On Wed, Jan 24, 2007 at 04:00:27PM +0000, Antoine Martin wrote:
BTW ... please avoid top-posting.
> JuanJo Ciarlante wrote:
> >Hi!
> >Since 2.6.18 FC5 kernels updates and _all_ FC6 kernels, my uml-2.6.17
> >fails with same problem reported before @this list: stops responding
> >after "VFS: Mounted root (ext3 filesystem) readonly."
> >
> >I tracked back and narrowed the kernel versions where the problem
> >started to show:
> > OK: kernel-smp-2.6.17-1.2187_FC5 (last FC5 upd. kernel known to run ok)
> > BAD: kernel-smp-2.6.18-1.2239.fc5 (IIRC 1st non-working FC5 kernel)
> > BAD: kernel-2.6.19-1.2895.fc6 (current FC6 kernel)
> >
> > Note: this is a FC6 uptodate distro, booted with these 3 diff.
> > kernels.
> > FYI those FC5 kernels have same selinux policyversion , so FC6
> > "environment" runs ok, I suggest to those wanting to run UML on FC6
> > to try booting with kernel-smp-2.6.17-1.2187_FC5 as a workaround.
> >
> > <SNIP>
> >
> thanks for that, it should help figure out which release/patch caused
> the problem.
> Could you try the same test using plain kernel.org kernels?
> (2.6.17 and 2.6.18 for a start)
> That should tell us if it is was a redhat patch that introduced the problem.
Indeed I did the following tests, based on released utrace patch (OK
means UML runs w/no problem, BAD means UML stops after VFS root mounting )
#1 2.6.18.6 vanilla: OK
#2 2.6.18.6+utrace,CONFIG_{UP}TRACE=y : BAD (same behaviour as FC6 stock
kernel)
#3 2.6.18.6+utrace,CONFIG_{UP}TRACE unset: BAD (idem)
Curiously, #3 did the very same as #2 (even wrt strace process disposition
and strace "behaviour"), I'd expected #3 to simply fail at boot with
EINVAL or alike (given that no ptrace support was compiled in).
Regards
--
--Juanjo
# Juan Jose Ciarlante (JuanJo) jjo ;at; mendoza.gov.ar #
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