I am trying to run uml with the skas0 patch - Linux kernel 2.6.12 from kernel.org was patched with Blaisorblade's uml-2.6.12-bb12-skas0.patch.
This is being attempted on a RH9 SMP box - 2.4.20-6 smp.
I see this error:
./linux mem=64M ubd0=fs.cow,rootfs
Checking for /proc/mm...not found
Checking for the skas3 patch in the host...not found
UML running in SKAS0 mode
Checking PROT_EXEC mmap in /tmp...OK
Linux version 2.6.12-bb12-skas0 (abhay@localhost.localdomain) (gcc version 3.2
.2 20030222 (Red Hat Linux 3.2.2-5)) #2 Mon Jan 9 00:53:45 PST 2006
Built 1 zonelists
Kernel command line: mem=64M ubd0=fs.cow,rootfs mode=tt root=98:0
PID hash table entries: 512 (order: 9, 8192 bytes)
Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
Memory: 62208k available
Mount-cache hash table entries: 512
Checking for host processor cmov support...Yes
Checking for host processor xmm support...No
Checking that ptrace can change system call numbers...OK
Checking syscall emulation patch for ptrace...missing
Checking that host ptys support output SIGIO...Yes
Checking that host ptys support SIGIO on close...No, enabling workaround
Checking for /dev/anon on the host...Not available (open failed with errno 2)
NET: Registered protocol family 16
mconsole (version 2) initialized on /home/abhay/.uml/i3X5no/mconsole
ubd: Synchronous mode
VFS: Disk quotas dquot_6.5.1
Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered
NET: Registered protocol family 2
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP established hash table entries: 4096 (order: 3, 32768 bytes)
TCP bind hash table entries: 4096 (order: 2, 16384 bytes)
TCP: Hash tables configured (established 4096 bind 4096)
NET: Registered protocol family 1
NET: Registered protocol family 17
Initialized stdio console driver
Console initialized on /dev/tty0
Initializing software serial port version 1
Creating "fs.cow" as COW file for "rootfs"
 ubda: unknown partition table
kjournald starting.  Commit interval 5 seconds
EXT3-fs: mounted filesystem with ordered data mode.
VFS: Mounted root (ext3 filesystem) readonly.
line_ioctl: tty0: ioctl KDSIGACCEPT called
INIT: version 2.84 booting
Kernel panic - not syncing: copy_context_skas0 - stub-child reports error 123456
EIP: 0023:[<400bcb37>] CPU: 0 Not tainted ESP: 002b:bfa90c9c EFLAGS: 00000246
    Not tainted
EAX: ffffffda EBX: bfa90dd0 ECX: bfa90dd0 EDX: bfa90d50
ESI: bfa90dd0 EDI: bfa90d50 EBP: bfa90f78 DS: 002b ES: 002b
0893f800:  [<0806d758>] show_regs+0xb0/0xd0
0893f820:  [<0805d33b>] panic_exit+0x27/0x48
0893f840:  [<0807f112>] notifier_call_chain+0x22/0x40
0893f870:  [<080716e6>] panic+0x56/0x104
0893f890:  [<0805e90d>] copy_context_skas0+0x19d/0x214
0893f980:  [<0805dfb4>] init_new_context_skas+0x104/0x138
0893f9b0:  [<0806fbd2>] copy_mm+0xf2/0x388
0893fa10:  [<0807082f>] copy_process+0x58f/0xe54
0893fae0:  [<0807114a>] do_fork+0x56/0x1bc
0893fb50:  [<0805b036>] sys_fork+0x2e/0x4c
0893fb80:  [<0805f297>] execute_syscall_skas+0x87/0x8c
0893fc10:  [<0805f2b6>] handle_syscall+0x1a/0x2c
0893fc30:  [<0805e22a>] handle_trap+0x2a/0xf8
0893fc60:  [<0805e747>] userspace+0x183/0x1ac
0893fcd0:  [<0805ee32>] new_thread_handler+0xd6/0x10c
0893fd20:  [<42027568>] 0x42027568
Can I attempt to run 2.6.12 with skas0 on a RH9 host? If yes, are there any patches I can run to fix this?
Else can you recommend a host on which I can safely run 2.6.12-skas0?

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