Received-SPF: pass (google.com: domain of linux-nfs-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Message-ID: <36902a3dd6ee1a8656548ff5b5eadb88245e2799.camel@gmx.de>
Subject: Re: regression: nfs mount (even idle) eventually hangs server
From:   Mike Galbraith <efault@gmx.de>
To:     Chuck Lever III <chuck.lever@oracle.com>
Cc:     LKML <linux-kernel@vger.kernel.org>,
        Linux NFS Mailing List <linux-nfs@vger.kernel.org>
Date:   Thu, 22 Dec 2022 05:44:25 +0100
In-Reply-To: <1A404CDB-95A8-4D04-B76B-91D4F063B489@oracle.com>
References: <65ed34338c69cb034295f2c9cbe0af684d65d30f.camel@gmx.de>
         <360f3dcfb6cfbefdbcc42fc84c660995142a8645.camel@gmx.de>
         <241c118c2fb60df744bbe351387fc29a34ff6ab9.camel@gmx.de>
         <f533c2e38c0619ea0c3b4346d1c7c99c5ae2122b.camel@gmx.de>
         <1A404CDB-95A8-4D04-B76B-91D4F063B489@oracle.com>
Content-Type: text/plain; charset="UTF-8"
User-Agent: Evolution 3.42.4 
MIME-Version: 1.0
Content-Transfer-Encoding: quoted-printable
UI-OutboundReport: notjunk:1;M01:P0:DMZZOEW2BCo=;Y+DP8BZtE3rTL3IOMC4eI1f4v3i
 8fjzzmmSwvkNdHyuTFAGM5bL2D2V3mMB9zVEm/kNqpctkOLcKmHqad65IEU3F3xb59L1laMzB
 57z4+5ScgGaAoJ/fFi3RpI5uP1Nw1rwsDmDyHWR/Qz6rvFnRXLSOHn/m6eofiSofqWSwQZe0i
 5sZ2Fgx2Xyx2BcXiejQANzKAcnMUirgMjES3S0tBZTcy7j7BSzWJZqc5PJziwTNbHtKnOcId7
 Vy4wflcJY665cI5SMqmIUiQ6V5igOVFf1XhGLAyhEWARkjBxWccS6GfMKFfG+LV88T7moRQd7
 y23ug80Dd86nvEz4au/QnW83Q9edwn9Mw4PqBOzI1felBBRbpRHEt6dnghensldHhwb0KovsJ
 03IZ45zY6Tv4WQbGa7/yaxixVXq4bisaUk6fCrnTw5QFGzPuYfUP3n47vhKaOML69NWgCWYzE
 BtlVdJtYd7uRu2rFyibvOux/pu9CKjnZLPyzFkMmd1yWEVZMCtHPgoXd0nhAopJTzTr9c+PAl
 uaDtJj2S/iNEjuF+hRGrw7Sf30mCfpAqEqhAvnn6YHewZ7KYX6O1JYTpUuOnrKLgIBHTodioT
 m/FmtghyAWb4N8vL/F2JafwCmPpwpJEZoqRSAfjISaG/cNrWrBEXQGiT+n5y39jtc6v//BnJZ
 y6j1d2rmr9JTHv9ufYpFUzB2P32MYq4ihHjwtrLDMovCBsGRB7kCuGeSBAtTebvVPLPaxoWiN
 Ukf6dZbJrQww4fO6pqkLnJEmtavNRu6XiaYQ2tWZ1PNHq1MgAw+bzCm+yWhIlzoPsbroU/bDc
 PXBL0smyF2IbKAeGRZ4vjGEoH6kQ+Pouo45fF+BiwtFb0m+WzHn/YmFicJpK75rHmnpu8P/rJ
 9UaY/5TNe+vpSktrqR3uHoHFe+BsJummRBkQNBuFLjTxHJtUGuHg3aRYxshCb1C/OFkiqUNMZ
 pNgLqkbhuu+eV+qWY8prUNqgWLk=
Precedence: bulk

On Thu, 2022-12-22 at 04:28 +0000, Chuck Lever III wrote:
>
> Hi Mike-

Greetings,

> I'm guessing your client mounts with NFSv4.x.

Yes, mount says vers=3D4.2.

> We've been chasing a similar problem for a few months, but for
> lack of a solid reproducer, it has remained elusive.
>
> We believe the problem was introduced between 5.19 and 6.0. If
> you have a fairly reliable way to trigger the server hang, then
> maybe a bisect would be possible?

The 'solid' reproducer attribute is a bit of a problem, why I was
taking potshots at it.  I'll try to sneak up on it.

	-Mike