way, adding a new
> > pt_prev->xmit_func(), handling all the details (no need for atomic ops
> > on skb users if packet is not delivered at all).
> >
> > By the way, your patch is not 100% safe/OK, because af_packet rcv()
> > handler writes on skb (skb_pull() and all)
> >
>
> But af_packet_rcv() restores skbs at last.
>
> if (skb_head != skb->data && skb_shared(skb)) {
> skb->data = skb_head;
> skb->len = skb_len;
> }
>
Thats right, your patch seems fine, thanks !
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
next prev parent reply other threads:[~2010-12-16 7:50 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-16 5:57 [PATCH] net: increase skb->users instead of skb_clone() Changli Gao
2010-12-16 7:18 ` Eric Dumazet
2010-12-16 7:23 ` Changli Gao
2010-12-16 7:50 ` Eric Dumazet [this message]
2010-12-16 14:20 ` Junchang Wang
2010-12-16 14:30 ` Eric Dumazet
2010-12-16 14:05 ` Junchang Wang
2010-12-16 14:12 ` Changli Gao
2010-12-16 14:36 ` Junchang Wang
2010-12-16 14:18 ` Eric Dumazet
2010-12-16 14:31 ` Junchang Wang
2010-12-16 14:41 ` Eric Dumazet
2010-12-16 14:43 ` Changli Gao
2010-12-17 0:24 ` Junchang Wang
2010-12-20 5:50 ` David Miller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1292485808.2603.78.camel@edumazet-laptop \
--to=eric.dumazet@gmail.com \
--cc=davem@davemloft.net \
--cc=fenghua.yu@intel.com \
--cc=jpirko@redhat.com \
--cc=junchangwang@gmail.com \
--cc=netdev@vger.kernel.org \
--cc=therbert@google.com \
--cc=xiaosuo@gmail.com \
--cc=xinan.tang@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox