From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.92] helo=mail.sourceforge.net) by sc8-sf-list1-new.sourceforge.net with esmtp (Exim 4.43) id 1KHEEL-0000aN-Ko for user-mode-linux-devel@lists.sourceforge.net; Fri, 11 Jul 2008 01:43:53 -0700 Received: from mail.gmx.net ([213.165.64.20]) by mail.sourceforge.net with smtp (Exim 4.44) id 1KHEEI-0003ZZ-1V for user-mode-linux-devel@lists.sourceforge.net; Fri, 11 Jul 2008 01:43:53 -0700 From: Toralf =?iso-8859-1?q?F=F6rster?= Date: Fri, 11 Jul 2008 10:43:32 +0200 References: <200807101619.54052.toralf.foerster@gmx.de> <200807102010.02772.toralf.foerster@gmx.de> <20080710193019.GA20112@c2.user-mode-linux.org> In-Reply-To: <20080710193019.GA20112@c2.user-mode-linux.org> MIME-Version: 1.0 Message-Id: <200807111043.39103.toralf.foerster@gmx.de> Subject: Re: [uml-devel] UML kernel failed to start betvee 2.6.8-rc8 and current git sources List-Id: The user-mode Linux development list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============2027242458==" Sender: user-mode-linux-devel-bounces@lists.sourceforge.net Errors-To: user-mode-linux-devel-bounces@lists.sourceforge.net To: Jeff Dike Cc: LKML , uml-devel --===============2027242458== Content-Type: multipart/signed; boundary="nextPart1782819.mdne5nG5nl"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit --nextPart1782819.mdne5nG5nl Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline At Thursday 10 July 2008 21:30:19 Jeff Dike wrote : > On Thu, Jul 10, 2008 at 08:09:59PM +0200, Toralf F=F6rster wrote: > > At Thursday 10 July 2008 18:35:15 Jeff Dike wrote : > >=20 > > > What's the host? > >=20 > > tfoerste@n22 ~ $ uname -a > > Linux n22 2.6.25-gentoo-r6 #4 Thu Jul 10 19:49:36 CEST 2008 i686 Intel(= R) Pentium(R) M processor 1700MHz GenuineIntel GNU/Linux > >=20 > > BTW, this works fine and shows only the config : > > n22 ~ # linux-v2.6.26-rc8-227 --showconfig=20 > >=20 > > whereas this failed: > >=20 > > n22 ~ # linux-v2.6.26-rc9-56 --showconfig > > Locating the bottom of the address space ... 0x0 > > Locating the top of the address space ... 0xc0000000 >=20 > OK, I believe you're seeing the same bug as Uli saw here: >=20 > http://marc.info/?l=3Dlinux-kernel&m=3D121011518003727&w=3D2 >=20 > More precise symptoms are here: >=20 > http://marc.info/?l=3Dlinux-kernel&m=3D121011722806093&w=3D2 >=20 > I never did figure that one out. I had the same kernel version, same > toolchain, same everything as far as I could see, and I couldn't > reproduce it, except with a binary that he gave me. >=20 > You're seeing it on i386, whereas he saw it on x86_64. >=20 > The underlying problem is that somehow the UML initcalls aren't being > run, which is why you're seeing all zeros in the register dump. >=20 > If you bisect this, I bet you end up at the no-unit-at-a-time patch > that he ended up at. And I have no idea what that has to do with > anything. >=20 You're right : tfoerste@n22 ~/devel/linux-2.6 $ git bisect good 4f81c5350b44bcc501ab6f8a089b16d064b4d2f6 is first bad commit commit 4f81c5350b44bcc501ab6f8a089b16d064b4d2f6 Author: Jeff Dike Date: Mon Jul 7 13:36:56 2008 -0400 [UML] fix gcc ICEs and unresolved externs There are various constraints on the use of unit-at-a-time: - i386 uses no-unit-at-a-time for pre-4.0 (not 4.3) - x86_64 uses unit-at-a-time always =2E.. =2D-=20 MfG/Sincerely Toralf F=F6rster pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3 --nextPart1782819.mdne5nG5nl Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (GNU/Linux) iEYEABECAAYFAkh3HTsACgkQhyrlCH22naOJqgCbBpwKVJ50hAF0Gl809pg9FJPZ WfsAoLbYLzivf0EDIQCg8yT7ttuUMkG2 =WDhY -----END PGP SIGNATURE----- --nextPart1782819.mdne5nG5nl-- --===============2027242458== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline ------------------------------------------------------------------------- Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW! Studies have shown that voting for your favorite open source project, along with a healthy diet, reduces your potential for chronic lameness and boredom. Vote Now at http://www.sourceforge.net/community/cca08 --===============2027242458== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel --===============2027242458==--