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Date: Fri, 24 Jul 2015 10:20:52 +0300
From: Slawa Olhovchenkov <slw@zxy.spb.ru>
To: d@delphij.net
Cc: Stari Karp <starikarp@yandex.com>, freebsd-stable@freebsd.org
Subject: Re: freebsd downgrade
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On Thu, Jul 23, 2015 at 04:51:07PM -0700, Xin Li wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA512
> 
> On 07/23/15 16:21, Stari Karp wrote:
> > Hi!
> > 
> > I had a problems with FreeBSD 10.2-BETA2. I used freebsd-update
> > ugrade and update FreeBSD 10.1-RELEASE. Is it possible to downgrade
> > BETA2 to 10.1-RELEASE with freebsd-update upgrade -r 10.1-RELEASE,
> > please?
> 
> It's not supported (because you may be running binaries that depends
> on new kernel).
> 
> What kind of problems did you have?  Please let re@ know so we can get
> them fixed.

For me -- degradate network performance, about 30%.
I am do verification now, by downgrading kernel.