From owner-freebsd-fs@FreeBSD.ORG Sun Jul 31 20:01:35 2011 Return-Path: Delivered-To: freebsd-fs@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 8327B106566B; Sun, 31 Jul 2011 20:01:35 +0000 (UTC) (envelope-from prvs=1193afe4ca=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 9ADD78FC0A; Sun, 31 Jul 2011 20:01:34 +0000 (UTC) X-MDAV-Processed: mail1.multiplay.co.uk, Sun, 31 Jul 2011 20:50:29 +0100 X-Spam-Processed: mail1.multiplay.co.uk, Sun, 31 Jul 2011 20:50:29 +0100 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on mail1.multiplay.co.uk X-Spam-Level: X-Spam-Status: No, score=-5.0 required=6.0 tests=USER_IN_WHITELIST shortcircuit=ham autolearn=disabled version=3.2.5 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 md50014407264.msg; Sun, 31 Jul 2011 20:50:27 +0100 X-MDRemoteIP: 188.220.16.49 X-Return-Path: prvs=1193afe4ca=killing@multiplay.co.uk X-Envelope-From: killing@multiplay.co.uk Message-ID: <04C305AE5F184C6AAC2A67CE23184013@multiplay.co.uk> From: "Steven Hartland" To: "David P Discher" References: <0D449EC916264947AB31AA17F870EA7A@multiplay.co.uk> <4E3013DF.10803@FreeBSD.org> <3D6CEB50BEDD4ACE96FD35C4D085618A@multiplay.co.uk> <4E301C55.7090105@FreeBSD.org> <5C84E7C8452E489C8CA738294F5EBB78@multiplay.co.uk> <4E301F10.6060708@FreeBSD.org> <63705B5AEEAD4BB88ADB9EF770AB6C76@multiplay.co.uk> <4E302204.2030009@FreeBSD.org> <6703F0BB-D4FC-4417-B519-CAFC62E5BC39@bitgravity.com> Date: Sun, 31 Jul 2011 20:50:58 +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 V6.00.2900.6109 Cc: freebsd-fs@FreeBSD.org, Andriy Gapon Subject: Re: zfs process hang on pool access X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 31 Jul 2011 20:01:35 -0000 Is there a PR related to this so we can track progress. Having to reboot machines every 100+ days to ensure they don't break is a bit of a PITA when you've got hundreds of machines :( ----- Original Message ----- From: "David P Discher" To: "Steven Hartland" Cc: ; "Andriy Gapon" Sent: Wednesday, July 27, 2011 9:41 PM Subject: Re: zfs process hang on pool access The way I found this was breaking into the debugger, do some back traces, continue, break in again, do some more back traces on the hung processes ... see what is going on, then walk through the code. Then what I had specific loops and code locations, asking the higher powers of the freebsd kernel world. ... ================================================ 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.