linux-kernel - Re: regression: nfs mount (even idle) eventually hangs server

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Message-ID: <36902a3dd6ee1a8656548ff5b5eadb88245e2799.camel@gmx.de>
Date:   Thu, 22 Dec 2022 05:44:25 +0100
From:   Mike Galbraith <efault@....de>
To:     Chuck Lever III <chuck.lever@...cle.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Linux NFS Mailing List <linux-nfs@...r.kernel.org>
Subject: Re: regression: nfs mount (even idle) eventually hangs server

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=4.2.

> 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