* tcp offload with ip or tcp options
@ 2011-05-12 12:08 James Harper
2011-05-12 12:18 ` Ian Campbell
0 siblings, 1 reply; 3+ messages in thread
From: James Harper @ 2011-05-12 12:08 UTC (permalink / raw)
To: xen-devel
Is TCP LSO and/or checksum offload supported when IP or TCP options are
present in the packet? Or is that dependent on the underlying hardware
(for which there is no way to indicate to DomU I think)
Thanks
James
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: tcp offload with ip or tcp options
2011-05-12 12:08 tcp offload with ip or tcp options James Harper
@ 2011-05-12 12:18 ` Ian Campbell
2011-05-12 12:19 ` James Harper
0 siblings, 1 reply; 3+ messages in thread
From: Ian Campbell @ 2011-05-12 12:18 UTC (permalink / raw)
To: James Harper; +Cc: xen-devel@lists.xensource.com
On Thu, 2011-05-12 at 13:08 +0100, James Harper wrote:
> Is TCP LSO and/or checksum offload supported when IP or TCP options are
> present in the packet? Or is that dependent on the underlying hardware
> (for which there is no way to indicate to DomU I think)
I think it ought to work.
Until recently Linux netback might not have included enough bytes in the
Linux part of an SKB to cover TCP/IP headers including options. That's
fixed in xen/stable-2.6.32.x though via 0cbb2dd6d518 and it was fixed
already in the version which went upstream in 2.6.39. I don't know how
versions before that actually behave in practice though.
Ian.
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2011-05-12 12:19 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2011-05-12 12:08 tcp offload with ip or tcp options James Harper
2011-05-12 12:18 ` Ian Campbell
2011-05-12 12:19 ` James Harper
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).