From: Ian Campbell <Ian.Campbell@citrix.com>
To: ANNIE LI <annie.li@oracle.com>
Cc: Sander Eikelenboom <linux@eikelenboom.it>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
xen-devel <xen-devel@lists.xen.org>
Subject: Re: xennet: skb rides the rocket: 20 slots
Date: Fri, 11 Jan 2013 09:56:47 +0000 [thread overview]
Message-ID: <1357898207.9456.112.camel@zakaz.uk.xensource.com> (raw)
In-Reply-To: <50EFC079.1000601@oracle.com>
On Fri, 2013-01-11 at 07:34 +0000, ANNIE LI wrote:
> > I'm guessing that Linux already has code which can do this for you,
> > since it has a software fallback for GSO.
>
> There is "skb_gso_segment" existing to perform segmentation on skb and
> return a list of segments. From the code, it seems this function is
> specific to GSO packets, maybe it is not available to other non-gso
> large packets which requires slots is larger than MAX_SKB_FRAGS + 1". So
> for non-gso offload packets, I would go forward to write a function to
> do resegment.
Without GSO I don't think you should be seeing packets larger than the
MTU, which would normally be either ~1500 or ~9000 and fit easily within
any sensible negotiation for the max frags. I don't think you should
worry unduly about this case.
Ian.
next prev parent reply other threads:[~2013-01-11 9:56 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-04 16:28 xennet: skb rides the rocket: 20 slots Sander Eikelenboom
2013-01-07 10:55 ` Ian Campbell
2013-01-07 12:30 ` Sander Eikelenboom
2013-01-07 13:27 ` Ian Campbell
2013-01-07 14:05 ` Sander Eikelenboom
2013-01-07 14:12 ` Ian Campbell
2013-01-08 2:12 ` ANNIE LI
2013-01-08 10:05 ` Ian Campbell
2013-01-08 10:16 ` Paul Durrant
2013-01-08 20:57 ` James Harper
2013-01-08 22:04 ` Konrad Rzeszutek Wilk
2013-01-08 20:55 ` Sander Eikelenboom
2013-01-09 7:10 ` ANNIE LI
2013-01-09 15:08 ` Konrad Rzeszutek Wilk
2013-01-09 16:34 ` Ian Campbell
2013-01-09 17:05 ` Konrad Rzeszutek Wilk
2013-01-09 18:02 ` Ian Campbell
2013-01-10 11:22 ` ANNIE LI
2013-01-10 12:24 ` Sander Eikelenboom
2013-01-10 12:26 ` Ian Campbell
2013-01-10 15:39 ` Konrad Rzeszutek Wilk
2013-01-10 16:25 ` Ian Campbell
2013-01-11 7:34 ` ANNIE LI
2013-01-11 9:56 ` Ian Campbell [this message]
2013-01-11 10:09 ` Paul Durrant
2013-01-11 10:16 ` Ian Campbell
[not found] ` <50F3D269.6030601@oracle.com>
2013-03-09 12:56 ` Fwd: " Sander Eikelenboom
[not found] ` <19010312768.20130124094542@eikelenboom.it>
2013-03-09 12:57 ` Sander Eikelenboom
2013-03-10 5:22 ` ANNIE LI
2013-03-12 11:37 ` Ian Campbell
2013-03-15 5:14 ` annie li
2013-03-15 21:29 ` Sander Eikelenboom
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=1357898207.9456.112.camel@zakaz.uk.xensource.com \
--to=ian.campbell@citrix.com \
--cc=annie.li@oracle.com \
--cc=konrad.wilk@oracle.com \
--cc=linux@eikelenboom.it \
--cc=xen-devel@lists.xen.org \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.