Re: [User-mode-linux-user] 'Double fault on ...' panic

[Gord R. L. <gl...@uf...>]

Hi Jeff,

Here is the console dump:

9 root@sigh (~)# ./linux-2.4.0-test2 
tracing thread pid = 12262
Linux version 2.4.0-test2-1um (jd...@cc...) (gcc version
egcs-2.91.66
 19990314/Linux (egcs-1.1.2 release)) #1 Tue Jun 27 14:32:31 EST 2000
On node 0 totalpages: 4096
zone(0): 256 pages.
zone(1): 3840 pages.
zone(2): 0 pages.
Kernel command line: root=/dev/ubd0
Calibrating delay loop... 495.45 BogoMIPS
Memory: 16080k available
Dentry-cache hash table entries: 2048 (order: 2, 16384 bytes)
Buffer-cache hash table entries: 1024 (order: 0, 4096 bytes)
Page-cache hash table entries: 4096 (order: 2, 16384 bytes)
kmem_create: Poisoning requested, but con given - bdev_cache
Inode-cache hash table entries: 1024 (order: 1, 8192 bytes)
kmem_create: Poisoning requested, but con given - inode_cache
VFS: Diskquotas version dquot_6.4.0 initialized
POSIX conformance testing by UNIFIX
Linux NET4.0 for Linux 2.3
Based upon Swansea University Computer Society NET3.039
kmem_create: Poisoning requested, but con given - skbuff_head_cache
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP: Hash tables configured (established 1024 bind 1024)
Starting kswapd v1.6
pty: 256 Unix98 ptys configured
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
loop: registered device at major 7
loop: enabling 8 loop devices
Initializing stdio console driver
Initializing software serial port version 0
serial line 0 assigned pty /dev/ptyp0
ssl receive thread is pid 12268
devfs: v0.101 (20000621) Richard Gooch (rg...@at...)
devfs: devfs_debug: 0x0
devfs: boot_options: 0x0
VFS: Mounted root (ext2 filesystem) readonly.
Mounted devfs on /dev
INIT: version 2.76 booting
Kernel panic: Double fault on 0xbffff87b - panicing because it wasn't
fixed the first time

The full slackware root filesystem is also in that directory:

2 root@sigh (~)# ls -l root_fs 
-rw-r--r--   1 root     root     629145600 Jun 28 13:15 root_fs

- Gord R. Lamb (gl...@uf...)
  Systems Architect
  U|Force Inc.

On Wed, 28 Jun 2000, Jeff Dike wrote:

> Can we see the entire console output, including the command line?
> 
> That address is on the main process stack, which is somewhat strange since
> that stack isn't used for very much.  In fact, that address is on the top
> page of the stack, which definitely ought to be there.
> 
> 				Jeff