From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.92] helo=mail.sourceforge.net) by sc8-sf-list1.sourceforge.net with esmtp (Exim 4.30) id 1E8ja2-0004Ue-3g for user-mode-linux-devel@lists.sourceforge.net; Fri, 26 Aug 2005 12:09:34 -0700 Received: from silver.veritas.com ([143.127.12.111]) by mail.sourceforge.net with esmtp (Exim 4.44) id 1E8ja1-0005GJ-Ks for user-mode-linux-devel@lists.sourceforge.net; Fri, 26 Aug 2005 12:09:34 -0700 From: Hugh Dickins In-Reply-To: <200508262023.29170.blaisorblade@yahoo.it> Message-ID: References: <200508262023.29170.blaisorblade@yahoo.it> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Subject: [uml-devel] Re: [RFC] [patch 0/18] remap_file_pages protection support (for UML), try 3 Sender: user-mode-linux-devel-admin@lists.sourceforge.net Errors-To: user-mode-linux-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: The user-mode Linux development list List-Post: List-Help: List-Subscribe: , List-Archive: Date: Fri, 26 Aug 2005 20:11:20 +0100 (BST) To: Blaisorblade Cc: Andrew Morton , Ingo Molnar , Andi Kleen , LKML , Jeff Dike , Bodo Stroesser , user-mode-linux-devel@lists.sourceforge.net On Fri, 26 Aug 2005, Blaisorblade wrote: > This is a followup to my post of last week (Aug 12) about remap_file_pages > protection support. I've improved and consolidated the patches and updated > them against 2.6.13-rc6/rc7 (the same patches apply against both versions). > I'm sending the full patch series only to akpm, mingo and LKML. > > I've also reduced them to only 18, and made the splitting more significant. > I'm not resending all the patches for foreign architectures, because they're > almost unchanged since last time (there's just a trivial reject from ppc32, > because one change has already been done after -rc4). > > I'm working on this to provide support for UML, which currently easily creates > more than 64K (the default limit) vma's for a single process. Actually, it > needs one VMA per each page. So, with this patch and specific UML support, > which Ingo wrote and which I'm porting to recent UMLs. I'll try to take a look sometime next week - or, if I wait until next Friday, can we expect it to have come down to 9 patches ;-? I should say, my initial reaction is very much like Andi's last week. sys_remap_file_pages solves a real problem, but it does so by breaking lots of rules. For more than a year after it came in, almost every development we tried in mm would come up against "but then what do we do about the nonlinear mappings?". That has settled down now, but I don't look forward to extending it. On the other hand, UML does deserve better support. Hugh ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel