From owner-freebsd-stable@FreeBSD.ORG Wed Jan 13 09:12:32 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id C18AA10656A5 for ; Wed, 13 Jan 2010 09:12:32 +0000 (UTC) (envelope-from asmrookie@gmail.com) Received: from mail-fx0-f227.google.com (mail-fx0-f227.google.com [209.85.220.227]) by mx1.freebsd.org (Postfix) with ESMTP id 5BB3C8FC14 for ; Wed, 13 Jan 2010 09:12:32 +0000 (UTC) Received: by fxm27 with SMTP id 27so325624fxm.3 for ; Wed, 13 Jan 2010 01:12:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:sender:received:date :x-google-sender-auth:message-id:subject:from:to:content-type; bh=+L4lpNxCnFTSZ333CNPoniikqoxc3T1FAaUhMd0ZkE8=; b=FGlD40i8RhhcCE3F5sFJYw7LOM2h5Y7FjwUJtNq6BBCtBHaKuTNZnpDZcS8/EZe87N bje8BQvVVrP/k6nSWhwdaqfRDMWuK/3QYitt518q5wtMMGkSlhFftakt8NWIIEqY3SrE kdgNR0STmJTdQyGitpWkTEcoaq0WAZZ2Usles= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:date:x-google-sender-auth:message-id:subject :from:to:content-type; b=B/iZW1rOuExJlR2C2hnC8KZIV8LLRD6P9t0C2rQ+ByzbUU0wdPLDcuGnqOYSGwrYpT YhZJ4NVbvV1WIKhbxvViunDDRmwZQ7GsWW8lJqb45S6K6vQBEGPQ9V0DpM9tOrOTPiH/ TicomtWeHzlGTZBRLmUT7nicFx8ypSPY/0GDw= MIME-Version: 1.0 Sender: asmrookie@gmail.com Received: by 10.223.97.155 with SMTP id l27mr1395863fan.91.1263373944001; Wed, 13 Jan 2010 01:12:24 -0800 (PST) Date: Wed, 13 Jan 2010 10:12:23 +0100 X-Google-Sender-Auth: 99c2183cdabe104c Message-ID: <3bbf2fe11001130112l26f7370dr2e282455a934a0b@mail.gmail.com> From: Attilio Rao To: freebsd-stable Content-Type: text/plain; charset=UTF-8 Subject: [PATCH] Lockmgr deadlock on STABLE_8 X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 13 Jan 2010 09:12:32 -0000 As people following HEAD may have seen, around 1 month ago a fix to lockmgr(9) has been committed that should prevent a deadlock for that primitive (the fixup is composed by r200447,201703,201709-201710). As long as the approach choosen in HEAD is optimal, unluckilly it does introduce an ABI breakage. In order to allow a MFC, a similar approach, being a bit sub-optimal, but not breaking ABI, has been prepared for STABLE_8: http://www.freebsd.org/~attilio/lockmgr_fix8.diff I'm seeking for testers here. Any report would be very much appreciated. Thanks, Attilio -- Peace can only be achieved by understanding - A. Einstein