From owner-freebsd-fs@freebsd.org Mon Mar 28 16:09:41 2016 Return-Path: Delivered-To: freebsd-fs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 7033BAE070F; Mon, 28 Mar 2016 16:09:41 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: from mail-ig0-x235.google.com (mail-ig0-x235.google.com [IPv6:2607:f8b0:4001:c05::235]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 3A94810ED; Mon, 28 Mar 2016 16:09:41 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: by mail-ig0-x235.google.com with SMTP id a1so21426527igb.1; Mon, 28 Mar 2016 09:09:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc; bh=sShoQORPffs52DA4YndDGwHF1szc7GlwPxlMKmSvrKE=; b=R4shVnLZ3J4x+50PFcs2b2LP3uy4qsxaMCwnrIezPd9oN3xUt8r4hi6GgsFF8UyOZb lQh0yM9w0UMyE1c4tNlEIoy/fxNKDxXwp60iZPd9QTxgPXD3EgLr3MCkpjRWYEBw5Qsq v+C3+qUsnOJoJwZ5V6HbOsAk+2vOE6HL1OLAZ1RdXwojw/yzOD3Iwrd6gYh3Aht80QJS bRPKCXCtpW6KMdJnyfJcQGo6svS0eXu6xIqELH5TbFbjWeI3u035c9eQsMtRLDrF+wg/ 6nQo936rM0wbIuwNwY6seS/3iQllH+Nopzams+44QkFD9rOm4WYAeLoGXrTA7YbLAD20 X9+Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc; bh=sShoQORPffs52DA4YndDGwHF1szc7GlwPxlMKmSvrKE=; b=GtMziUvO3HfBMlsiHOc73DTTrXQU7PqSX0tkV49EvoivBdFUqkwP/0XARXeJoiAWMz 3zSElveFM4nsDALsxiJB2/m3WGBaSwfVCW9CEVmrp/9sh1eUYMatjh5WV3NglpmPOQtW /k4qHMbJqPffnGJfLzceE92Ss10FxjKP33sc7+E+/ME1ue6l4c7vR7RhWfHf54jZaqww zQQOvIrFM7idx9NF9N6gVf1q3PpSKPFYz227GqYR5qaP/neRSJLrcqc9qiAo2qDcjl95 hP3c2Y4XkDgL/ORzY0zAb+VzjPCzXOZhF5Ejh6VLzuiinEU61vG6zX/+hN6GKDnD37DJ WwGw== X-Gm-Message-State: AD7BkJI97hqhYy2ScbqqodmfGeurOWAHZFjY3rVhtSHMSxO9ibsqP7XkGa1Om3FaymWXY2oHEQduqBYYnCNH8w== MIME-Version: 1.0 X-Received: by 10.50.8.102 with SMTP id q6mr10818286iga.37.1459181380578; Mon, 28 Mar 2016 09:09:40 -0700 (PDT) Received: by 10.36.14.19 with HTTP; Mon, 28 Mar 2016 09:09:40 -0700 (PDT) In-Reply-To: References: Date: Mon, 28 Mar 2016 09:09:40 -0700 Message-ID: Subject: Re: Process stuck in "vnread" From: Adrian Chadd To: Maxim Sobolev Cc: "stable@freebsd.org" , FreeBSD Filesystems , Pawel Jakub Dawidek , Kirk McKusick , Konstantin Belousov Content-Type: text/plain; charset=UTF-8 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 28 Mar 2016 16:09:41 -0000 Hi, I think a bunch of the lock order checks with witness get disabled for ZFS ? Maybe compile up a witness kernel so you can get 'show alllocks' in ddb. That should help narrow down exactly what's going on. Thanks! -a