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Subject: Re: still seeing single client NFS4ERR_DELAY / CB_RECALL
From:   Chuck Lever <chuck.lever@oracle.com>
In-Reply-To: <20200810201001.GC13266@fieldses.org>
Date:   Tue, 11 Aug 2020 09:31:07 -0400
Cc:     Linux NFS Mailing List <linux-nfs@vger.kernel.org>
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To:     Bruce Fields <bfields@fieldses.org>
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> On Aug 10, 2020, at 4:10 PM, Bruce Fields <bfields@fieldses.org> wrote:
> 
> On Mon, Aug 10, 2020 at 04:01:00PM -0400, Chuck Lever wrote:
>> Roughly the same result with this patch as with the first one. The
>> first one is a little better. Plus, I think the Solaris NFS server
>> hands out write delegations on v4.0, and I haven't heard of a
>> significant issue there. It's heuristics may be different, though.
>> 
>> So, it might be that NFSv4.0 has always run significantly slower. I
>> will have to try a v5.4 or older server to see.
> 
> Oh, OK, I was assuming this was a regression.

Me too. Looks like it is: NFSv4.0 always runs slower, but I see
it get significantly worse between v5.4 and 5.5. I will post more
quantified results soon.


--
Chuck Lever