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Date:      Thu, 5 Apr 2018 18:29:02 +0200
From:      Ben RUBSON <ben.rubson@gmail.com>
To:        "freebsd-fs@freebsd.org" <freebsd-fs@freebsd.org>
Subject:   Re: Linux NFS client and FreeBSD server strangeness
Message-ID:  <AF5B6AB4-8BAF-4BCF-BAD1-9D28A496DADD@gmail.com>
In-Reply-To: <369fab06-6213-ba87-cc66-c9829e8a76a0@sentex.net>
References:  <369fab06-6213-ba87-cc66-c9829e8a76a0@sentex.net>

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On 04 Apr 2018 20:27, Mike Tancsa wrote:

> Note, doing something like
>
> dd if=/dev/zero of=/backup/test.bin bs=4096 count=5000000

Note that this test may not be really relevant if you have ZFS compression  
enabled.

> I too am using 9000 for the MTU.

Did you try to use smaller MTU ?
Some network adapters are known to have bugs requesting 9K mbufs for large  
MTUs.
Especially Mellanox, not sure about Chelsio though.

My 2 cents :)

Ben



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