From: Jarek Poplawski <jarkao2@gmail.com>
To: David Miller <davem@davemloft.net>
Cc: dada1@cosmosbay.com, netdev@vger.kernel.org
Subject: Re: [RFC] net: release dst entry in dev_queue_xmit()
Date: Wed, 25 Mar 2009 19:22:16 +0100 [thread overview]
Message-ID: <49CA7658.4010400@gmail.com> (raw)
In-Reply-To: <20090325.001720.238121238.davem@davemloft.net>
David Miller wrote, On 03/25/2009 08:17 AM:
> From: Eric Dumazet <dada1@cosmosbay.com>
> Date: Wed, 25 Mar 2009 08:13:30 +0100
>
>> If done in dev_hard_start_xmit(), skb could be requeued (because of
>> NETDEV_TX_BUSY). Then if requeued, maybe at this time, dst being
>> NULL is not a problem ?
>
> Usually it should be OK because the packet schedulers have
> a sort-of one-behind state that allows them to reinsert
> the SKB into their queue datastructures without reclassifying.
Actually, since David has dumped requeuing there is no reinserting;
this last one "requeued" skb is buffered at the top in q->gso_skb
and waiting for better times.
Jarek P.
next prev parent reply other threads:[~2009-03-25 18:22 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-20 11:40 [RFC] net: release dst entry in dev_queue_xmit() Eric Dumazet
2009-03-20 14:10 ` Neil Horman
2009-03-25 6:43 ` David Miller
2009-03-25 7:13 ` Eric Dumazet
2009-03-25 7:17 ` David Miller
2009-03-25 18:22 ` Jarek Poplawski [this message]
2009-03-25 18:41 ` Eric Dumazet
2009-03-25 19:18 ` Jarek Poplawski
2009-03-25 19:40 ` Eric Dumazet
2009-03-25 19:54 ` Jarek Poplawski
2009-03-25 20:28 ` Eric Dumazet
2009-03-25 21:12 ` Jarek Poplawski
2009-03-25 21:20 ` Patrick McHardy
2009-05-12 8:12 ` [PATCH] net: release dst entry in dev_hard_start_xmit() Eric Dumazet
2009-05-12 8:21 ` Eric Dumazet
2009-05-12 19:26 ` [PATCH, v2] " Eric Dumazet
2009-05-19 5:19 ` David Miller
2009-05-19 5:44 ` Eric Dumazet
2009-05-19 19:44 ` Eric Dumazet
2009-05-19 21:09 ` Jarek Poplawski
2009-05-19 21:21 ` Eric Dumazet
2009-05-19 21:24 ` David Miller
2009-05-12 19:27 ` [PATCH] " Jarek Poplawski
2009-05-12 19:44 ` Eric Dumazet
2009-05-12 20:05 ` Jarek Poplawski
2009-05-12 20:24 ` Jarek Poplawski
2009-05-12 20:52 ` Eric Dumazet
2009-05-12 20:59 ` Jarek Poplawski
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