Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261545AbVBHPhI (ORCPT ); Tue, 8 Feb 2005 10:37:08 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261544AbVBHPhI (ORCPT ); Tue, 8 Feb 2005 10:37:08 -0500 Received: from zcars04f.nortelnetworks.com ([47.129.242.57]:9899 "EHLO zcars04f.nortelnetworks.com") by vger.kernel.org with ESMTP id S261542AbVBHPgx (ORCPT ); Tue, 8 Feb 2005 10:36:53 -0500 Message-ID: <4208DC74.4000107@nortel.com> Date: Tue, 08 Feb 2005 09:36:20 -0600 X-Sybari-Space: 00000000 00000000 00000000 00000000 From: Chris Friesen User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040115 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Dan Malek CC: Benjamin Herrenschmidt , linuxppc64-dev , Arjan van de Ven , linuxppc-dev list , Linux Kernel list Subject: Re: question on symbol exports References: <41FECA18.50609@nortelnetworks.com> <1107243398.4208.47.camel@laptopd505.fenrus.org> <41FFA21C.8060203@nortelnetworks.com> <1107273017.4208.132.camel@laptopd505.fenrus.org> <20050204203050.GA5889@dmt.cnet> <4203D793.1040604@nortel.com> <1107595148.30302.5.camel@gaston> <42077EE0.2060505@nortel.com> <1107812101.7734.42.camel@gaston> In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 887 Lines: 22 Dan Malek wrote: > > On Feb 7, 2005, at 4:35 PM, Benjamin Herrenschmidt wrote: > >> Interesting... more than no swap, you must also make sure you have no >> r/w mmap'ed file (which are technically equivalent to swap). > > > Yeah, I kinda had a similar thought. Just because you aren't > swapping doesn't mean the VM subsystem isn't looking at dirty bits, > too. It could potentially steal a page that it thinks can be replaced > from either a zero-fill or reading again from persistent storage. In our existing case, the app also mlock()s the pages in question. This should get around these two possible sources of inaccuracy. Chris - 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/