From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Fri, 6 Mar 2009 19:18:34 +0800 From: =?utf-8?Q?Am=C3=A9rico?= Wang Subject: Re: [PATCH] Fix ARCH=um segfault on x86-64. Message-ID: <20090306111834.GC8991@hack.private> References: <200903060042.19084.rob@landley.net> <20090306084848.GO22605@hack.private> <10f740e80903060150p565e9703u81d4fe47cb599ab@mail.gmail.com> <10f740e80903060151w779bbd11ld2fcc437ac7ac321@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <10f740e80903060151w779bbd11ld2fcc437ac7ac321@mail.gmail.com> To: Geert Uytterhoeven Cc: =?utf-8?Q?Am=C3=A9rico?= Wang , Rob Landley , user-mode-linux-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org List-ID: On Fri, Mar 06, 2009 at 10:51:12AM +0100, Geert Uytterhoeven wrote: >On Fri, Mar 6, 2009 at 10:50, Geert Uytterhoeven wrote: >> On Fri, Mar 6, 2009 at 09:48, Américo Wang wrote: >>> On Fri, Mar 06, 2009 at 12:42:14AM -0600, Rob Landley wrote: >>>>Apparently, nobody other than me has ever attempted to use User Mode Linux >>>>built from 2.6.28 on x86-64, because it doesn't work.  It still doesn't work >>>>in current git.  I complained about it not working back in January: >>>> >>>>http://sourceforge.net/mailarchive/forum.php?thread_name=200901130159.04389.rob%40landley.net&forum_name=user- >>>>mode-linux-devel >>>>http://lkml.indiana.edu/hypermail/linux/kernel/0901.2/00669.html >>>> >>>>And today, I bothered to track down why. >>>> >>>>This is the commit that broke it, when Peter Anvin merged x86 and x86-64 for >>>>ARCH=um: http://kernel.org/hg/linux-2.6/rev/117978 >>>> >>>>Here's a patch that fixes it for me: >>> >>> Thanks, Bob! >> >> I've just did a build of plain v2.6.28 on amd64 aka x86-64. The >> resulting image ran fine. > >So I'm wondering: why does it work for me and not for you? > It does work well x86_64, but my question is that whether this will break i386 or not, since before, CONFIG_3_LEVEL_PGTABLES depends on EXPERIMENTAL on i386, this patch removes it. -- Do what you love, f**k the rest! F**k the regulations!