From owner-freebsd-fs@FreeBSD.ORG Mon Apr 10 15:37:46 2006 Return-Path: X-Original-To: freebsd-fs@FreeBSD.org Delivered-To: freebsd-fs@FreeBSD.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id DD02016A409 for ; Mon, 10 Apr 2006 15:37:46 +0000 (UTC) (envelope-from Nicolas.Kowalski@imag.fr) Received: from imag.imag.fr (imag.imag.fr [129.88.30.1]) by mx1.FreeBSD.org (Postfix) with ESMTP id 51CDC43D5F for ; Mon, 10 Apr 2006 15:36:57 +0000 (GMT) (envelope-from Nicolas.Kowalski@imag.fr) Received: from mail-veri.imag.fr (mail-veri.imag.fr [129.88.43.52]) by imag.imag.fr (8.13.6/8.13.6) with ESMTP id k3AFasoF020464 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=NO) for ; Mon, 10 Apr 2006 17:36:54 +0200 (CEST) Received: from corbeau.imag.fr ([129.88.43.162]) by mail-veri.imag.fr with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA:32) (Exim 4.50) id 1FSyRi-0006Xl-At for freebsd-fs@FreeBSD.org; Mon, 10 Apr 2006 17:36:54 +0200 Received: from kowalski by corbeau.imag.fr with local (Exim 4.50) id 1FSyRi-00012z-3A for freebsd-fs@FreeBSD.org; Mon, 10 Apr 2006 17:36:54 +0200 To: freebsd-fs@FreeBSD.org References: <20060329152608.GB1375@deviant.kiev.zoral.com.ua> <20060410144904.GC1408@deviant.kiev.zoral.com.ua> From: Nicolas KOWALSKI Date: Mon, 10 Apr 2006 17:36:54 +0200 In-Reply-To: <20060410144904.GC1408@deviant.kiev.zoral.com.ua> Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: Nicolas Kowalski X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-1.6 (imag.imag.fr [129.88.30.1]); Mon, 10 Apr 2006 17:36:54 +0200 (CEST) X-IMAG-MailScanner-Information: Please contact IMAG DMI for more information X-IMAG-MailScanner: Found to be clean X-MailScanner-From: kowalski@imag.fr Cc: Subject: Re: [patch] giant-less quotas for UFS X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 10 Apr 2006 15:37:47 -0000 Kostik Belousov writes: > On Mon, Apr 10, 2006 at 04:16:27PM +0200, Nicolas KOWALSKI wrote: >> Hello, >> >> Kostik Belousov writes: >> >> > I already mailed about my development of the patch that >> > allows for UFS with quotas to operate without Giant. Sorry if the >> > repeat would be annoying. >> >> Does this patch improve the performance of a file server, using >> multiple disks, controlled by quotas, exported by NFS/Samba ? >> >> If so, I would be really interested: our file server (4.11, but >> perhaps 6.x soon), has some major slowdowns when one or multiple >> user/s exceed her/his quota ; this impact every user, even those >> working on another disk. > I don't think that patch shall have effect on this situation (quota > exceeded). :-( , but Thanks for your response. > Probably, you have some other issues, esp. for 4.x, where > only one process can progress in kernel mode anyway. > Just guessing: do you have slow (serial) console ? No serial console here, the server is connected to a standard vga/ps2 KVM switch. > Yes, I expect patch to improve overall system performance for 6.x/7 when > quotas are compiled in the kernel compared with the same kernel > config without patch. This was the reason for developing the change. > I do not have a numerical measurement of improvement, though. > I will be very glad for testing/stress testing/performance measurement > for the patch. > > BUT, PLEASE BEWARE. Don't apply the patch for non-test machines. Ok, I will install a test machine and try to stress it. Best regards, -- Nicolas