linux-kernel - Re: [PATCH net v2] net: sched: do not requeue a NULL skb

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Message-ID: <1460399456.6473.566.camel@edumazet-glaptop3.roam.corp.google.com>
Date:	Mon, 11 Apr 2016 11:30:56 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Cong Wang <xiyou.wangcong@...il.com>
Cc:	Lars Persson <lars.persson@...s.com>,
	Lars Persson <larper@...s.com>,
	Linux Kernel Network Developers <netdev@...r.kernel.org>,
	Jamal Hadi Salim <jhs@...atatu.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net v2] net: sched: do not requeue a NULL skb

On Mon, 2016-04-11 at 11:26 -0700, Eric Dumazet wrote:
> On Mon, 2016-04-11 at 11:02 -0700, Cong Wang wrote:
> 
> > I am fine with either way as long as the loop stops on failure.


Note that skb that could not be validated is already freed.

So I do not see any value from stopping the loop, since
we need to schedule the queue to avoid tx hang.

Just process following skb if there is one, fact that skb is sent or
dropped does not matter.