From owner-freebsd-current@freebsd.org  Sat May  2 00:20:13 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 C1D572B41EE
 for <freebsd-current@mailman.nyi.freebsd.org>;
 Sat,  2 May 2020 00:20:13 +0000 (UTC)
 (envelope-from mmacy@freebsd.org)
Received: from smtp.freebsd.org (smtp.freebsd.org
 [IPv6:2610:1c1:1:606c::24b:4])
 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
 server-signature RSA-PSS (4096 bits)
 client-signature RSA-PSS (4096 bits) client-digest SHA256)
 (Client CN "smtp.freebsd.org",
 Issuer "Let's Encrypt Authority X3" (verified OK))
 by mx1.freebsd.org (Postfix) with ESMTPS id 49DVBP4Xwzz4JJk
 for <freebsd-current@freebsd.org>; Sat,  2 May 2020 00:20:13 +0000 (UTC)
 (envelope-from mmacy@freebsd.org)
Received: from mail-lf1-f42.google.com (mail-lf1-f42.google.com
 [209.85.167.42])
 (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits))
 (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK))
 (Authenticated sender: mmacy)
 by smtp.freebsd.org (Postfix) with ESMTPSA id 5C3C39CF0
 for <freebsd-current@freebsd.org>; Sat,  2 May 2020 00:20:13 +0000 (UTC)
 (envelope-from mmacy@freebsd.org)
Received: by mail-lf1-f42.google.com with SMTP id 188so5096127lfa.10
 for <freebsd-current@freebsd.org>; Fri, 01 May 2020 17:20:13 -0700 (PDT)
X-Gm-Message-State: AGi0PuZP3EBjNtH2J1Yxs8TtJl4to8uU1l812pi/yXDGsfzEQVAbfNJ2
 wQb+79NqiVm2APC4OVRXJsnP1FB5bARVrlbsf28=
X-Google-Smtp-Source: APiQypI1rIL4NvYn13H154X5XhqdG+2hCLpqU7Bj3SoiFoNyHV7PNPYllLp0/2Q/6eH1RHgcviWpQxJy1rlhmCCojIA=
X-Received: by 2002:a05:6512:31ca:: with SMTP id
 j10mr3820926lfe.74.1588378811941; 
 Fri, 01 May 2020 17:20:11 -0700 (PDT)
MIME-Version: 1.0
References: <9592fb23-ef97-f0a2-5968-f10ae404e761@gmail.com>
In-Reply-To: <9592fb23-ef97-f0a2-5968-f10ae404e761@gmail.com>
From: Matthew Macy <mmacy@freebsd.org>
Date: Fri, 1 May 2020 17:20:00 -0700
X-Gmail-Original-Message-ID: <CAPrugNpXXPjdoLsszZwwkpooDrt44gfguJfvK4qQWEUSD7+hZg@mail.gmail.com>
Message-ID: <CAPrugNpXXPjdoLsszZwwkpooDrt44gfguJfvK4qQWEUSD7+hZg@mail.gmail.com>
Subject: Re: vfs.zfs.min_auto_ashift and OpenZFS
To: Graham Perrin <grahamperrin@gmail.com>
Cc: freebsd-current <freebsd-current@freebsd.org>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.29
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: Sat, 02 May 2020 00:20:13 -0000

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.

-M

On Fri, May 1, 2020 at 11:04 AM Graham Perrin <grahamperrin@gmail.com> wrot=
e:
>
> In my sysctl.conf:
>
> vfs.zfs.min_auto_ashift=3D12
>
> =E2=80=93 if I recall correctly, the line was written automatically when =
I
> installed FreeBSD-CURRENT a year or so ago.
>
> With OpenZFS enabled:
>
> root@momh167-gjp4-8570p:~ # sysctl vfs.zfs.min_auto_ashift
> sysctl: unknown oid 'vfs.zfs.min_auto_ashift'
>
> Should I have a different line in sysctl.conf, or is
> vfs.zfs.min_auto_ashift not required with OpenZFS?
>
> Hardware: HP EliteBook 8570p, circa 2013
> <https://web.archive.org/web/20150906211950/http://www8.hp.com:80/h20195/=
v2/GetPDF.aspx/c04163744.pdf>
>
> _______________________________________________
> freebsd-current@freebsd.org mailing list
> https://lists.freebsd.org/mailman/listinfo/freebsd-current
> To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org=
"