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From:   "NeilBrown" <neilb@suse.de>
To:     "Mike Javorski" <mike.javorski@gmail.com>
Cc:     "Chuck Lever III" <chuck.lever@oracle.com>,
        "Linux NFS Mailing List" <linux-nfs@vger.kernel.org>
Subject: Re: NFS server regression in kernel 5.13 (tested w/ 5.13.9)
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Date:   Mon, 23 Aug 2021 08:00:27 +1000
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On Sun, 22 Aug 2021, Mike Javorski wrote:
> 5.12.15-arch1:
> ===============
> 14723 137 0.00921938
> 
> 5.13.12-arch1: (no freezes)
> ===============
> 15333 206 0.013257
> 
> 5.13.12-arch1: (with freezes)
> ===============
> 9230 299 0.0313779
> 
> So a decent bump w/ 5.13, and even more with the freezes.

Thanks.  9->13 isn't as much as I was hoping for, but it might still be
significant. 

> This machine is an older Opteron server w/ nforce networking. Not sure
> how much offloading it actually does.

The tcpdump showed the server sending very large packets, which means
that it is at least doing TCP segmentation offload and checksum offload.
Those are very common these days.

Thanks,
NeilBrown