From owner-freebsd-current@FreeBSD.ORG Thu Aug 4 06:08:35 2005 Return-Path: X-Original-To: current@FreeBSD.ORG Delivered-To: freebsd-current@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id E4F4D16A41F for ; Thu, 4 Aug 2005 06:08:35 +0000 (GMT) (envelope-from ache@nagual.pp.ru) Received: from nagual.pp.ru (nagual.pp.ru [194.87.13.69]) by mx1.FreeBSD.org (Postfix) with ESMTP id 42B5E43D46 for ; Thu, 4 Aug 2005 06:08:35 +0000 (GMT) (envelope-from ache@nagual.pp.ru) Received: from nagual.pp.ru (ache@localhost [127.0.0.1]) by nagual.pp.ru (8.13.4/8.13.4) with ESMTP id j7468UZb021496; Thu, 4 Aug 2005 10:08:30 +0400 (MSD) (envelope-from ache@nagual.pp.ru) Received: (from ache@localhost) by nagual.pp.ru (8.13.4/8.13.4/Submit) id j7468Ur3021495; Thu, 4 Aug 2005 10:08:30 +0400 (MSD) (envelope-from ache) Date: Thu, 4 Aug 2005 10:08:30 +0400 From: Andrey Chernov To: Maxim.Sobolev@portaone.com, Dan Nelson , "current@freebsd.org" Message-ID: <20050804060830.GB21228@nagual.pp.ru> Mail-Followup-To: Andrey Chernov , Maxim.Sobolev@portaone.com, Dan Nelson , "current@freebsd.org" References: <42F0CCD5.9090200@portaone.com> <20050803150117.GD93405@dan.emsphone.com> <42F0E9B2.9080208@portaone.com> <20050804060251.GA21228@nagual.pp.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20050804060251.GA21228@nagual.pp.ru> User-Agent: Mutt/1.5.9i Cc: Subject: Re: Sub-optimal libc's read-ahead buffering behaviour X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 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: Thu, 04 Aug 2005 06:08:36 -0000 On Thu, Aug 04, 2005 at 10:02:51AM +0400, Andrey Chernov wrote: > No surprize. Single read can be consider as sort of "atomic" operation. > But between read & seek character device itself can move its pointer in > anyplace. No only move the pinter, but change contents too. Consider reading /dev/mem -- http://ache.pp.ru/