Dear UML developers,
I use UML for about two years, especially the version linux-2.4.24um-3
(uml-patch-2.4.24-3.bz2), and is quite stable.
Now I've compiled the last patch from SourceForge (uml-patch-2.4.27-1)
and sometimes (sporadically, maybe 1 out of 50 tries) my UMLs won't start.
Today I've pointed out this.
I am affraid this is not reproducible, but the thing is that with 2.4.24 based
guests, I've never observed this problem!
In this case I had only one UML guest running on my host, and I believe
at least 48 Mbyte of RAM free.
Maybe the UML patch uml-patch-2.4.27-1 is not o.k. ?
MY HOST Kernel: 2.4.26skas (awsomely stable!)
My UML: last from Source-forge, patched Kernel linux-2.4.27
uml-patch-2.4.27-1.bz2 Nov 10 12:18
Command-line:
/usr/local/bin/linux-2.4.27um-1 umid=zip devfs=nomount con=pts con0=fd:0,fd:1
mem=48M
+++clip -- bad initialized UML +++clip+++
Checking for the skas3 patch in the host...found
Checking for /proc/mm...found
Checking PROT_EXEC mmap in /tmp...OK
Checking for /dev/anon on the host...Not available (open failed with errno 2)
Linux version 2.4.27-1um ([EMAIL PROTECTED]) (gcc version 2.96 20000731 (Red Hat
Linux 7.1 2.96-98)) #1 Wed Mar 23 19:47:39 WET 2005
On node 0 totalpages: 12288
zone(0): 12288 pages.
zone(1): 0 pages.
zone(2): 0 pages.
Kernel command line: ubd0=/mnt/hdc1/fs_deb3B_4_t.ex2 mem=48M eth0=tuntap,tap3
if=10.1.7.3 devfs=nomount con=pts con0=fd:0,fd:1 root=/dev/ubd0
Calibrating delay loop... 298.18 BogoMIPS
Memory: 44948k available
Dentry cache hash table entries: 8192 (order: 4, 65536 bytes)
Inode cache hash table entries: 4096 (order: 3, 32768 bytes)
Mount cache hash table entries: 512 (order: 0, 4096 bytes)
Buffer cache hash table entries: 1024 (order: 0, 4096 bytes)
Page-cache hash table entries: 16384 (order: 4, 65536 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 syscall emulation patch for ptrace...missing
Kernel panic: Segfault with no mm
In idle task - not syncing
<6>SysRq : Show Regs
EIP: 0000:[<00000000>] CPU: 0 Not tainted EFLAGS: 00000000
Not tainted
EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: 00000000
ESI: 00000000 EDI: 00000000 EBP: 00000000 DS: 0000 ES: 0000
Call Trace: [<a01ff789>] [<a02004ed>] [<a00fbd06>] [<a00e69db>] [<a001c79e>]
[<a01fa81b>] [<a01ffdfb>] [<a01ffde8>] [<a000fde3>] [<a00e5df0>] [<a01ffde8>]
[<a00e3f1e>] [<a00e62b8>] [<a00e61c1>] [<a00ec6ee>] [<a00ec6e1>] [<a00e6311>]
[<a0173428>] [<a00ec68f>] [<a00ec689>] [<a00e6311>] [<a0173428>] [<a00ec68f>]
[<a00ec689>] [<a00e6311>] [<a0173428>] [<a00ec68f>] [<a00ec689>] [<a00e6311>]
<<<another run brought my UML up>>>
+++clip -- correctly initialized UML +++clip+++
Checking for the skas3 patch in the host...found
Checking for /proc/mm...found
Checking PROT_EXEC mmap in /tmp...OK
Checking for /dev/anon on the host...Not available (open failed with errno 2)
Linux version 2.4.27-1um ([EMAIL PROTECTED]) (gcc version 2.96 20000731 (Red Hat
Linux 7.1 2.96-98)) #1 Wed Mar 23 19:47:39 WET 2005
On node 0 totalpages: 12288
zone(0): 12288 pages.
zone(1): 0 pages.
zone(2): 0 pages.
Kernel command line: ubd0=/mnt/hdc1/fs_deb3B_4_t.ex2 mem=48M eth0=tuntap,tap3
if=10.1.7.3 devfs=nomount con=pts con0=fd:0,fd:1 root=/dev/ubd0
Calibrating delay loop... 298.18 BogoMIPS
Memory: 44948k available
Dentry cache hash table entries: 8192 (order: 4, 65536 bytes)
Inode cache hash table entries: 4096 (order: 3, 32768 bytes)
Mount cache hash table entries: 512 (order: 0, 4096 bytes)
Buffer cache hash table entries: 1024 (order: 0, 4096 bytes)
Page-cache hash table entries: 16384 (order: 4, 65536 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 syscall emulation patch for ptrace...missing
Checking that host ptys support output SIGIO...Yes
Checking that host ptys support SIGIO on close...No, enabling workaround
POSIX conformance testing by UNIFIX
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Initializing RT netlink socket
Starting kswapd
VFS: Disk quotas vdquot_6.5.1
Journalled Block Device driver loaded
devfs: v1.12c (20020818) Richard Gooch ([EMAIL PROTECTED])
devfs: boot_options: 0x0
Installing knfsd (copyright (C) 1996 [EMAIL PROTECTED]).
pty: 256 Unix98 ptys configured
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
loop: loaded (max 8 devices)
PPP generic driver version 2.4.2
Universal TUN/TAP device driver 1.5 (C)1999-2002 Maxim Krasnyansky
Initializing software serial port version 1
mconsole (version 2) initialized on /home/guest/.uml/zip/mconsole
Partition check:
ubda: unknown partition table
UML Audio Relay (host dsp = /dev/sound/dsp, host mixer = /dev/sound/mixer)
Initializing stdio console driver
Netdevice 0 : TUN/TAP backend -
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP, IGMP
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP: Hash tables configured (established 4096 bind 8192)
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
VFS: Mounted root (ext2 filesystem) readonly.
INIT: version 2.84 booting
Checking root file system...
fsck 1.27 (8-Mar-2002)
deb3B_4: clean, 2073/32768 files, 51182/131072 blocks
Cleaning: /etc/network/ifstate.
Using now IP: if=10.1.7.3
Filled interfaces for 2.4.27-1um-1
Setting up IP spoofing protection: rp_filter.
Configuring network interfaces: done.
INIT: Entering runlevel: 2
Starting system log daemon: syslogd.
Starting kernel log daemon: klogd.
Starting internet superserver: inetd.
Starting MySQL: [ OK ]
Starting OpenBSD Secure Shell server: sshd.
Starting periodic command scheduler: cron.
Virtual console 2 assigned device '/dev/pts/6'
Virtual console 1 assigned device '/dev/pts/7'
Debian GNU/Linux 3.0 busy4 ttys/0
busy4 login:
<<<and this is my UML prompt, in this case, ok>>>
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