I've just upgraded UML, and came across this problem: when starting the guest, output stops after "VFS: Mounted root (ext3 filesystem) readonly." - at that point the guest takes 100% CPU, consuming both user and system time.
The host is Debian sarge, running vanilla 2.6.12 with the skas-2.6.12-v8.2 patch. The guest is vanilla 2.6.12 with Paolo's 2.6.12-bs7 patch, though I've verified the problem still occurs without that patch. I can post the host and guest's .configs if needed. The problem occurs on my own images which previously worked on older UML versions, and I've also tried one of the images from the Sourceforge site. Has anyone any idea why this is happening? If not, how should I go about debugging it to help the UML developers? The complication is that this is a headless box. I've added `debug' to the kernel command line, but I don't get an xterm with gdb in. Yes, xterm and gdb are installed and I've run xlogo to test that X11 forwarding is working. Running gdb as `gdb linux' doesn't seem to work because I keep receiving SIGTRAPs. I've heard debugging in skas mode is hard, any pointers here? Thanks in advance for any help you can give. Guest output follows: [EMAIL PROTECTED]:~$ linux ubd1=swap eth0=tuntap,,,x.x.x.29 mem=768M Checking for /proc/mm...found Checking for the skas3 patch in the host...found Checking PROT_EXEC mmap in /tmp...OK Kernel virtual memory size shrunk to 32505856 bytes Linux version 2.6.12-bs7 ([EMAIL PROTECTED]) (gcc version 3.3.5 (Debian 1:3.3.5-13)) #1 Wed Jul 20 12:32:41 IST 2005 Built 1 zonelists Kernel command line: ubd1=swap eth0=tuntap,,,x.x.x.29 mem=768M root=98:0 PID hash table entries: 2048 (order: 11, 32768 bytes) Dentry cache hash table entries: 65536 (order: 6, 262144 bytes) Inode-cache hash table entries: 32768 (order: 5, 131072 bytes) Memory: 467200k 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...OK Checking advanced syscall emulation patch for ptrace...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/ruaidhri/.uml/2JjIYf/mconsole Netdevice 0 : TUN/TAP backend - IP = x.x.x.29 highmem bounce pool size: 64 pages devfs: 2004-01-31 Richard Gooch ([EMAIL PROTECTED]) devfs: boot_options: 0x0 io scheduler noop registered io scheduler anticipatory registered io scheduler deadline registered io scheduler cfq registered loop: loaded (max 8 devices) tun: Universal TUN/TAP device driver, 1.6 tun: (C) 1999-2004 Max Krasnyansky <[EMAIL PROTECTED]> NET: Registered protocol family 2 IP: routing cache hash table of 8192 buckets, 64Kbytes TCP established hash table entries: 131072 (order: 8, 1048576 bytes) TCP bind hash table entries: 65536 (order: 6, 262144 bytes) TCP: Hash tables configured (established 131072 bind 65536) ip_tables: (C) 2000-2002 Netfilter core team NET: Registered protocol family 1 NET: Registered protocol family 10 IPv6 over IPv4 tunneling driver ip6_tables: (C) 2000-2002 Netfilter core team NET: Registered protocol family 17 Initialized stdio console driver Console initialized on /dev/tty0 Initializing software serial port version 1 /dev/ubd/disc0: unknown partition table /dev/ubd/disc1: unknown partition table kjournald starting. Commit interval 5 seconds EXT3-fs: mounted filesystem with ordered data mode. VFS: Mounted root (ext3 filesystem) readonly. -- Ruaidhri ------------------------------------------------------- SF.Net email is sponsored by: Discover Easy Linux Migration Strategies from IBM. Find simple to follow Roadmaps, straightforward articles, informative Webcasts and more! Get everything you need to get up to speed, fast. http://ads.osdn.com/?ad_id=7477&alloc_id=16492&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
