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SubjectRe: 2.6.24-mm1 bugs
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Date
> >  - UML doesn't boot: guest is 2.6.24-mm1 also, haven't tried any
> > other. Same guest boots fine on 2.6.24 host.
>
> What does it do?

See below.

>
> Any chance you can bisect it?

It would be a bit painful, because this is the only machine I can use.
I much prefer bisecting UML kernels :)

Thanks,
Miklos




GNU gdb 6.6.50.20070726-cvs
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This GDB was configured as "x86_64-suse-linux"...
Using host libthread_db library "/lib64/libthread_db.so.1".
(gdb) r umid=uml
Starting program: /store/quilt/linux/linux umid=uml
Core dump limits :
soft - 0
hard - NONE
Checking that ptrace can change system call numbers...OK
Checking syscall emulation patch for ptrace...missing
Checking for tmpfs mount on /dev/shm...nothing mounted on /dev/shm
Checking PROT_EXEC mmap in /tmp/...OK
Checking for the skas3 patch in the host:
- /proc/mm...not found: No such file or directory
- PTRACE_FAULTINFO...not found: Invalid argument
- PTRACE_LDT...not found: Invalid argument
UML running in SKAS0 mode
Adding 24977408 bytes to physical memory to account for exec-shield gap
[ 0.000000] Linux version 2.6.24-mm1 (mszeredi@tucsk) (gcc version 4.2.1 (SUSE Linux)) #26 Fri Feb 15 11:05:54 CET 2008
[ 0.010000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 14179
[ 0.010000] Kernel command line: root=98:0
[ 0.010000] PID hash table entries: 256 (order: 8, 1024 bytes)
[ 0.010000] Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
[ 0.010000] Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
[ 0.010000] Memory: 29504k available
[ 0.270000] Mount-cache hash table entries: 512
[ 0.270000] Checking for host processor cmov support...Yes
[ 0.270000] Checking that host ptys support output SIGIO...Yes
[ 0.270000] Checking that host ptys support SIGIO on close...No, enabling workaround
[ 0.270000] net_namespace: 184 bytes
[ 0.270000] Using 2.6 host AIO
[ 0.270000] NET: Registered protocol family 16
[ 0.300000] NET: Registered protocol family 2
[ 0.310000] Time: itimer clocksource has been installed.
[ 0.390000] IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.390000] TCP established hash table entries: 2048 (order: 2, 16384 bytes)
[ 0.390000] TCP bind hash table entries: 2048 (order: 3, 40960 bytes)
[ 0.390000] TCP: Hash tables configured (established 2048 bind 2048)
[ 0.390000] TCP reno registered
[ 0.420000] Checking host MADV_REMOVE support...<3>MADV_REMOVE failed, err = -38
[ 0.420000] Can't release memory to the host - memory hotplug won't be supported
[ 0.420000] mconsole (version 2) initialized on /home/mszeredi/.uml/uml/mconsole
[ 0.420000] Host TLS support detected
[ 0.420000] Detected host type: x86_64 (GDT indexes 12 to 15)
[ 0.420000] fuse init (API version 7.9)
[ 0.420000] io scheduler noop registered (default)
[ 0.420000] loop: module loaded
[ 0.420000] TCP cubic registered
[ 0.420000] NET: Registered protocol family 1
[ 0.420000] Initialized stdio console driver
[ 0.420000] Console initialized on /dev/tty0
[ 0.420000] console [tty0] enabled
[ 0.420000] console [mc-1] enabled
[ 0.420000] ubda: unknown partition table
[ 0.420000] kjournald starting. Commit interval 5 seconds
[ 0.420000] EXT3-fs: mounted filesystem with ordered data mode.
[ 0.420000] VFS: Mounted root (ext3 filesystem) readonly.
[ 0.420000] Failed to get registers from stub, errno = 3
[ 0.420000] wait_stub_done : failed to wait for SIGTRAP, pid = 30073, n = 30073, errno = 0, status = 0x0
[New LWP 30070]
[New LWP 30071]
[New LWP 30072]
Program received signal SIGTERM, Terminated.
0xffffe430 in __kernel_vsyscall ()
(gdb) bt
#0 0xffffe430 in __kernel_vsyscall ()
#1 0xf7eabc26 in kill () from /lib/libc.so.6
#2 0x0806cf82 in os_dump_core () at arch/um/os-Linux/util.c:105
#3 0x0805d64d in fatal_sigsegv () at arch/um/kernel/trap.c:141
#4 0x0806e32b in wait_stub_done (pid=30073)
at arch/um/os-Linux/skas/process.c:94
#5 0x0806d94b in run_syscall_stub (mm_idp=0xb26ff18, syscall=123,
args=0xb067e08, expected=0, addr=0xb067ea4, done=1)
at arch/um/os-Linux/skas/mem.c:86
#6 0x0806f997 in write_ldt_entry (mm_idp=0xb26ff18, func=1, desc=0xb067e94,
addr=0xb067ea4, done=1) at arch/um/sys-i386/ldt.c:72
#7 0x08070434 in init_new_ldt (new_mm=0xb26ff18, from_mm=0x0)
at arch/um/sys-i386/ldt.c:425
#8 0x0805de43 in init_new_context (task=0xb05bc00, mm=0xb26fdc0)
at arch/um/kernel/skas/mmu.c:87
#9 0x080ce3c1 in bprm_mm_init (bprm=0xb1a6980) at fs/exec.c:337
#10 0x080cfa2d in do_execve (filename=0x820d61f "/sbin/init", argv=0x8250020,
envp=0x8250240, regs=0xb05be04) at fs/exec.c:1296
#11 0x080599e8 in execve1 (file=0x820d61f "/sbin/init", argv=0x8250020,
env=0x8250240) at arch/um/kernel/exec.c:62
#12 0x08059a4f in um_execve (file=0x820d61f "/sbin/init", argv=0x8250020,
env=0x8250240) at arch/um/kernel/exec.c:78
#13 0x0805c4fb in kernel_execve (filename=0x820d61f "/sbin/init",
---Type <return> to continue, or q <return> to quit---
argv=0x8250020, envp=0x8250240) at arch/um/kernel/syscall.c:146
#14 0x08059616 in run_init_process (init_filename=0x820d61f "/sbin/init")
at init/main.c:763
#15 0x080596d3 in init_post () at init/main.c:809
#16 0x08049a74 in kernel_init (unused=0x0) at init/main.c:865
#17 0x0806ac31 in run_kernel_thread (fn=0x8049a00 <kernel_init>, arg=0x0,
jmp_ptr=0xb05be70) at arch/um/os-Linux/process.c:267
#18 0x0805ad62 in new_thread_handler () at arch/um/kernel/process.c:153
#19 0x00000000 in ?? ()
(gdb)

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