[Bug 260011] Unresponsive NFS mount on AWS EFS

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=260011

--- Comment #4 from Alex Dupre <ale@FreeBSD.org> ---
Thanks for the debug suggestions, I'll run those commands next time it happens
and report here.

For the records, I'm not running any additional NFS daemon and haven't anything
NFS-specific in rc.conf, it's just a plain mount, and it's not a heavily
accessed file system either.

I see you recommend to use `hard` mounts. I tried to use the `soft` mounts to
avoid the infinite hanging and inability to kill, hoping that would help in
recovering, but from what I've understood now even the hard mount point should
recover when the NFS server comes back, so the problem was really a different
one and is affecting both mount types.

Any idea why a few arguments seems to have been ignored? Does it make sense to
set higher rsize/wsize on tcp endpoints? I see that the recent efs automounter
doesn't use any of them, so probably it is not worth.

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