Hi, Apart from building the kernel, did you download the filesystem from the UML official page. Once you have downloaded you can run using ./linux ubd0=root_fs mem=512M The second memory parameter is not mandatory, but i find it a good idea to specify otherwise it fails sometimes due to insufficient swap space. Thanks On Tue, Mar 18, 2008 at 2:43 PM, ravikumar <ravikumar.vallabhu@xxxxxxxxx> wrote: > Hi all, > > I'm reading about UML , in that process i've just built the UML and > tried to run the UML binary 'linux'. > > I got the following error message. > > > Couldn't stat "root_fs" : err = 2 > Failed to initialize ubd device 0 :Couldn't determine size of device's file > VFS: Cannot open root device "98:0" or unknown-block(98,0) > Please append a correct "root=" boot option; here are the available > partitions: > Kernel panic - not syncing: VFS: Unable to mount root fs on > unknown-block(98,0) > > EIP: 0073:[<009b6402>] CPU: 0 Not tainted ESP: 007b:00f39fc0 EFLAGS: > 00000246 > Not tainted > EAX: 00000000 EBX: 00006642 ECX: 00000013 EDX: 00006642 > ESI: 0000663f EDI: 00000011 EBP: 00f39fd8 DS: 007b ES: 007b > 08ca2e64: [<08069598>] show_regs+0xb4/0xb9 > 08ca2e90: [<08057b64>] panic_exit+0x25/0x3f > 08ca2ea4: [<08078bb8>] notifier_call_chain+0x21/0x46 > 08ca2ec4: [<08078c53>] __atomic_notifier_call_chain+0x17/0x19 > 08ca2ee0: [<08078c6a>] atomic_notifier_call_chain+0x15/0x17 > 08ca2efc: [<0806db2a>] panic+0x52/0xdd > 08ca2f1c: [<08049b1c>] mount_block_root+0x100/0x116 > 08ca2f70: [<08049b7e>] mount_root+0x4c/0x54 > 08ca2f94: [<08049c64>] prepare_namespace+0xde/0x10a > 08ca2fa4: [<0804984a>] kernel_init+0x79/0x85 > 08ca2fb4: [<08063981>] run_kernel_thread+0x37/0x42 > 08ca2fe0: [<08057f51>] new_thread_handler+0x57/0x7e > 08ca2ffc: [<a55a5a5a>] 0xa55a5a5a > > Segmentation fault (core dumped) > > Can any body tell me the what is the problem? > > Regards, > Ravikumar > > -- > To unsubscribe from this list: send an email with > "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx > Please read the FAQ at http://kernelnewbies.org/FAQ > > -- Thanks & Regards, ******************************************** Manish Katiyar ( http://mkatiyar.googlepages.com ) 3rd Floor, Fair Winds Block EGL Software Park Off Intermediate Ring Road Bangalore 560071, India *********************************************** -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
