From owner-freebsd-current@FreeBSD.ORG Mon Mar 4 03:53:20 2013 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115]) by hub.freebsd.org (Postfix) with ESMTP id 8CFEDDE2 for ; Mon, 4 Mar 2013 03:53:20 +0000 (UTC) (envelope-from deeptech71@gmail.com) Received: from mail-ee0-f45.google.com (mail-ee0-f45.google.com [74.125.83.45]) by mx1.freebsd.org (Postfix) with ESMTP id 2D8CC9D1 for ; Mon, 4 Mar 2013 03:53:19 +0000 (UTC) Received: by mail-ee0-f45.google.com with SMTP id b57so3494743eek.18 for ; Sun, 03 Mar 2013 19:53:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=x-received:message-id:date:from:user-agent:mime-version:to:subject :references:in-reply-to:content-type:content-transfer-encoding; bh=/f/H8o7gqdcydv3zIf6IbOlV6YdGFyWtPKv5jaacMjM=; b=PE7DErzr2bpEVd9vJObOXsysrHZeE/4sFBXn2/sm8vxEBTjfMRYFJHYprV18DJnbTy H+tAdhOMtjpYXXH+w0RJtKiCAcDcTbEe98VkPBUzu+Mbu842sm9VI5hrVK8v8dyHwvaK LZkHZEMzyYr+s7wjV01FxP/N5McCtJpbKp9pRhfkyUCnTu1sFyIRCqlaBEUujfxe3CTJ C4u/uG/2vb36471jULnTBbU1AV1CbHwTo/wzhcj033+GIFXVzxH367Yz/CcZRN4Elhm5 KHxLhTxbDo1ppjlNe4w11+I4pAbMxvm8jQpQro7D1Uh34uzYsHNuwbJM1f385bfcEAsJ FLlw== X-Received: by 10.14.1.130 with SMTP id 2mr54264778eed.15.1362369198945; Sun, 03 Mar 2013 19:53:18 -0800 (PST) Received: from [192.168.1.80] (dsl4E5CC75B.pool.t-online.hu. [78.92.199.91]) by mx.google.com with ESMTPS id m46sm29807113eeo.16.2013.03.03.19.53.17 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sun, 03 Mar 2013 19:53:17 -0800 (PST) Message-ID: <51341AA6.7080601@gmail.com> Date: Mon, 04 Mar 2013 04:53:10 +0100 From: deeptech71 User-Agent: Mozilla/5.0 (X11; FreeBSD i386; rv:18.0) Gecko/20100101 SeaMonkey/2.15 MIME-Version: 1.0 To: freebsd-current@freebsd.org Subject: Re: access to hard drives is "blocked" by writes to a flash drive References: <201303040301.r2431Rjm008175@gw.catspoiler.org> In-Reply-To: <201303040301.r2431Rjm008175@gw.catspoiler.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 04 Mar 2013 03:53:20 -0000 On 03/04/2013 04:01, Don Lewis wrote: > The Lemming-syncer problem should have mostly been fixed by 231160 in > head (231952 in stable/9 and 231967 in stable/8) a little over a year > ago. The exceptions are atime updates, mmaped files with dirty pages, > and quotas. Under certain workloads I still notice periodic bursts of > seek noise. After thinking about it for a bit, I suspect that it could > be atime updates, but I haven't tried to confirm that. atime is disabled on all mount points. Subversion doesn't use mmapped files, does it? No quotas are in use. atime is retarded anyway. There ought to be a kernel configuration (no)option SUPPORT_ATIME.