From: James S. Johnson <jjohnson@ec...> - 2002-05-28 15:16:44
I'm using the RPM'd kernel and tools (user_mode_linux-188.8.131.52um-0.i386.rpm,
released May 18 10:36) and the full pristine redhat 7.2 file system
(root_fs.rh-7.2-full.pristine.20020312.bz2, released Mar 12 13:31). The host
system is running Redhat 7.2, kernel 2.4.7-10.
This command line (all on one line):
succeeds in bringing up a login terminal, but the other terminals appear to
flash momentarily on the screen and then die, and the following warnings
error stat'ing /dev/pts/p0: No such file or directory
error stat'ing /dev/pts/p1: No such file or directory
I have tried many combinations of device=channel options with this command
line, as described in the "Setting up serial lines and consoles" help page,
but all give the same warning. (I was particularly disappointed that
"con=port:9000" failed to connect. Looks like a neat capability, if I could
get it to work.) I've also tried modifying the target filesystem's
/etc/inittab several different ways without success.
When shutting down, this error occurs:
Kernel panic: read of switch_pipe failed, errno = 9
I've tried running the same kernel and command lines on the tom's root/boot
filesystem from root_fs_toms1.7.205.bz2, released Mar 18 16:16. The same
behavior occurs, except that the kernel shuts down cleanly.
It's probably not relevant to the problem, but I'm running uml_switch and am
able to ping between two uml machines with no apparent errors. I'm also able
to successfully issue commands to running kernels via the uml_mconsole