From owner-freebsd-fs@FreeBSD.ORG Wed Oct 17 14:41:52 2012 Return-Path: Delivered-To: freebsd-fs@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 8A085D8B; Wed, 17 Oct 2012 14:41:52 +0000 (UTC) (envelope-from prvs=16374f1e9b=killing@multiplay.co.uk) Received: from mail1.multiplay.co.uk (mail1.multiplay.co.uk [85.236.96.23]) by mx1.freebsd.org (Postfix) with ESMTP id E10DD8FC12; Wed, 17 Oct 2012 14:41:51 +0000 (UTC) Received: from r2d2 ([188.220.16.49]) by mail1.multiplay.co.uk (mail1.multiplay.co.uk [85.236.96.23]) (MDaemon PRO v10.0.4) with ESMTP id md50000728115.msg; Wed, 17 Oct 2012 15:41:48 +0100 X-Spam-Processed: mail1.multiplay.co.uk, Wed, 17 Oct 2012 15:41:48 +0100 (not processed: message from valid local sender) X-MDRemoteIP: 188.220.16.49 X-Return-Path: prvs=16374f1e9b=killing@multiplay.co.uk X-Envelope-From: killing@multiplay.co.uk Message-ID: <9826CE7F20544176825D7C71CD4A36B4@multiplay.co.uk> From: "Steven Hartland" To: "Andriy Gapon" , "Nikolay Denev" References: <1350317019.71982.50.camel@btw.pki2.com> <201210160844.41042.jhb@freebsd.org> <1350400597.72003.32.camel@btw.pki2.com> <201210161215.33369.jhb@freebsd.org> <507D8B69.3090903@FreeBSD.org> <0B0CA833-79FA-4C8E-86AC-828E7947FF67@gmail.com> <507EC242.1070809@FreeBSD.org> Subject: Re: I have a DDB session open to a crashed ZFS server Date: Wed, 17 Oct 2012 15:41:39 +0100 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; 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-fs@FreeBSD.org, dg17@penx.com, Dennis Glatting X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 17 Oct 2012 14:41:52 -0000 ----- Original Message ----- From: "Andriy Gapon" >> And there were no deadlocks since it's applied. >> If you're hitting the same issue as I was, this should help. > > I am going to commit that change soon-ish, if nobody expressly objects to it. > > BTW, Nikolay, is your system (that used to deadlock) amd64? > Could you please capture 'sysctl vm | fgrep kmem' output when it is under load? We have a machine here which is locking up under high NFS / ZFS load but unfortunately when it locks nothing is responsive. I've patched out 8.3-RELEASE install with this and intend to give it a test but as it only happens every week or so won't be able to give you an answer for a few weeks I'm afraid. 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.