Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752512AbZIYLh7 (ORCPT ); Fri, 25 Sep 2009 07:37:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752461AbZIYLh5 (ORCPT ); Fri, 25 Sep 2009 07:37:57 -0400 Received: from mk-filter-1-a-1.mail.uk.tiscali.com ([212.74.100.52]:16900 "EHLO mk-filter-1-a-1.mail.uk.tiscali.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752426AbZIYLhx (ORCPT ); Fri, 25 Sep 2009 07:37:53 -0400 X-Trace: 266405067/mk-filter-1.mail.uk.tiscali.com/B2C/$b2c-THROTTLED-DYNAMIC/b2c-CUSTOMER-DYNAMIC-IP/79.69.26.166/None/hugh.dickins@tiscali.co.uk X-SBRS: None X-RemoteIP: 79.69.26.166 X-IP-MAIL-FROM: hugh.dickins@tiscali.co.uk X-SMTP-AUTH: X-MUA: X-IP-BHB: Once X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: ArcEAP5HvEpPRRqm/2dsb2JhbACBUdVxhBwF X-IronPort-AV: E=Sophos;i="4.44,451,1249254000"; d="scan'208";a="266405067" Date: Fri, 25 Sep 2009 12:36:15 +0100 (BST) From: Hugh Dickins X-X-Sender: hugh@sister.anvils To: Nigel Cunningham cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org 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: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1243 Lines: 30 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 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/