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Date:      Sun, 01 Nov 2020 19:17:01 +0000
From:      bugzilla-noreply@freebsd.org
To:        virtualization@FreeBSD.org
Subject:   [Bug 250770] AWS EC2 system freezes up possibly associated with NFS (EFS)
Message-ID:  <bug-250770-27103-vw9Esv9VnU@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-250770-27103@https.bugs.freebsd.org/bugzilla/>
References:  <bug-250770-27103@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D250770

--- Comment #5 from Gunther Schadow <raj@gusw.net> ---
Thank you so much for the feedback.=20

I am up over 10 hours now. So it looks like the spell has finally been brok=
en!

So, it may well be that the minorversion=3D1 is necessary for the oneopenow=
n to
work. I suggest updating the man page. It currently reads:

             minorversion=3D<value>
                     Override the default of 0 for the minor version of the
                     NFS Version 4 protocol.  The only minor version curren=
tly
                     supported is 1.  This option is only meaningful when u=
sed
                     with the nfsv4 option.

             oneopenown
                     Make a minor version 1 of the NFS Version 4 protocol
                     mount use a single OpenOwner for all Opens.  This may =
be
                     useful for a server with a very low limit on OpenOwner=
s,
                     such as AmazonEFS.  It can only be used with an NFSv4.1
                     mount.  It may not work correctly when Delegations are
                     being issued by a server, but note that the AmazonEFS
                     server does not issued delegations at this time.

             pnfs    Enable support for parallel NFS (pNFS) for minor versi=
on
                     1 of the NFS Version 4 protocol.  This option is only
                     meaningful when used with the minorversion option.

The clear statement of pnfs "This option is only meaningful when used with =
the
minorversion option." would remove all ambiguity.

I do wonder also about the speed compared to a "native" Amazon Linux mount =
-t
efs mount. I feel like it's slower.

My throughput allocation utilization is barely a blip, not an issue for me.=
=20

I personally can't really use your efs automounter because I need to be in
precise control of the mount /usr during boot. I wonder if more improvements
can be gleaned from the mount_efs Linux code.

Anyway, it looks more and more like this is a no-bug and just somehow a lac=
k of
clear and conspiciously placed documentation and warning. This week, if not=
hing
else fails, I will close this issue and I will update all the places where I
had left some negative commments. I love FreeBSD after all. Thank you.

--=20
You are receiving this mail because:
You are the assignee for the bug.=



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