From owner-freebsd-hackers@FreeBSD.ORG  Wed Feb  6 16:34:30 2008
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 42BB916A419;
	Wed,  6 Feb 2008 16:34:30 +0000 (UTC) (envelope-from avg@icyb.net.ua)
Received: from falcon.cybervisiontech.com (falcon.cybervisiontech.com
	[217.20.163.9])
	by mx1.freebsd.org (Postfix) with ESMTP id CE1AE13C4E1;
	Wed,  6 Feb 2008 16:34:29 +0000 (UTC) (envelope-from avg@icyb.net.ua)
Received: from localhost (localhost [127.0.0.1])
	by falcon.cybervisiontech.com (Postfix) with ESMTP id F2A4043F8F2;
	Wed,  6 Feb 2008 18:34:28 +0200 (EET)
X-Virus-Scanned: Debian amavisd-new at falcon.cybervisiontech.com
Received: from falcon.cybervisiontech.com ([127.0.0.1])
	by localhost (falcon.cybervisiontech.com [127.0.0.1]) (amavisd-new,
	port 10024)
	with ESMTP id pVY5er24lJp3; Wed,  6 Feb 2008 18:34:28 +0200 (EET)
Received: from [10.2.1.87] (gateway.cybervisiontech.com.ua [88.81.251.18])
	(using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
	(No client certificate requested)
	by falcon.cybervisiontech.com (Postfix) with ESMTP id CC0CE43CA85;
	Wed,  6 Feb 2008 18:34:26 +0200 (EET)
Message-ID: <47A9E191.8000607@icyb.net.ua>
Date: Wed, 06 Feb 2008 18:34:25 +0200
From: Andriy Gapon <avg@icyb.net.ua>
User-Agent: Thunderbird 2.0.0.9 (X11/20080123)
MIME-Version: 1.0
To: pav@FreeBSD.org
References: <200612221824.kBMIOhfM049471@freefall.freebsd.org>	
	<47A2EDB0.8000801@icyb.net.ua> <47A2F404.7010208@icyb.net.ua>	
	<47A735A4.3060506@icyb.net.ua> <47A75B47.2040604@elischer.org>	
	<1202155663.62432.0.camel@ikaros.oook.cz>
	<47A8754C.5010607@icyb.net.ua>
	<1202235368.68281.12.camel@ikaros.oook.cz>
In-Reply-To: <1202235368.68281.12.camel@ikaros.oook.cz>
Content-Type: text/plain; charset=ISO-8859-2
Content-Transfer-Encoding: 8bit
Cc: Bruce Evans <bde@zeta.org.au>, freebsd-hackers@FreeBSD.org,
	scottl@FreeBSD.org, freebsd-fs@FreeBSD.org,
	Julian Elischer <julian@elischer.org>, Remko Lodder <remko@FreeBSD.org>
Subject: Re: fs/udf: vm pages "overlap" while reading  large dir [patch]
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 06 Feb 2008 16:34:30 -0000

on 05/02/2008 20:16 Pav Lucistnik said the following:
> Andriy Gapon píše v út 05. 02. 2008 v 16:40 +0200:
> 
>>> Yay, and can you fix the sequential read performance while you're at it?
>>> Kthx!
> 
>> this was almost trivial :-)
>> See the attached patch, first hunk is just for consistency.
>> The code was borrowed from cd9660, only field/variable names are adjusted.
> 
> Omg looks good. Can't wait for it to bubble throught to 6-STABLE :)
> 
> Thanks million for working on this.
> 

Actually the patch is not entirely correct. max_size returned from
udf_bmap_internal should be used to calculate number of continuous
sectors for read-ahead (as opposed to file size in the patch).

-- 
Andriy Gapon