From owner-freebsd-stable@FreeBSD.ORG  Mon Feb 13 05:27:10 2012
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id B6BA71065690
	for <freebsd-stable@freebsd.org>; Mon, 13 Feb 2012 05:27:10 +0000 (UTC)
	(envelope-from adrian.chadd@gmail.com)
Received: from mail-we0-f182.google.com (mail-we0-f182.google.com
	[74.125.82.182])
	by mx1.freebsd.org (Postfix) with ESMTP id 40A348FC12
	for <freebsd-stable@freebsd.org>; Mon, 13 Feb 2012 05:27:09 +0000 (UTC)
Received: by werm13 with SMTP id m13so5013313wer.13
	for <freebsd-stable@freebsd.org>; Sun, 12 Feb 2012 21:27:09 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma;
	h=mime-version:sender:in-reply-to:references:date
	:x-google-sender-auth:message-id:subject:from:to:cc:content-type;
	bh=S2/AErIZVP/+qVw7OGCxiUI1EwFjbr98+Y+gDXBXpE4=;
	b=Zk3J5kMaEw/2nW0J4cja/mFT+NsoVnd+hRlHSm1bIHgsNOcdVUqXdZmZL0Zy+JgGDS
	DaETSuXEVZT5Nd6PM31RITOyFAA/KH1YRulFguJfDle3II6FJxb6nguQwG/tbw+MtbUZ
	EFVHoogTgz0efPpD1fy1iJ7tvRvc5b0rEkF9s=
MIME-Version: 1.0
Received: by 10.180.107.34 with SMTP id gz2mr21863471wib.21.1329110829161;
	Sun, 12 Feb 2012 21:27:09 -0800 (PST)
Sender: adrian.chadd@gmail.com
Received: by 10.216.175.136 with HTTP; Sun, 12 Feb 2012 21:27:09 -0800 (PST)
In-Reply-To: <4F37F81E.7070100@os2.kiev.ua>
References: <4F215A99.8020003@os2.kiev.ua> <4F27C04F.7020400@omnilan.de>
	<4F27C7C7.3060807@os2.kiev.ua>
	<CAJ-VmomezUWrEgxxmUEOhWnmLDohMAWRpSXmTR=n2y_LuizKJg@mail.gmail.com>
	<4F37F81E.7070100@os2.kiev.ua>
Date: Sun, 12 Feb 2012 21:27:09 -0800
X-Google-Sender-Auth: O6WHhg3Bofu5qgtIY8gHPek9YwI
Message-ID: <CAJ-Vmok9Ph1sgFCy6kNT4XR14grTLvG9M3JvT9eVBRjgqD+Y9g@mail.gmail.com>
From: Adrian Chadd <adrian@freebsd.org>
To: Alex Samorukov <ml@os2.kiev.ua>
Content-Type: text/plain; charset=ISO-8859-1
Cc: Harald Schmalzbauer <h.schmalzbauer@omnilan.de>, freebsd-stable@freebsd.org
Subject: Re: disk devices speed is ugly
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, 
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 13 Feb 2012 05:27:10 -0000

On 12 February 2012 09:34, Alex Samorukov <ml@os2.kiev.ua> wrote:

> Yes. But it will nit fix non-cached access to the disk (raw) devices. And
> this is the main reason why ntfs-3g and exfat are much slower then working
> on Linux.

But _that_ can be fixed with the appropriate application of a sensible
caching layer.

So if there are alignment issues, let's fix those up first so
filesystems act sensibly with the block device layer. Then yes, adding
a caching layer that works. I didn't get very good performance with
g_cache when i last tried it.



Adrian