From owner-freebsd-fs@FreeBSD.ORG  Sun Sep 12 17:06:09 2010
Return-Path: <owner-freebsd-fs@FreeBSD.ORG>
Delivered-To: freebsd-fs@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 72147106566C;
	Sun, 12 Sep 2010 17:06:08 +0000 (UTC) (envelope-from avg@freebsd.org)
Received: from citadel.icyb.net.ua (citadel.icyb.net.ua [212.40.38.140])
	by mx1.freebsd.org (Postfix) with ESMTP id 446D18FC20;
	Sun, 12 Sep 2010 17:06:07 +0000 (UTC)
Received: from porto.topspin.kiev.ua (porto-e.starpoint.kiev.ua
	[212.40.38.100])
	by citadel.icyb.net.ua (8.8.8p3/ICyb-2.3exp) with ESMTP id UAA29383;
	Sun, 12 Sep 2010 20:06:04 +0300 (EEST)
	(envelope-from avg@freebsd.org)
Received: from localhost.topspin.kiev.ua ([127.0.0.1])
	by porto.topspin.kiev.ua with esmtp (Exim 4.34 (FreeBSD))
	id 1Ouq0B-000G4F-OY; Sun, 12 Sep 2010 20:06:03 +0300
Message-ID: <4C8D087B.5040404@freebsd.org>
Date: Sun, 12 Sep 2010 20:06:03 +0300
From: Andriy Gapon <avg@freebsd.org>
User-Agent: Mozilla/5.0 (X11; U; FreeBSD amd64; en-US;
	rv:1.9.2.9) Gecko/20100912 Lightning/1.0b2 Thunderbird/3.1.3
MIME-Version: 1.0
To: Steven Hartland <killing@multiplay.co.uk>
References: <5DB6E7C798E44D33A05673F4B773405E@multiplay.co.uk><AANLkTikNhsj5myhQCoPaNytUbpHtox1vg9AZm1N-OcMO@mail.gmail.com><4C85E91E.1010602@icyb.net.ua>
	<4C873914.40404@freebsd.org><20100908084855.GF2465@deviant.kiev.zoral.com.ua>
	<4C874F00.3050605@freebsd.org>
	<A6D7E134B24F42E395C30A375A6B50AF@multiplay.co.uk>
In-Reply-To: <A6D7E134B24F42E395C30A375A6B50AF@multiplay.co.uk>
X-Enigmail-Version: 1.1.2
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Cc: freebsd-fs@freebsd.org, Pawel Jakub Dawidek <pjd@freebsd.org>
Subject: Re: zfs very poor performance compared to ufs due to lack of cache?
X-BeenThere: freebsd-fs@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Filesystems <freebsd-fs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-fs>,
	<mailto:freebsd-fs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-fs>
List-Post: <mailto:freebsd-fs@freebsd.org>
List-Help: <mailto:freebsd-fs-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-fs>,
	<mailto:freebsd-fs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 12 Sep 2010 17:06:09 -0000

on 12/09/2010 19:51 Steven Hartland said the following:
> ----- Original Message ----- From: "Andriy Gapon" <avg@freebsd.org>
> 
>>>> --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c
>>>> +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c
>>>> @@ -500,6 +500,7 @@ again:
>>>>  sched_unpin();
>>>>  }
>>>>  VM_OBJECT_LOCK(obj);
>>>> + vm_page_set_validclean(m, off, bytes);
>>> Only if error == 0, perhaps ?
> 
> Ok tried this and still no joy, the value of the cache always falls to that of
> the min
> value and all memory used by sendfile still seems to get lost into inactive
> memory :(

Well, I do not see enough technical details in this report to see what's going
on.  As we know, there is also another issue (not sendfile specific) leading to
ARC shrinking.

-- 
Andriy Gapon