Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262170AbUDEMjj (ORCPT ); Mon, 5 Apr 2004 08:39:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262221AbUDEMjj (ORCPT ); Mon, 5 Apr 2004 08:39:39 -0400 Received: from mail.shareable.org ([81.29.64.88]:57751 "EHLO mail.shareable.org") by vger.kernel.org with ESMTP id S262170AbUDEMji (ORCPT ); Mon, 5 Apr 2004 08:39:38 -0400 Date: Mon, 5 Apr 2004 13:39:33 +0100 From: Jamie Lokier To: "Eric W. Biederman" Cc: =?iso-8859-1?Q?J=F6rn?= Engel , Pavel Machek , mj@ucw.cz, jack@ucw.cz, "Patrick J. LoPresti" , linux-kernel@vger.kernel.org Subject: Re: [PATCH] cowlinks v2 Message-ID: <20040405123933.GC19842@mail.shareable.org> References: <20040402180128.GA363@elf.ucw.cz> <20040402181707.GA28112@wohnheim.fh-wedel.de> <20040402182357.GB410@elf.ucw.cz> <20040402200921.GC653@mail.shareable.org> <20040402213933.GB246@elf.ucw.cz> <20040403010425.GJ653@mail.shareable.org> <20040403194344.GA5477@mail.shareable.org> <20040405083549.GD28924@wohnheim.fh-wedel.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 697 Lines: 17 Eric W. Biederman wrote: > As scheme that does not isolate the invalidate to the new copy worries me. It is possible to isolate the invalidate to mappings of the newly broken cowlink only. There is still the problem of MAP_LOCKED, or more realistically mlockall() used with mappings of glibc etc. on a filesystem snapshot made using cowlinks. The easiest thing is obviously to break the cowlink when a mapping is locked, but it's not nice. -- Jamie - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/