From owner-freebsd-fs@freebsd.org Tue Feb 2 16:54:49 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 4CE00A9945C for ; Tue, 2 Feb 2016 16:54:49 +0000 (UTC) (envelope-from vivek@khera.org) Received: from mail-wm0-x234.google.com (mail-wm0-x234.google.com [IPv6:2a00:1450:400c:c09::234]) (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 E01A31248 for ; Tue, 2 Feb 2016 16:54:48 +0000 (UTC) (envelope-from vivek@khera.org) Received: by mail-wm0-x234.google.com with SMTP id r129so127204142wmr.0 for ; Tue, 02 Feb 2016 08:54:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=khera.org; s=google11; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=Kxws9l3Ls0A5GZZElCZVoal4wxRT+0e9er0DV/3c01s=; b=fsahZJTzD10qsbWfuuI2ynYYpHPnrnfbYRwVsBEjw4fPTW3iwOMyTCl+EpeHm9p3Tn Rmxuug5VI94JtTl0wigsTBInj2pZRkyZCDtrfBnAkIV6v1wMrEqSGPinARyfZQM07TiW Y9FGhpG8ihn3lnF6XhrB8X6HN77J9yofayKtY= 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:content-type; bh=Kxws9l3Ls0A5GZZElCZVoal4wxRT+0e9er0DV/3c01s=; b=ml8WCvm3r/apl6lo6ofkGayKkY0+5/GSXIP5bho+xoJxGfnLlvQAB58QUq053NzXIg TVMDi4gh2I5F4WpHsOFRC5+l/b6XuBdArxYfhQvJBUStQ4INmyoJEGs0Dz1K67qt2sRI +jwpIG8ax671JLKckvgo+8CTjUruVCAM745lz3GixTFLlE53UhH9LusndKrLIXxKk2EE 0F/S2GXohyXhzedZ15mpJ0cSfQ9KVkFZiC1g9wWYF1cHq0BwQw49QUQZSTq2/MLL8fb1 vMdY1l8AexfHWpHTHJMW4rBmYNqAytJ8e1TiXeWaH5/qWsQHDsmhkqty038X/cHVC2tB Krrg== X-Gm-Message-State: AG10YOQVpmPB/ikMPfRuZ6XGwQsABOa06sF6Mfbu4311uet7M6Z4uKIFBSVbzQYc4PtaTNGgJtp5s+JN1Kmoow== MIME-Version: 1.0 X-Received: by 10.194.176.170 with SMTP id cj10mr29918885wjc.165.1454432086958; Tue, 02 Feb 2016 08:54:46 -0800 (PST) Received: by 10.28.165.138 with HTTP; Tue, 2 Feb 2016 08:54:46 -0800 (PST) In-Reply-To: <5EAD4A4A-211F-451E-A3B9-752DAC6D94B4@bway.net> References: <5EAD4A4A-211F-451E-A3B9-752DAC6D94B4@bway.net> Date: Tue, 2 Feb 2016 11:54:46 -0500 Message-ID: Subject: Re: NFS unstable with high load on server From: Vick Khera To: Charles Sprickman Cc: Ben Woods , freebsd-fs@freebsd.org, "freebsd-questions@freebsd.org" Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.20 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 02 Feb 2016 16:54:49 -0000 On Tue, Feb 2, 2016 at 1:26 AM, Charles Sprickman wrote: > Me three. I=E2=80=99m actually updating a small group of servers now and= started > blowing up my installworlds by trying to do some poudriere builds at the > same > time. Very repeatable. Of note, I=E2=80=99m on 9.3, and saw this on 8.4= as > well. If I > track down the client-side failures, it=E2=80=99s always =E2=80=9Cpermiss= ion denied=E2=80=9D. > Thanks for confirming this behavior. It is distressing to me that it happens at all. It must be some bad race condition somewhere, and unfortunately having a non-deterministic NFS server makes is unsuitable for production use. This is a problem for me since everything I have is FreeBSD... I will file a bug ticket, since I'm pretty sure at this point it is not something special with my environment.