From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753524Ab1KHApn (ORCPT ); Mon, 7 Nov 2011 19:45:43 -0500 Received: from earthlight.etchedpixels.co.uk ([81.2.110.250]:59744 "EHLO earthlight.etchedpixels.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752680Ab1KHApa (ORCPT ); Mon, 7 Nov 2011 19:45:30 -0500 Date: Tue, 8 Nov 2011 00:46:15 +0000 From: Alan Cox To: Lennart Poettering Cc: Kay Sievers , Davidlohr Bueso , Christoph Hellwig , Hugh Dickins , Andrew Morton , lkml , linux-mm@kvack.org Subject: Re: [RFC PATCH] tmpfs: support user quotas Message-ID: <20111108004615.39477beb@lxorguk.ukuu.org.uk> In-Reply-To: <20111108002520.GB25769@tango.0pointer.de> References: <1320614101.3226.5.camel@offbook> <20111107112952.GB25130@tango.0pointer.de> <1320675607.2330.0.camel@offworld> <20111107135823.3a7cdc53@lxorguk.ukuu.org.uk> <20111107225314.0e3976a6@lxorguk.ukuu.org.uk> <20111107230712.GA25769@tango.0pointer.de> <20111107234337.1dc9d612@lxorguk.ukuu.org.uk> <20111108002520.GB25769@tango.0pointer.de> X-Mailer: Claws Mail 3.7.9 (GTK+ 2.24.7; x86_64-redhat-linux-gnu) Face: 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 Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > And half of the other resource limits are "oddities" too? > For example RLIMIT_SIGPENDING is per-user and so is RLIMIT_MSGQUEUE, > and others too. When you look at the standards - yes. > > And the standards have no idea how a resource limit hit for an fs would > > be reported, nor how an app installer would check for it. Quota on the > > other hand is defined behaviour. > > EDQUOT is POSIX, but afaik there is no POSIX standardized API for quota, > is there? i.e. the reporting of the user hitting quota is defined, but Its part of Unix and its well defined and used by applications, both for hitting quota (the easy bit), checking quota (when checking space for things particularly), and manipulating them The latter bit is nice, it means you can mount with a user quota set in the mount options, and if you want then use quota tools to change the quota of a specific user or two that have special rules. Alan