Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750696AbWIFIsG (ORCPT ); Wed, 6 Sep 2006 04:48:06 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750703AbWIFIsG (ORCPT ); Wed, 6 Sep 2006 04:48:06 -0400 Received: from mailhub.sw.ru ([195.214.233.200]:38195 "EHLO relay.sw.ru") by vger.kernel.org with ESMTP id S1750696AbWIFIsC (ORCPT ); Wed, 6 Sep 2006 04:48:02 -0400 Message-ID: <44FE8A8D.9090801@openvz.org> Date: Wed, 06 Sep 2006 12:45:01 +0400 From: Pavel Emelianov User-Agent: Thunderbird 1.5 (X11/20060317) MIME-Version: 1.0 To: Nick Piggin CC: Kirill Korotaev , Andrew Morton , Linux Kernel Mailing List , Alan Cox , Christoph Hellwig , Pavel Emelianov , Andrey Savochkin , devel@openvz.org, Rik van Riel , Andi Kleen , Oleg Nesterov , Alexey Dobriyan , Matt Helsley , CKRM-Tech , Hugh Dickins Subject: Re: [PATCH 9/13] BC: locked pages (charge hooks) References: <44FD918A.7050501@sw.ru> <44FD97D1.4070206@sw.ru> <44FE43E7.1030003@yahoo.com.au> In-Reply-To: <44FE43E7.1030003@yahoo.com.au> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1234 Lines: 29 Nick Piggin wrote: > Kirill Korotaev wrote: > >> Introduce calls to BC core over the kernel to charge locked memory. >> >> Normaly new locked piece of memory may appear in insert_vm_struct, >> but there are places (do_mmap_pgoff, dup_mmap etc) when new vma >> is not inserted by insert_vm_struct(), but either link_vma-ed or >> merged with some other - these places call BC code explicitly. >> >> Plus sys_mlock[all] itself has to be patched to charge/uncharge >> needed amount of pages. > > > I still haven't heard your good reasons why such a complex scheme is > required when my really simple proposal of unconditionally charging > the page to the container it was allocated by. Charging the page to the container it was allocated in is a possible and correct way, we agree, but how does this comment refer to locked pages accounting? > > That has the benefit of not being full of user explotable holes and > also not putting such a huge burden on mm/ and the wider kernel in > general. - 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/