From owner-freebsd-stable@FreeBSD.ORG  Wed Oct  9 14:25:19 2013
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115])
 (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTP id C811B12C
 for <freebsd-stable@freebsd.org>; Wed,  9 Oct 2013 14:25:19 +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 ECB6D2B0B
 for <freebsd-stable@freebsd.org>; Wed,  9 Oct 2013 14:25:18 +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:Subject:To;
 bh=j29saduiph4H5/3LueSBFFjz7/WJwSl24tOIHBA4nkc=; 
 b=M+mOqkm9tvgrEEaRSM3K8+tqGjS0innSqLT5q84pT3dsFJLT465dD90y7CL635WGQlUMISQ2LGkt3I4jx6OHTvc9dUD8VVS+P9cN620CkqkDX1BjpnYf7Fvfr8Xe/5hCgY86PnQmF2nqLhyMwbx7VhLeuP4ncIr12Mox9mb6Wbw=;
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 1VTuhN-000OBo-Pp
 for freebsd-stable@freebsd.org; Wed, 09 Oct 2013 15:25:14 +0100
Received: from petefrench by dilbert.ingresso.co.uk with local (Exim 4.80.1
 (FreeBSD)) (envelope-from <petefrench@ingresso.co.uk>)
 id 1VTuhN-0006UM-73
 for freebsd-stable@freebsd.org; Wed, 09 Oct 2013 15:25:13 +0100
To: freebsd-stable@freebsd.org
Subject: hast and zfs trim possibly causing some problems in 9.2
Message-Id: <E1VTuhN-0006UM-73@dilbert.ingresso.co.uk>
From: Pete French <petefrench@ingresso.co.uk>
Date: Wed, 09 Oct 2013 15:25:13 +0100
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: Wed, 09 Oct 2013 14:25:19 -0000

I just had a machine fall over on my for the first time in ages - one
of a pair of machine we have running hast with zfs on top. I havent
got any concrete evidence of what made it die as yet, but I
did notice the logifles filling up with thoursands of lines like this
just prior to the crash:

serpentine-active hastd[1522]: [serp1] (primary) Remote request failed (Operation not supported): DELETE(26847744000, 1536).

so I am guessing taht is ZFS trying to send a trim command to hast, and hast
does not support it. Have disabled zfs trim now, but thought it was
worth mentioning - I would have not expected zfs to be trying to issue
a trim command to an underlying device which doesnt support it. These
machines were rock solid under 8, and the only chnage I can see with 9 is
the trim support being added.

cheers,

-pete.