-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Making root filesystems for UML to boot off of is a royal pain. I am surprised it has not gotten any easier. In the past I have installed an empty HD just like I wanted it and then copied the fs onto my uml host computer and it was a real time waster. It seems like there should be some sort of way to launch a UML kernel pointed at a distro install disk and go straight into a text based install. I know Gentoo can do this:
http://www.gentoo.org/doc/en/uml.xml But that's Gentoo. Barely a step away from making your own root_fs using Linux From Scratch. :) I hear Debian can do it too. Unfortunately those distro's are not my cup of tea although I might try those gentoo instructions if I can't get anything else going. I am mainly interested in booting CentOS 4 (RHEL4) and FC3 in this way. The host system is an FC1 box running: Linux copilotconsulting.com 2.4.22-1.2188.nptl #1 Wed Apr 21 20:36:05 EDT 2004 i686 i686 i386 GNU/Linux And the UML kernel is 2.6.8.1 with the matching patch and all standard build options except I turned on magic sysrq support. It should be possible to run a 2.6 UML kernel under a 2.4 host kernel right? I would upgrade the host but it would be quite inconvenient at the moment for reasons too complicated to explain. I thought I would have a go at just booting the UML kernel off of the boot image on the iso and see what happens. Ideally my kernel would run RedHat's init scripts and installer. I haven't figured out how I am going to make it swap ISO images or give it access to the LVM volume that I have set up for it to install into but I'll cross that bridge when I come to it. Usually when I boot my uml kernel I get: [EMAIL PROTECTED] linux-2.6.8.1]$ ./linux ubd0=/mnt/images/boot.iso con0=fd:0,fd:1 Checking for the skas3 patch in the host...not found Checking for /proc/mm...not found Adding 25153536 bytes to physical memory to account for exec-shield gap tracing thread pid = 32378 Linux version 2.6.8.1-1um ([EMAIL PROTECTED]) (gcc version 3.3.2 20031022 (Red Hat Linux 3.3.2-1)) #1 Fri Apr 1 06:41:33 PST 2005 Built 1 zonelists Kernel command line: ubd0=/mnt/images/boot.iso con0=fd:0,fd:1 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: 29076k available Calibrating delay loop... 3191.60 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 mconsole (version 2) initialized on /home/treed/.uml/nZz1zJ/mconsole VFS: Disk quotas dquot_6.5.1 Dquot-cache hash table entries: 1024 (order 0, 4096 bytes) Initializing Cryptographic API RAMDISK driver initialized: 16 RAM disks of 8192K size 1024 blocksize md: md driver 0.90.0 MAX_MD_DEVS=256, MD_SB_DISKS=27 NET: Registered protocol family 2 IP: routing cache hash table of 512 buckets, 4Kbytes TCP: Hash tables configured (established 2048 bind 4096) NET: Registered protocol family 1 NET: Registered protocol family 17 NET: Registered protocol family 8 NET: Registered protocol family 20 Initializing stdio console driver [EMAIL PROTECTED] linux-2.6.8.1]$ It just drops me back at the console. But maybe one in eight times I get this: [EMAIL PROTECTED] linux-2.6.8.1]$ ./linux ubd0=/mnt/images/boot.iso con0=fd:0,fd:1 Checking for the skas3 patch in the host...not found Checking for /proc/mm...not found Adding 7467008 bytes to physical memory to account for exec-shield gap tracing thread pid = 32193 Linux version 2.6.8.1-1um ([EMAIL PROTECTED]) (gcc version 3.3.2 20031022 (Red Hat Linux 3.3.2-1)) #1 Fri Apr 1 06:41:33 PST 2005 Built 1 zonelists Kernel command line: ubd0=/mnt/images/boot.iso con0=fd:0,fd:1 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: 29360k available Calibrating delay loop... 3191.60 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 Kernel panic: fix_range fixing wrong address space, current = 0xa09ca060 <6>SysRq : Show Regs EIP: 0023:[<a012b022>] CPU: 0 Not tainted ESP: 002b:a09da6a4 EFLAGS: 00000202 Not tainted EAX: 00000000 EBX: 00000001 ECX: a09da744 EDX: a09da6c4 ESI: 00000008 EDI: 0000000a EBP: a09da6ac DS: 002b ES: 002b Call Trace: [<a00b1f50>] [<a0018c8a>] [<a00366ea>] [<a0029f86>] [<a0029fef>] [<a001ac71>] [<a001abe7>] [<a001b075>] [<a0017bfd>] [<a00199a7>] [<a016a0db>] [<a002c50b>] [<a002c4ed>] [<a000fd51>] [<a00394de>] [<a00394b6>] [<a012acd1>] [<a0039450>] [<a0013c75>] [<a0016467>] [<a0039450>] [<a0013c50>] [<a00259f2>] [<a0019aac>] [<a0039450>] [<a0019b49>] [<a012ae18>] [<a012b022>] sleeping process 32211 got unexpected signal : 11 And then I have to ctrl-c it. Any suggestions? - -- Tracy R Reed http://[EMAIL PROTECTED] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFCTY9s9PIYKZYVAq0RAuNaAJ468BiOnmcQ/oF0Eercy1ONbR0AYwCfZyDz 5ibIjSxBo01YNfn1gIsc664= =tr8c -----END PGP SIGNATURE----- ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
