From: Patrick McHardy <kaber@trash.net>
To: Brian Oostenbrink <Brian_Oostenbrink@pmc-sierra.com>
Cc: linux-net@vger.kernel.org, Linux Netdev List <netdev@vger.kernel.org>
Subject: Re: Re-queueing of skb in vlan_skb_recv
Date: Fri, 11 Apr 2008 14:46:35 +0200 [thread overview]
Message-ID: <47FF5DAB.1060906@trash.net> (raw)
In-Reply-To: <8A9D56C5E50F774BABE033F1710B357601084C42@BBY1EXM11.pmc_nt.nt.pmc-sierra.bc.ca>
Brian Oostenbrink wrote:
> In vlan_skb_recv, packets are generally stripped of their vlan header,
> and then re-queued via netif_rx(). Is there a reason for re-queuing
> these instead of calling netif_receive_skb() directly? On our system
> (an embedded linux router), this re-queuing has a significant
> performance penalty.
Its done to save stack space. There's currently a discussion
about making loopback use netif_receive_skb in case enough
stack is still available. Once that patch gets merged I'll
change VLAN in a similar way.
next parent reply other threads:[~2008-04-11 12:46 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <8A9D56C5E50F774BABE033F1710B357601084C42@BBY1EXM11.pmc_nt.nt.pmc-sierra.bc.ca>
2008-04-11 12:46 ` Patrick McHardy [this message]
2008-04-11 12:53 ` Re-queueing of skb in vlan_skb_recv Al Viro
2008-04-11 13:02 ` Patrick McHardy
2008-04-11 17:54 ` David Miller
2008-04-13 4:47 ` Patrick McHardy
2008-04-11 12:53 ` Jeremy Jackson
2008-04-11 13:02 ` Patrick McHardy
2008-04-11 15:44 ` Stephen Hemminger
2008-04-11 16:16 ` Patrick McHardy
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