From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail191.messagelabs.com (mail191.messagelabs.com [216.82.242.19]) by kanga.kvack.org (Postfix) with SMTP id 0B3AE6B005A for ; Fri, 25 Sep 2009 07:37:51 -0400 (EDT) Date: Fri, 25 Sep 2009 12:36:15 +0100 (BST) From: Hugh Dickins Subject: Re: No more bits in vm_area_struct's vm_flags. In-Reply-To: <4ABC7FBC.4050409@crca.org.au> Message-ID: References: <4AB9A0D6.1090004@crca.org.au> <4ABC7FBC.4050409@crca.org.au> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org To: Nigel Cunningham Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: On Fri, 25 Sep 2009, Nigel Cunningham wrote: > Hugh Dickins wrote: > > > > Does TuxOnIce rely on CONFIG_MMU? If so, then the TuxOnIce patch > > could presumably reuse VM_MAPPED_COPY for now - but don't be > > surprised if that's one we clean away later on. > > Hmm. I'm not sure. The requirements are the same as for swsusp and > uswsusp. Is there some tool to graph config dependencies? If its requirements are the same as theirs, then I think yes, TuxOnIce relies on config MMU: because config HIBERNATION depends on SWAP (kernel/power/Kconfig) and config SWAP depends on MMU (init/Kconfig). But I hesitated to assume that, because in the TuxOnIce patch I have here for reference (e.g. when deciding it'll cause you unwelcome hassle if I move swap_info_struct from swap.h to swapfile.c!), it looked as if you support saving to an ordinary file, not just to a swap file? > Is there some tool to graph config dependencies? I don't know it, but would be nice, and maybe it does exist. Hugh -- 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