Thanks. I added stderr=1 to the kernel line and it gives me the
following:
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered (default)
Kernel panic - not syncing: Segfault with no mm
<6>Stopping all CPUs...done
EIP: 0073:[<a04271b1>] CPU: 0 Not tainted ESP: 007b:b7fa6fc0 EFLAGS:
00200246
Not tainted
EAX: 00000000 EBX: 00001788 ECX: 00000013 EDX: 00001788
ESI: 00001784 EDI: 00000000 EBP: 00000000 DS: 007b ES: 007b
a0d2b7b0: [<a005c884>] notifier_call_chain+0x1a/0x2d
a0d2b7cc: [<a004e124>] panic+0x54/0xd1
a0d2b7e4: [<a001bc07>] segv+0x10c/0x25c
a0d2b7fc: [<a00817e8>] kmem_cache_alloc+0x23/0x54
a0d2b87c: [<a001ba3d>] segv_handler+0x0/0xbe
a0d2b884: [<a001baf5>] segv_handler+0xb8/0xbe
a0d2b894: [<a04271b1>] kill+0x11/0x20
a0d2b8a8: [<a00406e0>] sig_handler_common_skas+0xbc/0xd5
a0d2b8cc: [<a003d5f1>] sig_handler+0x48/0x53
a0d2b91c: [<a00c1f88>] sysfs_create_group+0xf/0xa4
a0d2b964: [<a0047d47>] __activate_task+0x1d/0x27
a0d2b978: [<a0047eb5>] activate_task+0x8b/0x95
a0d2b99c: [<a0426eba>] __libc_longjmp+0x3a/0x60
a0d2b9bc: [<a003fdeb>] switch_threads+0x3b/0x4e
a0d2b9e0: [<a003fddd>] switch_threads+0x2d/0x4e
a0d2b9f0: [<a047b901>] schedule+0x4e5/0x50b
a0d2ba1c: [<a0047d47>] __activate_task+0x1d/0x27
a0d2ba20: [<a006cfb3>] free_pages_bulk+0x15/0x1d7
a0d2ba40: [<a006d19d>] free_one_page+0x28/0x2c
a0d2ba5c: [<a006d260>] __free_pages_ok+0xbf/0xd6
a0d2ba8c: [<a006dc86>] __free_pages+0x49/0x4c
a0d2ba98: [<a0080860>] kmem_freepages+0xa2/0xc4
a0d2baa8: [<a0081a50>] kmem_cache_free+0x51/0x58
a0d2bac4: [<a00816f1>] free_block+0x8f/0xcc
a0d2bae8: [<a003d50f>] set_signals+0x18/0x28
a0d2baf0: [<a0081812>] kmem_cache_alloc+0x4d/0x54
a0d2bb04: [<a009bb39>] alloc_inode+0x29/0x17f
a0d2bb08: [<a009bc07>] alloc_inode+0xf7/0x17f
a0d2bb20: [<a009c3fc>] new_inode+0xc/0x77
a0d2bb24: [<a009c40d>] new_inode+0x1d/0x77
a0d2bb28: [<a00aa2bb>] inotify_d_instantiate+0x3b/0x5d
a0d2bb30: [<a009ad94>] d_instantiate+0x62/0x94
a0d2bb48: [<a00bffb4>] sysfs_create+0x92/0xdc
a0d2bb64: [<a003d50f>] set_signals+0x18/0x28
a0d2bb6c: [<a0081812>] kmem_cache_alloc+0x4d/0x54
a0d2bb80: [<a00c0aff>] sysfs_new_dirent+0x17/0x62
a0d2bb98: [<a00c0bb4>] sysfs_make_dirent+0x18/0x70
a0d2bbd0: [<a000e1a4>] topology_add_dev+0x12/0x17
a0d2bbdc: [<a027f575>] topology_cpu_callback+0x21/0x34
a0d2bbe8: [<a000e1dd>] topology_sysfs_init+0x1d/0x41
a0d2bbfc: [<a0001679>] do_initcalls+0x50/0xf5
a0d2bc24: [<a0017180>] init+0x0/0x13c
a0d2bc34: [<a0017180>] init+0x0/0x13c
a0d2bc38: [<a00171ca>] init+0x4a/0x13c
a0d2bc50: [<a003cbfb>] run_kernel_thread+0x43/0x4d
a0d2bc64: [<a0017180>] init+0x0/0x13c
a0d2bc70: [<a003cbda>] run_kernel_thread+0x22/0x4d
a0d2bce8: [<a0048a2a>] schedule_tail+0x3b/0x12e
a0d2bcfc: [<a001e877>] new_thread_handler+0x7d/0xa5
a0d2bd00: [<a0017180>] init+0x0/0x13c
a0d2bd5c: [<a04271b1>] kill+0x11/0x20
My host kernel version is 2.6.14-kanotix-9 and I'm compiling the latest
version of kernel for UML (2.6.17-9). When I looked at
http://user-mode-linux.sourceforge.net/new/problems.html, it recommended
I turn off GPROF or upgrade to a newer version of kernel but:
a) grep -i GPROF .config for the UML kernel doesn't give me any output
b) grep -i GPROF on the config file for my host kernel also doesn't
give me any output
c) I'm using hte latest version of UML by using the latest stable
version of the kernel (2.6.17-9).
Any ideas? Thanks for your help.
On Sat, 19 Aug 2006 20:44:25 -0400, "Jeff Dike" <[EMAIL PROTECTED]>
said:
> On Sat, Aug 19, 2006 at 11:58:44AM -0700, Mathew Brown wrote:
> > 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 for tmpfs mount on /dev/shm...OK
> > Checking PROT_EXEC mmap in /dev/shm/...OK
> > Checking for the skas3 patch in the host:
> > - /proc/mm...not found
> > - PTRACE_FAULTINFO...not found
> > - PTRACE_LDT...not found
> > UML running in SKAS0 mode
> > Checking that ptrace can change system call numbers...OK
> > Checking syscall emulation patch for ptrace...OK
> > Checking advanced syscall emulation patch for ptrace...OK
> >
> > Any ideas? Thanks.
>
> Can you add "stderr=1" to the command line?
>
> Jeff
--
Mathew Brown
[EMAIL PROTECTED]
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