From owner-freebsd-current@FreeBSD.ORG Sat Mar 2 17:30:09 2013 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 3E28BA71 for ; Sat, 2 Mar 2013 17:30:09 +0000 (UTC) (envelope-from deeptech71@gmail.com) Received: from mail-ee0-f54.google.com (mail-ee0-f54.google.com [74.125.83.54]) by mx1.freebsd.org (Postfix) with ESMTP id BFCD3913 for ; Sat, 2 Mar 2013 17:30:08 +0000 (UTC) Received: by mail-ee0-f54.google.com with SMTP id c41so3124562eek.13 for ; Sat, 02 Mar 2013 09:30:01 -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 :content-type:content-transfer-encoding; bh=bpeBo918wXvu6zdL5xm29eeNqpgflGN5qzZkExmtrRg=; b=R7mlNy9Kz/ER8Cr85zSlGOpByl/HxxGZEgFCLAbRStVVRsk/6BifyBRTOG7zCESweW yKlEczg6YdMUfyO1+o598l7chPRyQqJBH8Z1BwaLPHqRIEys1cBfa8AraJrswqoWNGKl SYjfvhvEbzGoyltSNRN9VJks65UVFDQJ0VYVCYHqU2w6nxJjrqF3D2U4Xfn3LJJbAvsU A45yghJVLihIhxdXDkhbTp8AiOGmsct6S0IBsad618fekNWdDiFxLWrac/dPYUHJ31Ex O+yodE18fWYhFK4F1LkYxp7A6pSj7rqUVn445h0tR8elLdCnZ7ESArWyq/Rmn4qCSYys X8HA== X-Received: by 10.14.207.200 with SMTP id n48mr40488741eeo.4.1362245401661; Sat, 02 Mar 2013 09:30:01 -0800 (PST) Received: from [192.168.1.80] (dsl91EC79C6.pool.t-online.hu. [145.236.121.198]) by mx.google.com with ESMTPS id k7sm23066756een.8.2013.03.02.09.29.59 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sat, 02 Mar 2013 09:30:00 -0800 (PST) Message-ID: <51323712.5000406@gmail.com> Date: Sat, 02 Mar 2013 18:29:54 +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: access to hard drives is "blocked" by writes to a flash drive Content-Type: text/plain; charset=UTF-8; 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: Sat, 02 Mar 2013 17:30:09 -0000 When one of my flash drives is being heavily written to; typically by ``svn update'' on /usr/src, located on the flash drive; the following can be said about filesystem behavior: - ``svn update'' seems to be able to quickly update a bunch of files, but is then unable to continue for a period of time. This behavior is cyclical, and cycles several times, depending on the amount of updating work to be done for a particular run of ``svn update''. - Access to any filesystem, whether on the said flash drive or not, seems to be hindered a lot, typically during the said "unable to continue" time. Reading of a file on a hard drive was once delayed for more than 10 seconds. Seemingly as a consequence, the starting of top(1) is also typically delayed. SU is enabled on all UFS filesystems, including the ones on the hard drives and the flash drive.