From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <478729B3.7010606@de.ibm.com> Date: Fri, 11 Jan 2008 09:32:51 +0100 From: Carsten Otte Reply-To: carsteno@de.ibm.com MIME-Version: 1.0 Subject: Re: [rfc][patch 1/4] include: add callbacks to toggle reference counting for VM_MIXEDMAP pages References: <20071214133817.GB28555@wotan.suse.de> <476B9000.2090707@de.ibm.com> <20071221102052.GB28484@wotan.suse.de> <476B96D6.2010302@de.ibm.com> <20071221104701.GE28484@wotan.suse.de> <1199784954.25114.27.camel@cotte.boeblingen.de.ibm.com> <1199891032.28689.9.camel@cotte.boeblingen.de.ibm.com> <1199891645.28689.22.camel@cotte.boeblingen.de.ibm.com> <6934efce0801091017t7f9041abs62904de3722cadc@mail.gmail.com> <4785D064.1040501@de.ibm.com> <6934efce0801101223g6b022094qc201a82096994b4c@mail.gmail.com> In-Reply-To: <6934efce0801101223g6b022094qc201a82096994b4c@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Jared Hulbert Cc: carsteno@de.ibm.com, Nick Piggin , Linux Memory Management List , Martin Schwidefsky , Heiko Carstens List-ID: Jared Hulbert wrote: >> In fact, I consider pfn_valid() broken on arm if it returns >> false for a pfn that is perfectly valid for use in a pfnmap/mixedmap >> mapping. > > Remember, my interest in creating VM_MIXEDMAP is in mapping Flash into > these pfnmap/mixedmap regions. I don't think it's fair to let > pfn_valid() work for Flash pages, at least for now, because there are > many things you can't do with them that you can do with RAM. You've got a point there. Our memory segments don't differ from regular RAM too much, other then Flash. I think I have to withdraw my statement. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org