From owner-freebsd-stable@FreeBSD.ORG Mon Aug 5 17:10:03 2013 Return-Path: Delivered-To: freebsd-stable@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 B03914FB for ; Mon, 5 Aug 2013 17:10:03 +0000 (UTC) (envelope-from nonesuch@longcount.org) Received: from mail-qa0-f44.google.com (mail-qa0-f44.google.com [209.85.216.44]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 6C4F228B9 for ; Mon, 5 Aug 2013 17:10:02 +0000 (UTC) Received: by mail-qa0-f44.google.com with SMTP id hu16so1093641qab.3 for ; Mon, 05 Aug 2013 10:09:56 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=references:mime-version:in-reply-to:content-type :content-transfer-encoding:message-id:cc:x-mailer:from:subject:date :to:x-gm-message-state; bh=wl3ZMXEms6EloxvganyflLxI6K7T2//QAOy8ItVzUgc=; b=DDmg29ZZ9diVwGnrqC+Bkk2nygeGd4xy7RHDxvkBKLn6hP0DzFdyN5TRgtyznVIkrA G/Xe31MCV5r9zl+VA3ajcuS7UuLbxsEaVOXtBWO6NBTDae7yEf52PRmHSMpV4vAujP7N GKQJHD1ax1NQQEGJnJhFRtDtwQO2je1ARKrvzlZdOKGh/bCIdAQUD6TiaksydM2LeQkd RjUWhjT+dfpFDC1GCBZ5Hb4LN8Su8URlygcccv1Tb6Sri2c1Ii5/emZ50u65bUo+sdWW u+49k59UQkYmQA5fiLfvtz3wWekiFWzBnxPma0l7Gl3Fb1uXeAQmkGCR8Zbn+sUmDzW+ Vw3Q== X-Received: by 10.224.24.134 with SMTP id v6mr29330726qab.58.1375718820787; Mon, 05 Aug 2013 09:07:00 -0700 (PDT) Received: from [192.168.11.213] (ool-4a58bf32.dyn.optonline.net. [74.88.191.50]) by mx.google.com with ESMTPSA id nh4sm5136198qeb.6.2013.08.05.09.06.58 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 05 Aug 2013 09:06:59 -0700 (PDT) References: <1710471570.3603170.1375141032147.JavaMail.root@uoguelph.ca> Mime-Version: 1.0 (1.0) In-Reply-To: Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Message-Id: <4166503B-C2FA-4FF4-9E2A-54874CA9EBF2@longcount.org> X-Mailer: iPhone Mail (10B329) From: Mark Saad Subject: Re: NFS deadlock on 9.2-Beta1 Date: Mon, 5 Aug 2013 12:06:58 -0400 To: J David X-Gm-Message-State: ALoCoQldbDL4IoxgNdHt5jo655pKm4QwJ2Lq7W8bxd8HeUBkoMQVeaFOBRnSv+C2E/D0wiu+HJmC Cc: Rick Macklem , "freebsd-stable@freebsd.org" , Michael Tratz , Steven Hartland , Konstantin Belousov , re X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 05 Aug 2013 17:10:03 -0000 On Jul 29, 2013, at 10:48 PM, J David wrote: > If it is helpful, we have 25 nodes testing the 9.2-BETA1 build and > without especially trying to exercise this bug, we found > sendfile()-using processes deadlocked in WCHAN newnfs on 5 of the 25 > nodes. The ones with highest uptime (about 3 days) seem most > affected, so it does seem like a "sooner or later" type of thing. > Hopefully the fix is easy and it won't be an issue, but it definitely > does seem like a problem 9.2-RELEASE would be better off without. >=20 > Unfortunately we are not in a position to capture the requested > debugging information at this time; none of those nodes are running a > debug version of the kernel. If Michael is unable to get the > information as he hopes, we can try to do that, possibly over the > weekend. For the time being, we will convert half the machines to > rollback r250907 to try to confirm that resolves the issue. >=20 > Thanks all! If one has to encounter a problem like this, it is nice > to come to the list and find the research already so well underway! > ______________________________ All Is there any updates on this issue ? Has anyone tested it or see it happen= on the release candidate ?=20 --- Mark saad | mark.saad@longcount.org