From: Sridhar Samudrala <sri@us.ibm.com>
To: Krishna Kumar2 <krkumar2@in.ibm.com>
Cc: ak@suse.de, ashwin.chaugule@celunite.com,
David Miller <davem@davemloft.net>,
Gagan Arneja <gagan@vmware.com>,
hadi@cyberus.ca, Evgeniy Polyakov <johnpol@2ka.mipt.ru>,
netdev@vger.kernel.org, netdev-owner@vger.kernel.org,
rdreier@cisco.com, xma@us.ibm.com
Subject: Re: [WIP] [PATCH] WAS Re: [RFC] New driver API to speed up small packets xmits
Date: Wed, 16 May 2007 14:44:41 -0700 [thread overview]
Message-ID: <464B7B49.4070003@us.ibm.com> (raw)
In-Reply-To: <OFBB67F1E7.ABE3C092-ON652572DE.0015BA9F-652572DE.00164CF8@in.ibm.com>
Krishna Kumar2 wrote:
> Hi Sridhar,
>
> Sridhar Samudrala <sri@us.ibm.com> wrote on 05/17/2007 03:42:03 AM:
>
>> AFAIK, gso_skb can be a list of skb's. Can we add a list
>> to another list using __skb_queue_head()?
>> Also, if gso_skb is a list of multiple skb's, i think the
>> count needs to be decremented by the number of segments in
>> gso_skb.
>
> gso_skb is the last GSO skb that failed to be sent. This already
> segmented skb is kept "cached" and whenever the next xmit happens,
> this skb is first sent before any packets from the queue are taken
> out (otherwise out-of-order packets). So there can atmost be one
> gso_skb per device.
Yes. There can be only one gso_skb per device. But it can have more
than one segments linked together via skb->next.
Thanks
Sridhar
next prev parent reply other threads:[~2007-05-17 4:45 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <OF0CAD6D87.DBE62968-ON872572DC.0073646A-882572DC.0073BEC2@us.ibm.com>
2007-05-15 21:17 ` [RFC] New driver API to speed up small packets xmits Roland Dreier
[not found] ` <OFF5654BB8.74EC8DCB-ON872572DC.00752079-882572DC.00756B23@us.ibm.com>
2007-05-15 21:25 ` Roland Dreier
[not found] ` <OF21D475A2.5E5C88DE-ON872572DC.00763DE4-882572DC.00768A7E@us.ibm.com>
2007-05-15 21:38 ` David Miller
2007-05-15 21:32 ` David Miller
2007-05-15 22:17 ` [WIP] [PATCH] WAS " jamal
2007-05-15 22:48 ` jamal
2007-05-16 0:50 ` jamal
2007-05-16 22:12 ` Sridhar Samudrala
2007-05-16 22:52 ` jamal
2007-05-17 3:25 ` jamal
2007-05-18 12:07 ` jamal
2007-05-17 4:03 ` Krishna Kumar2
2007-05-16 21:44 ` Sridhar Samudrala [this message]
2007-05-17 5:01 ` Krishna Kumar2
[not found] ` <OF6757F56D.EE5984FD-ON872572DC.0081026C-882572DC.00814B8F@us.ibm.com>
2007-05-15 23:36 ` David Miller
2007-05-21 7:56 ` Herbert Xu
[not found] ` <OF9ABCD08D.2CD1B193-ON872572E3.007A6FC1-882572E3.007ACE1A@us.ibm.com>
2007-05-22 22:36 ` David Miller
[not found] ` <OFCF3EB7F8.9740C0C7-ON872572E3.007DADF6-882572E3.007E0E7B@us.ibm.com>
2007-05-22 23:04 ` David Miller
2007-05-22 23:12 ` Herbert Xu
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