From owner-freebsd-current@FreeBSD.ORG Fri Jun 6 13:48:00 2014 Return-Path: Delivered-To: freebsd-current@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 ESMTPS id 0DF5E552; Fri, 6 Jun 2014 13:48:00 +0000 (UTC) Received: from thyme.infocus-llc.com (server.infocus-llc.com [206.156.254.44]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (Client CN "*.infocus-llc.com", Issuer "*.infocus-llc.com" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id D423B22AE; Fri, 6 Jun 2014 13:47:59 +0000 (UTC) Received: from draco.over-yonder.net (c-75-65-60-66.hsd1.ms.comcast.net [75.65.60.66]) (using TLSv1 with cipher ADH-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by thyme.infocus-llc.com (Postfix) with ESMTPSA id 5A86437B551; Fri, 6 Jun 2014 08:42:20 -0500 (CDT) Received: by draco.over-yonder.net (Postfix, from userid 100) id 3glQ5R6L9fz8Dq; Fri, 6 Jun 2014 08:42:19 -0500 (CDT) Date: Fri, 6 Jun 2014 08:42:19 -0500 From: "Matthew D. Fuller" To: Andriy Gapon Subject: Re: ZFS secondarycache on SSD problem on r255173 Message-ID: <20140606134219.GQ33666@over-yonder.net> References: <20131017061248.GA15980@hell.ukr.net> <326B470C65A04BC4BC83E118185B935F@multiplay.co.uk> <20131017073925.GA34958@hell.ukr.net> <2AFE1CBD9B124E3AB9E05A4E483CCE03@multiplay.co.uk> <20131018080148.GA75226@hell.ukr.net> <256B2E5A0BA44DCBB45BB3F3E820E190@multiplay.co.uk> <20131018144524.GA30018@hell.ukr.net> <4459A6FAB7B8445C97CCB9EFF34FD4F0@multiplay.co.uk> <53144891.9050001@FreeBSD.org> <20140426012652.GA62784@over-yonder.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20140426012652.GA62784@over-yonder.net> X-Editor: vi X-OS: FreeBSD User-Agent: Mutt/1.5.23 (2014-03-12) X-Virus-Scanned: clamav-milter 0.98.3 at thyme.infocus-llc.com X-Virus-Status: Clean Cc: "Justin T. Gibbs" , Steven Hartland , freebsd-current@FreeBSD.org X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Jun 2014 13:48:00 -0000 On Fri, Apr 25, 2014 at 08:26:52PM -0500 I heard the voice of Matthew D. Fuller, and lo! it spake thus: > On Mon, Mar 03, 2014 at 11:17:05AM +0200 I heard the voice of > Andriy Gapon, and lo! it spake thus: > > > > I noticed that on some of our systems we were getting a clearly > > abnormal number of l2arc checksum errors accounted in l2_cksum_bad. > > [...] > > I propose the following patch which has been tested and seems to fix > > the problem without introducing any side effects: > > I've been running this for >2 weeks now without any cksum_bad's > showing up (long enough that without it, I'd have expected them), > and no other obvious side effects. Another 6 weeks on, still working fine and still seems to fix the issue. Any reason not to commit it? -- Matthew Fuller (MF4839) | fullermd@over-yonder.net Systems/Network Administrator | http://www.over-yonder.net/~fullermd/ On the Internet, nobody can hear you scream.