From owner-freebsd-current@FreeBSD.ORG Sat Apr 26 01:34:09 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 DD80A2CE; Sat, 26 Apr 2014 01:34:09 +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 AEA8B1190; Sat, 26 Apr 2014 01:34:09 +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 264CE37B4A0; Fri, 25 Apr 2014 20:26:53 -0500 (CDT) Received: by draco.over-yonder.net (Postfix, from userid 100) id 3gFvjm20QtzW9m; Fri, 25 Apr 2014 20:26:52 -0500 (CDT) Date: Fri, 25 Apr 2014 20:26:52 -0500 From: "Matthew D. Fuller" To: Andriy Gapon Subject: Re: ZFS secondarycache on SSD problem on r255173 Message-ID: <20140426012652.GA62784@over-yonder.net> References: <7059AA6DCC0D46B8B1D33FC883C31643@multiplay.co.uk> <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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <53144891.9050001@FreeBSD.org> X-Editor: vi X-OS: FreeBSD User-Agent: Mutt/1.5.23 (2014-03-12) X-Virus-Scanned: clamav-milter 0.98.1 at thyme.infocus-llc.com X-Virus-Status: Clean Cc: "Justin T. Gibbs" , freebsd-current@FreeBSD.org, Steven Hartland X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.17 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: Sat, 26 Apr 2014 01:34:09 -0000 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. FreeBSD 11.0-CURRENT #0 r264306M So if there are votes, I vote for making it work without that 'M' :) -- Matthew Fuller (MF4839) | fullermd@over-yonder.net Systems/Network Administrator | http://www.over-yonder.net/~fullermd/ On the Internet, nobody can hear you scream.