From owner-freebsd-current@freebsd.org  Wed Sep  9 21:40:16 2020
Return-Path: <owner-freebsd-current@freebsd.org>
Delivered-To: freebsd-current@mailman.nyi.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1])
 by mailman.nyi.freebsd.org (Postfix) with ESMTP id F346D3DD821
 for <freebsd-current@mailman.nyi.freebsd.org>;
 Wed,  9 Sep 2020 21:40:16 +0000 (UTC) (envelope-from slw@zxy.spb.ru)
Received: from zxy.spb.ru (zxy.spb.ru [195.70.199.98])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 4BmwRN4MKlz3dLT;
 Wed,  9 Sep 2020 21:40:16 +0000 (UTC) (envelope-from slw@zxy.spb.ru)
Received: from slw by zxy.spb.ru with local (Exim 4.86 (FreeBSD))
 (envelope-from <slw@zxy.spb.ru>)
 id 1kG7p2-000K0n-HZ; Thu, 10 Sep 2020 00:40:08 +0300
Date: Thu, 10 Sep 2020 00:40:08 +0300
From: Slawa Olhovchenkov <slw@zxy.spb.ru>
To: Ryan Moeller <freqlabs@FreeBSD.org>
Cc: freebsd-current@freebsd.org
Subject: Re: vfs.zfs.min_auto_ashift and OpenZFS
Message-ID: <20200909214008.GB2033@zxy.spb.ru>
References: <9592fb23-ef97-f0a2-5968-f10ae404e761@gmail.com>
 <CAPrugNpXXPjdoLsszZwwkpooDrt44gfguJfvK4qQWEUSD7+hZg@mail.gmail.com>
 <37b914c8-6fb6-7c1c-9497-ae1402b8dd40@daemonic.se>
 <f00c007f-f499-0da2-0b54-465d147884c3@FreeBSD.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <f00c007f-f499-0da2-0b54-465d147884c3@FreeBSD.org>
User-Agent: Mutt/1.5.24 (2015-08-30)
X-SA-Exim-Connect-IP: <locally generated>
X-SA-Exim-Mail-From: slw@zxy.spb.ru
X-SA-Exim-Scanned: No (on zxy.spb.ru); SAEximRunCond expanded to false
X-Rspamd-Queue-Id: 4BmwRN4MKlz3dLT
X-Spamd-Bar: ----
X-Spamd-Result: default: False [-4.00 / 15.00];
 ASN(0.00)[asn:5495, ipnet:195.70.192.0/19, country:RU];
 REPLY(-4.00)[]
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.33
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
 <freebsd-current.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-current>, 
 <mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current/>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
 <mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 09 Sep 2020 21:40:17 -0000

On Wed, Sep 09, 2020 at 11:55:14AM -0400, Ryan Moeller wrote:

> 
> On 9/8/20 4:31 PM, Niclas Zeising wrote:
> > On 2020-05-02 02:20, Matthew Macy wrote:
> >> OpenZFS doesn't have the same ashift optimization logic that FreeBSD
> >> has. It's something that needs to be resolved before the code can be
> >> integrated downstream.
> >
> > So currently all pools created with OpenZFS will use 512 bit 
> > alignment, at least if the underlying storage device uses 512bit 
> > sectors (which most drives tend to do)?
> >
> > If this is the case, it feels like a pessimisation.
> >
> > Regards
> 
> 
> The vdev ashift optimizations from FreeBSD were put in OpenZFS before 
> the import into base. That sysctl does work now.

Ugly hack w/ geom_noop required again?