From owner-freebsd-stable@FreeBSD.ORG  Fri Oct 11 10:27:44 2013
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTP id 895E4549;
 Fri, 11 Oct 2013 10:27:44 +0000 (UTC)
 (envelope-from petefrench@ingresso.co.uk)
Received: from constantine.ingresso.co.uk (constantine.ingresso.co.uk
 [IPv6:2a02:b90:3002:e550::3])
 (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by mx1.freebsd.org (Postfix) with ESMTPS id 8C6E72737;
 Fri, 11 Oct 2013 10:27:43 +0000 (UTC)
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;
 d=ingresso.co.uk; s=x; 
 h=Date:From:Message-Id:In-Reply-To:Cc:Subject:To;
 bh=T1GljKX6vejRsMNzf6bKUugOzI46uB9RZnhdsNSqAPk=; 
 b=ePtL5xAhvKRRpWZm/fi4PTUF+SYH33b1jMNvWF47j4Ox9gs9XJ94N8TVnPksMGvOGnL5PQ/mCv/YWwlOqfN+0V8T3PTEFRB+sJ7yvO4UqOYiuk4B3+6JFw7twxkOiIDWI0zdTfDXBxsT+3OcUJko4PeysYeF7qa45SbsVE5BK78=;
Received: from dilbert.london-internal.ingresso.co.uk ([10.64.50.6]
 helo=dilbert.ingresso.co.uk)
 by constantine.ingresso.co.uk with esmtps (TLSv1:DHE-RSA-AES256-SHA:256)
 (Exim 4.80.1 (FreeBSD)) (envelope-from <petefrench@ingresso.co.uk>)
 id 1VUZwW-000Ls8-I7; Fri, 11 Oct 2013 11:27:36 +0100
Received: from petefrench by dilbert.ingresso.co.uk with local (Exim 4.80.1
 (FreeBSD)) (envelope-from <petefrench@ingresso.co.uk>)
 id 1VUZwW-0002TR-Br; Fri, 11 Oct 2013 11:27:36 +0100
To: killing@multiplay.co.uk, trociny@FreeBSD.org
Subject: Re: hast and zfs trim possibly causing some problems in 9.2
In-Reply-To: <20131010180936.GP44942@gmail.com>
Message-Id: <E1VUZwW-0002TR-Br@dilbert.ingresso.co.uk>
From: Pete French <petefrench@ingresso.co.uk>
Date: Fri, 11 Oct 2013 11:27:36 +0100
Cc: freebsd-stable@freebsd.org, petefrench@ingresso.co.uk
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-stable>,
 <mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
 <mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 11 Oct 2013 10:27:44 -0000

> If the device on the secondary node does not supports DELETE, but the
> device on the primary does, HAST will report to ZFS that DELETE
> succeeded (although it failed on the secondary), and ZFS will not
> disable TRIM. Pete, isn't this your case?

Afraid not, both machines are running normal "spinning rust" hard
drives as the actual storage layer, so there is nothing TRIM capable
anywhere.

I didnt get much chnace to look at this yesterday, but am looking at the logs
again now, and I see these messages right up to the time the machine
fell over. That machine had been up for a long time, and it was still logging
these messages, so it looks very much as if ZFS did not stop trying to
issue the TRIM.

-pete.