I wasn't able to boot UML on my new server, I have tried most uml patches and kernel versions with no success.. # ./linux Checking for the skas3 patch in the host...found Checking for /proc/mm...found Linux version 2.6.8.1-1um (root@localhost) (gcc version 3.3.2 20031022 (Red Hat Linux 3.3.2-1)) #1 Fri Aug 27 10:02:17 AST 2004 Built 1 zonelists Kernel command line: root=98:0 PID hash table entries: 16 (order 4: 128 bytes) Dentry cache hash table entries: 8192 (order: 3, 32768 bytes) Inode-cache hash table entries: 4096 (order: 2, 16384 bytes) Memory: 27616k available Calibrating delay loop... 3971.48 BogoMIPS Mount-cache hash table entries: 512 (order: 0, 4096 bytes) Checking for host processor cmov support...Yes Checking for host processor xmm support...No Checking that ptrace can change system call numbers...OK 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 SCSI subsystem initialized mconsole (version 2) initialized on /root/.uml/u0qnZB/mconsole UML Watchdog Timer VFS: Disk quotas dquot_6.5.1 Dquot-cache hash table entries: 1024 (order 0, 4096 bytes) Coda Kernel/Venus communications, v6.0.0, coda@cs.cmu.edu devfs: 2004-01-31 Richard Gooch (rgooch@atnf.csiro.au) devfs: boot_options: 0x0 Installing knfsd (copyright (C) 1996 okir@monad.swb.de). udf: registering filesystem Kernel panic: map_memory(0x42800000, 3, 0xce7000, 4096, 1, 1, 1) failed, err = -1 <6>SysRq : Show Regs EIP: 0073:[<4026c7a1>] CPU: 0 Not tainted ESP: 007b:4046cfa0 EFLAGS: 00000216 Not tainted EAX: 00000000 EBX: 00007f09 ECX: 00000013 EDX: 00007f09 ESI: 00000000 EDI: 00000000 EBP: 00000000 DS: 007b ES: 007b Call Trace: [<40165170>] [<4001a0aa>] [<4003cc66>] [<40030676>] [<400306df>] [<40014979>] [<4001eab4>] [<4001eafc>] [<40017823>] [<40019591>] [<4026c827>] [<40017883>] [<400198c4>] [<4026c7a1>] [<40019833>] [<4001ec10>] [<4001ec29>] [<400199b2>] [<4026c827>] [<4026c558>] [<40144800>] [<4026c827>] [<4026c827>] [<400179c8>] [<4026c827>] [<400179c8>] [<4026c827>] [<400179c8>] [<400148cd>] [<4005a97a>] [<4005aa31>] [<4005aa0f>] [<4005ab04>] [<4005aeee>] [<4005af46>] [<401447cd>] [<40049ffe>] [<40048ecc>] [<40007cc3>] [<40002604>] [<4000f5a0>] [<4000f5c7>] [<4000f5a0>] [<4001504d>] [<4000f5a0>] [<40015028>] [<400178ca>] [<4002d7d0>] [<4000f5a0>] [<4002d821>] [<4000f5a0>] [<4001e34a>] [<4000f5a0>] [<4026c558>] [<4026c7a1>] Segmentation fault (core dumped) My server is running on P4, 2GB RAM My UML config is attached. Thanks alot, Ali