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Date:      Wed, 25 Nov 2020 22:24:39 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 251347] NFS hangs on client side when mounted from outside in Jail Tree (BROKEN NFS SERVER OR MIDDLEWARE)
Message-ID:  <bug-251347-227-rd3GgnqPLV@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-251347-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-251347-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D251347

Konstantin Belousov <kib@FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |kib@FreeBSD.org

--- Comment #5 from Konstantin Belousov <kib@FreeBSD.org> ---
First, switch to 12.2.  There were fixes for some NFS client issues that mi=
ght
be
relevant (could be not).

I am sure that NFS client is not VNET-aware, i.e. it does not switch context
to the proper VNET as needed.  Esp. when offloading async io to nfsiod daem=
ons.
In other words, I do not expect the scenario 3 to work.

For the second scenario, nullfs remount of NFS mount, VNET jail should be
irrelevant.  When the hang occurs, gather the procstat -kk -a output (on the
host).  Also it might worth a try to '-o nocache' for nullfs mounts, I reme=
mber
there were some problems with nullfs+nfs+caching.

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