From owner-freebsd-current@FreeBSD.ORG Wed Oct 16 23:42:57 2013 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 ESMTP id 2B83B8B7; Wed, 16 Oct 2013 23:42:57 +0000 (UTC) (envelope-from prvs=100105a393=killing@multiplay.co.uk) Received: from mail1.multiplay.co.uk (mail1.multiplay.co.uk [85.236.96.23]) (using TLSv1 with cipher RC4-MD5 (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 959AE22F3; Wed, 16 Oct 2013 23:42:56 +0000 (UTC) Received: from r2d2 ([82.69.141.170]) by mail1.multiplay.co.uk (mail1.multiplay.co.uk [85.236.96.23]) (MDaemon PRO v10.0.4) with ESMTP id md50006424213.msg; Thu, 17 Oct 2013 00:42:54 +0100 X-Spam-Processed: mail1.multiplay.co.uk, Thu, 17 Oct 2013 00:42:54 +0100 (not processed: message from valid local sender) X-MDDKIM-Result: neutral (mail1.multiplay.co.uk) X-MDRemoteIP: 82.69.141.170 X-Return-Path: prvs=100105a393=killing@multiplay.co.uk X-Envelope-From: killing@multiplay.co.uk Message-ID: <7059AA6DCC0D46B8B1D33FC883C31643@multiplay.co.uk> From: "Steven Hartland" To: "Justin T. Gibbs" , "Vitalij Satanivskij" References: <1379069539.824504225.3b9xwugp@fmst-6.ukr.net> <74C1D072-77BB-4D6C-B78F-C8D2731FA0CF@sarenet.es> <1379333192.127359970.ma5jnbc5@fmst-6.ukr.net> <1379334340.567465877.0b1lli6r@fmst-6.ukr.net> <8365CE736DC749DF95D0030A725211F6@multiplay.co.uk> <02549AD9-C456-4E17-927C-B4BCC97F8CC8@freebsd.org> <4AA28730F331444AB13108ABF0CD68B7@multiplay.co.uk> <1379496242.750778745.m0ksff1m@fmst-6.ukr.net> <20131016080100.GA27758@hell.ukr.net> <3A44A8F6-8B62-4A23-819D-B91A3E6E5EF9@freebsd.org> Subject: Re: ZFS secondarycache on SSD problem on r255173 Date: Thu, 17 Oct 2013 00:43:09 +0100 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="Windows-1252"; reply-type=original Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 Cc: freebsd-current@freebsd.org, Borja Marcos , Dmitriy Makarov X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.14 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: Wed, 16 Oct 2013 23:42:57 -0000 Ohh stupid question what hardware are you running this on, specifically what SSD's and what controller and if relavent what controller Firmware version? I wonder if you might have bad HW / FW, such as older LSI mps Firmware, which is know to causing corruption with some delete methods. Without the ashift fixes, you'll be sending short requests to the disk which will then ignore them, so I can see a potential corrilation there. You could rule this out by disabling ZFS TRIM with vfs.zfs.trim.enabled=0 in /boot/loader.conf Regards Steve ================================================ This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it. In the event of misdirection, illegible or incomplete transmission please telephone +44 845 868 1337 or return the E.mail to postmaster@multiplay.co.uk.