From: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
To: Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: Yuval Shaia <yuval.shaia-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>,
Yann Droneaud <ydroneaud-RlY5vtjFyJ3QT0dZR+AlfA@public.gmane.org>,
linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH] IB/ipoib: CSUM support in connected mode
Date: Thu, 30 Jul 2015 11:15:38 -0600 [thread overview]
Message-ID: <20150730171538.GA25282@obsidianresearch.com> (raw)
In-Reply-To: <55BA47F0.5080504-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
On Thu, Jul 30, 2015 at 11:51:12AM -0400, Doug Ledford wrote:
> In its current state, I have my doubts about this patch. However, it
> seems to me that this should be relatively easy to fix in such a way
> that you get 90%+ of the performance benefit, and can turn it on by
> default, and we don't cause any problems.
The best way to implement this is to leverage all the checksum
offload work people did for virtualization.
Forward the checksum offload status through the RC connection and
recover it on the other side.
Then the far side stack will know it is dealing with a partial
checksum packet and will properly regenerate the checksum if it
re-transmits.
ie doing it this way doesn't totally break the netstack :)
Jason
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next prev parent reply other threads:[~2015-07-30 17:15 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-30 11:46 [PATCH] IB/ipoib: CSUM support in connected mode Yuval Shaia
[not found] ` <1438256764-9077-1-git-send-email-yuval.shaia-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2015-07-30 13:58 ` Yann Droneaud
[not found] ` <1438264693.9344.19.camel-RlY5vtjFyJ3QT0dZR+AlfA@public.gmane.org>
2015-07-30 15:20 ` Yuval Shaia
2015-07-30 15:51 ` Doug Ledford
[not found] ` <55BA47F0.5080504-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-07-30 17:15 ` Jason Gunthorpe [this message]
[not found] ` <20150730171538.GA25282-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-07-30 20:46 ` Yuval Shaia
2015-07-30 21:00 ` Jason Gunthorpe
[not found] ` <20150730210018.GA32451-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-11-18 20:27 ` Yuval Shaia
2015-11-23 18:29 ` Jason Gunthorpe
2015-07-30 20:37 ` Yuval Shaia
2015-11-18 10:46 ` Yuval Shaia
2015-11-24 9:45 ` Yann Droneaud
[not found] ` <1448358314.19858.13.camel-RlY5vtjFyJ3QT0dZR+AlfA@public.gmane.org>
2015-11-24 18:59 ` Jason Gunthorpe
2015-07-30 16:38 ` Bart Van Assche
[not found] ` <55BA531E.6060403-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
2015-07-30 20:09 ` Yuval Shaia
2015-07-31 2:03 ` Bart Van Assche
[not found] ` <55BAD76A.1070700-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
2015-09-03 20:29 ` Doug Ledford
[not found] ` <55E8ADB9.4090900-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-09-06 11:27 ` Yuval Shaia
2015-11-18 10:27 ` Yuval Shaia
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