From:   Jason Tibbitts <tibbs@math.uh.edu>
To:     Trond Myklebust <trondmy@hammerspace.com>
Cc:     "Anna.Schumaker\@netapp.com" <Anna.Schumaker@netapp.com>,
        "linux-nfs\@vger.kernel.org" <linux-nfs@vger.kernel.org>,
        "Chuck.Lever\@oracle.com" <Chuck.Lever@oracle.com>
Subject: Re: Need help debugging NFS issues new to 4.20 kernel
References: <ufaimyearlx.fsf@epithumia.math.uh.edu>
        <eff194a660ce562753d0112cdf6b1aacc5aa5dfb.camel@hammerspace.com>
        <ufak1isms71.fsf@epithumia.math.uh.edu>
Date:   Tue, 05 Feb 2019 12:12:45 -0600
In-Reply-To: <ufak1isms71.fsf@epithumia.math.uh.edu> (Jason L. Tibbitts, III's
        message of "Fri, 25 Jan 2019 13:51:30 -0600")
Message-ID: <87ftt2cdeq.fsf@hippogriff.math.uh.edu>
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>>>>> "JLT" == Jason L Tibbitts <tibbs@math.uh.edu> writes:

JLT> I wonder, though; is that likely to be the root of the problem I'm
JLT> seeing?  The commit description talks about this as a performance
JLT> regression, but I'm seeing a complete loss of NFS functionality.

It turns out that 4.20.6 (which has the patch in question) does not
appear to solve my issue.  At least, I've still had a few complete NFS
hangups on machines running 4.20.6 though I haven't had a chance to
closely inspect one yet.

As before, any hints about how I could best debug this issue would be
appreciated.

 - J<