From owner-freebsd-questions@FreeBSD.ORG  Sat Jul 20 10:31:33 2013
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by hub.freebsd.org (Postfix) with ESMTP id B9941157
 for <freebsd-questions@freebsd.org>; Sat, 20 Jul 2013 10:31:33 +0000 (UTC)
 (envelope-from peo@intersonic.se)
Received: from neonpark.inter-sonic.com (neonpark.inter-sonic.com
 [212.247.8.98]) by mx1.freebsd.org (Postfix) with ESMTP id 80F27CB6
 for <freebsd-questions@freebsd.org>; Sat, 20 Jul 2013 10:31:33 +0000 (UTC)
X-Virus-Scanned: amavisd-new at BSDLabs AB
Message-ID: <51EA65C8.8060607@intersonic.se>
Date: Sat, 20 Jul 2013 12:26:16 +0200
From: Per olof Ljungmark <peo@intersonic.se>
Organization: Intersonic AB
User-Agent: Mozilla/5.0 (X11; FreeBSD amd64;
 rv:17.0) Gecko/20130630 Thunderbird/17.0.7
MIME-Version: 1.0
To: aurfalien <aurfalien@gmail.com>
Subject: Re: ZFS trim patches
References: <6BB846C4-0D41-4CD4-81C4-A0A44FA40FE5@gmail.com>
In-Reply-To: <6BB846C4-0D41-4CD4-81C4-A0A44FA40FE5@gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Cc: FreeBSD Questions <freebsd-questions@freebsd.org>
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 20 Jul 2013 10:31:33 -0000

On 2013-07-20 07:25, aurfalien wrote:
> Hi,
> 
> Is this;
> 
> http://lists.freebsd.org/pipermail/freebsd-current/2012-September/036777.html
> 
> ... available in the form of a patch for stable rels?
> 
> Its ZFS TRIM support.
> 

According to /usr/src/UPDATING, yes:


20130605:
        Added ZFS TRIM support which is enabled by default. To disable
        ZFS TRIM support set vfs.zfs.trim.enabled=0 in loader.conf.

        Creating new ZFS pools and adding new devices to existing pools
        first performs a full device level TRIM which can take a significant
        amount of time. The sysctl vfs.zfs.vdev.trim_on_init can be set to 0
        to disable this behaviour.

        ZFS TRIM requires the underlying device support BIO_DELETE which
        is currently provided by methods such as ATA TRIM and SCSI UNMAP
        via CAM, which are typically supported by SSD's.

        Stats for ZFS TRIM can be monitored by looking at the sysctl's
        under kstat.zfs.misc.zio_trim.