[uml-user] uml & apm suspend (to ram)

[Johannes B. <ne...@jo...>]

Hi,

I've been experimenting with UML and setting it up, and its working nicely.
Yesterday, I left an instance running when suspending my laptop. When I
just woke it up this morning, the uml instance was spinning hard in a
loop, but I can't find out what it is doing:

johannes:~$ gdb linux
GNU gdb 6.1-debian
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-linux"...Reading symbols from linux...(no debugging symbols found)...done.
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
 
(gdb) attach 17830
Attaching to program: /usr/bin/linux, process 17830
Reading symbols from shared object read from target memory...(no debugging symbols found)...done.
0xa017ed72 in ?? ()
(gdb) bt
Cannot access memory at address 0xc0000000

strace reports it doing nothing but an occasional
recvfrom,sendto,poll,gettimeofday etc., and continually

rt_sigprocmask(SIG_UNBLOCK, [], [ALRM VTALRM WINCH IO], 8) = 0
rt_sigprocmask(SIG_BLOCK, [ALRM VTALRM IO], NULL, 8) = 0

forever.

In any case, just wanted to report this oddity, I can of course always
stop the UML instance before suspending my laptop.

johannes