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.
To see at least if the command gets "enough" CPU to halt the UML, I tried:
./linux init=/sbin/halt -f
It didn't, "ps lx" on the host shows:
$ ps lx
0 240 4284 4152 15 0 33000 11000 - R+ pts/1 3:31 ./linux
(Jj9kkn) [/sbin/halt]
1 240 4293 4284 25 0 33000 11000 - S+ pts/1 0:00 ./linux
(Jj9kkn) [/sbin/halt]
1 240 4294 4284 24 0 33000 11000 - S+ pts/1 0:00 ./linux
(Jj9kkn) [/sbin/halt]
1 240 4295 4284 15 0 33000 11000 - S+ pts/1 0:00 ./linux
(Jj9kkn) [/sbin/halt]
1 240 4296 4284 15 0 60 56 - R+ pts/1 2:42 [linux]
, where cpu time for those "R+" procs almost equals wall time;
strace'ing repeats eternally these lines:
$ strace -p 4284
-- SIGCHLD (Child exited) @ 0 (0) ---
waitpid(4296, [{WIFSTOPPED(s) && WSTOPSIG(s) == SIGSEGV}], WSTOPPED) = 4296
ptrace(PTRACE_GETREGS, 4296, 0, 0xa06ab82c) = 0
ptrace(PTRACE_GETFPXREGS, 4296, 0, 0xa06ab8dc) = 0
ptrace(PTRACE_CONT, 4296, 0, SIGSEGV) = 0
:
:
Hope this reports helps to put light on this UML/FC6 bug.
Regards!
--
--Juanjo
# Juan Jose Ciarlante (JuanJo) jjo ;at; mendoza.gov.ar #
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