From owner-freebsd-fs@FreeBSD.ORG Tue Dec 25 16:49:18 2012 Return-Path: Delivered-To: fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id D0AD3D55 for ; Tue, 25 Dec 2012 16:49:18 +0000 (UTC) (envelope-from mckusick@mckusick.com) Received: from chez.mckusick.com (chez.mckusick.com [IPv6:2001:5a8:4:7e72:4a5b:39ff:fe12:452]) by mx1.freebsd.org (Postfix) with ESMTP id AA05E8FC0A for ; Tue, 25 Dec 2012 16:49:18 +0000 (UTC) Received: from chez.mckusick.com (localhost [127.0.0.1]) by chez.mckusick.com (8.14.3/8.14.3) with ESMTP id qBPGnEwl064636; Tue, 25 Dec 2012 08:49:14 -0800 (PST) (envelope-from mckusick@chez.mckusick.com) Message-Id: <201212251649.qBPGnEwl064636@chez.mckusick.com> To: Konstantin Belousov Subject: Re: About QUOTA support in stock kernel (resent) In-reply-to: <20121225152905.GB82219@kib.kiev.ua> Date: Tue, 25 Dec 2012 08:49:14 -0800 From: Kirk McKusick X-Spam-Status: No, score=0.0 required=5.0 tests=MISSING_MID, UNPARSEABLE_RELAY autolearn=failed version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on chez.mckusick.com Cc: Patrick Dung , fs@freebsd.org X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 25 Dec 2012 16:49:18 -0000 I agree with your decision to include quotas by default. When I put them into the system back in the mid-1980's we had two 1 MIP machines with 4Mb of memory that supported the entire Computer Science department at Berkeley. Machine cycles and memory were at a premium and *any* overhead had to be justified. So I made sure that quotas were as lean and light weight as I could. In this day-and-age of huge memories and blindingly fast CPUs including quotas seems like a good idea. Not a lot of folks use them, but those that do would like to have them available. And for those that want a tiny footprint (embedded), they can easily strip them out. Kirk McKusick