Hi,
I've been trying to get user-mode-linux running a reasonably recent linux
setup in Amazon's EC2. The host is required to be Amazon's 2.6.16-xenU
kernel. In my case, it's running Ubuntu Gutsy. The guest is the version of
UML that comes with Ubuntu, 2.6.22-rc5.
I think the problem must be with the libc. If I use an older libc on both
the host and the guest, I can get it running. With a newer libc on the
guest, it locks up after mounting the root fs. With a newer libc on the
host, I get the error pasted below. Any help would be appreciated!
Core dump limits :
soft - 0
hard - NONE
Checking that ptrace can change system call numbers...OK
Checking syscall emulation patch for ptrace...OK
Checking advanced syscall emulation patch for ptrace...OK
Checking for tmpfs mount on /dev/shm...OK
Checking PROT_EXEC mmap in /dev/shm/...OK
Checking for the skas3 patch in the host:
- /proc/mm...not found: No such file or directory
- PTRACE_FAULTINFO...not found
- PTRACE_LDT...not found
UML running in SKAS0 mode
[42949372.960000] Linux version 2.6.22-rc5 ([EMAIL PROTECTED]) (gcc version
4.1.3 20070629 (prerelease) (Ubuntu 4.1.2-13ubuntu2)) #2 Mon Jul 2 10:14:22
GMT 2007
[42949372.960000] Built 1 zonelists. Total pages: 8128
[42949372.960000] Kernel command line: ubd0=laforge-root.img root=98:0
[42949372.960000] PID hash table entries: 128 (order: 7, 512 bytes)
[42949372.960000] Dentry cache hash table entries: 4096 (order: 2, 16384
bytes)
[42949372.960000] Inode-cache hash table entries: 2048 (order: 1, 8192
bytes)
[42949372.960000] Memory: 29312k available
[42949374.140000] Mount-cache hash table entries: 512
[42949374.140000] Checking for host processor cmov support...Yes
[42949374.140000] Checking for host processor xmm support...No
[42949374.140000] Checking that host ptys support output SIGIO...Yes
[42949374.140000] Checking that host ptys support SIGIO on close...No,
enabling workaround
[42949374.140000] Using 2.6 host AIO
[42949374.140000] NET: Registered protocol family 16
[42949374.140000] NET: Registered protocol family 2
[42949374.430000] IP route cache hash table entries: 1024 (order: 0, 4096
bytes)
[42949374.430000] TCP established hash table entries: 1024 (order: 1, 8192
bytes)
[42949374.430000] TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
[42949374.430000] TCP: Hash tables configured (established 1024 bind 1024)
[42949374.430000] TCP reno registered
[42949374.490000] Checking host MADV_REMOVE support...OK
[42949374.490000] mconsole (version 2) initialized on
/root/.uml/mHLBJP/mconsole
[42949374.490000] Mapper v0.1
[42949374.490000] mmapper_init - find_iomem failed
[42949374.490000] UML Watchdog Timer
[42949374.490000] Host TLS support detected
[42949374.490000] Detected host type: i386
[42949374.490000] VFS: Disk quotas dquot_6.5.1
[42949374.490000] Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
[42949374.490000] JFS: nTxBlock = 229, nTxLock = 1832
[42949374.490000] SGI XFS with ACLs, security attributes, realtime, large
block numbers, no debug enabled
[42949374.490000] SGI XFS Quota Management subsystem
[42949374.490000] io scheduler noop registered
[42949374.490000] io scheduler anticipatory registered (default)
[42949374.490000] io scheduler deadline registered
[42949374.490000] io scheduler cfq registered
[42949374.650000] SoftDog: cannot register miscdev on minor=130 (err=-16)
[42949374.650000] TCP cubic registered
[42949374.650000] NET: Registered protocol family 1
[42949374.650000] NET: Registered protocol family 17
[42949374.650000] Initialized stdio console driver
[42949374.650000] Console initialized on /dev/tty0
[42949374.650000] Initializing software serial port version 1
[42949374.710000] ubda: unknown partition table
[42949374.750000] VFS: Mounted root (ext2 filesystem) readonly.
[42949374.950000] Kernel panic - not syncing: start_userspace : expected
SIGSTOP, got status = 2943
[42949374.950000]
[42949374.950000] EIP: 0073:[<bfffe402>] CPU: 0 Not tainted ESP:
007b:b7de4fc0 EFLAGS: 00200246
[42949374.950000] Not tainted
[42949374.950000] EAX: 00000000 EBX: 00000ab2 ECX: 00000013 EDX: 00000ab2
[42949374.950000] ESI: 00000aae EDI: 00000011 EBP: b7de4fd8 DS: 007b ES:
007b
[42949374.950000] 08327e0c: [<0806ce8c>] show_regs+0xb4/0xb9
[42949374.950000] 08327e38: [<0805b038>] panic_exit+0x25/0x3f
[42949374.950000] 08327e4c: [<0807c418>] notifier_call_chain+0x21/0x46
[42949374.950000] 08327e6c: [<0807c4b3>]
__atomic_notifier_call_chain+0x17/0x19
[42949374.950000] 08327e88: [<0807c4ca>]
atomic_notifier_call_chain+0x15/0x17
[42949374.950000] 08327ea4: [<08071532>] panic+0x52/0xd8
[42949374.950000] 08327ec4: [<0806a3f3>] start_userspace+0xd0/0x11c
[42949374.950000] 08327ee4: [<0805b32a>] init_new_context_skas+0x107/0x14a
[42949374.950000] 08327f04: [<080ae8da>] do_execve+0x89/0x1cb
[42949374.950000] 08327f24: [<08057ced>] execve1+0x2a/0x54
[42949374.950000] 08327f48: [<08057d2c>] um_execve+0x15/0x41
[42949374.950000] 08327f64: [<08059e25>] kernel_execve+0x2c/0x37
[42949374.950000] 08327f84: [<080576cf>] run_init_process+0x1b/0x20
[42949374.950000] 08327f98: [<08057764>] init_post+0x90/0xb8
[42949374.950000] 08327fa4: [<08049879>] kernel_init+0x7e/0x85
[42949374.950000] 08327fb4: [<08067315>] run_kernel_thread+0x37/0x42
[42949374.950000] 08327fe0: [<0805b49d>] new_thread_handler+0x57/0x7e
[42949374.950000] 08327ffc: [<a55a5a5a>] 0xa55a5a5a
[42949374.950000]
Segmentation fault
--
Steven Hazel
[EMAIL PROTECTED]
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