Message-Id: <E1JQ6bM-0005z4-Ac@pomaz-ex.szeredi.hu>
Date:	Fri, 15 Feb 2008 20:52:04 +0100
From:	Miklos Szeredi <miklos@...redi.hu>
To:	jdike@...toit.com
CC:	miklos@...redi.hu, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: Re: 2.6.24-mm1 bugs

> >  - 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
Copyright (C) 2007 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
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@...sk) (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)
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists