[uml-devel] Re: [PROBLEM] uml refuses to boot

[Blaisorblade <blaisorblade@yahoo.it>]

On Wednesday 25 January 2006 10:33, Pekka Enberg wrote:
> Hi,

> UML in 2.6.16-rc1-git4 fails to boot a Debian 3.0r2 image. The same
> image works boots properly with 2.6.15. Here's the error:

> penberg@haji ~/src/linux/2.6 $ ./linux
> ubd0=/home/penberg/virtualized/Debian-3.0r2.ext2
> 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 PROT_EXEC mmap in /tmp...OK
> UML running in TT mode

So, first thing, you're still running in TT mode.

FYI, you should probably enable CONFIG_MODE_SKAS - it now (since 2.6.13) works 
even on unpatched hosts, in SKAS0 mode (even if it's a bit slower than 
SKAS3).

The only reason TT mode is still in is that its code is useful for debugging 
and future extension (i.e. there's no SMP support in SKAS0/3 modes).

Please report whether problems arise even in SKAS0 mode.

> tracing thread pid = 32600
> Linux version 2.6.16-rc1-git4 (penberg@haji) (gcc version 3.3.6
> (Gentoo 3.3.6, ssp-3.3.6-1.0, pie-8.7.8)) #1 Wed Jan 25 11:07:25 EET
> 2006
> Built 1 zonelists
> Kernel command line: ubd0=/home/penberg/virtualized/Debian-3.0r2.ext2
> root=98:0 PID hash table entries: 256 (order: 8, 4096 bytes)
> Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
> Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
> Memory: 29388k available
> Mount-cache hash table entries: 512
> Checking for host processor cmov support...Yes
> Checking for host processor xmm support...No
> Checking that host ptys support output SIGIO...Yes
> Checking that host ptys support SIGIO on close...No, enabling workaround
> Checking for /dev/anon on the host...Not available (open failed with errno
> 2) Disabling 2.6 AIO in tt mode
> 2.6 host AIO support not used - falling back to I/O thread
> NET: Registered protocol family 16
> mconsole (version 2) initialized on /home/penberg/.uml/Z81xOu/mconsole
> ubd: Synchronous mode
> VFS: Disk quotas dquot_6.5.1
> Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
> io scheduler noop registered
> io scheduler anticipatory registered
> io scheduler deadline registered
> io scheduler cfq registered
> NET: Registered protocol family 2
> IP route cache hash table entries: 512 (order: -1, 2048 bytes)
> TCP established hash table entries: 2048 (order: 1, 8192 bytes)
> TCP bind hash table entries: 2048 (order: 1, 8192 bytes)
> TCP: Hash tables configured (established 2048 bind 2048)
> TCP reno registered
> TCP bic registered
> NET: Registered protocol family 1
> NET: Registered protocol family 17
> Initialized stdio console driver
> Console initialized on /dev/tty0
> Initializing software serial port version 1
>  ubda: unknown partition table
> VFS: Mounted root (ext2 filesystem) readonly.
> line_ioctl: tty0: ioctl KDSIGACCEPT called
> os_set_fd_async : failed to set O_ASYNC and O_NONBLOCK on fd # 6, errno = 9
> register_winch_irq - failed to register IRQ
> os_set_fd_async : failed to set O_ASYNC and O_NONBLOCK on fd # 6, errno = 9
> register_winch_irq - failed to register IRQ
> INIT: os_set_fd_async : failed to set O_ASYNC and O_NONBLOCK on fd #
> 6, errno = 9
> register_winch_irq - failed to register IRQ
> version 2.84 bootingos_set_fd_async : failed to set O_ASYNC and
> O_NONBLOCK on fd # 6, errno = 9
> register_winch_irq - failed to register IRQ
>
> Kernel panic - not syncing: read of switch_pipe failed, errno = 11
>
> EIP: 0073:[<400b6e17>] CPU: 0 Not tainted ESP: 007b:9fe4a090 EFLAGS:
> 00200282 Not tainted
> EAX: 00000271 EBX: 9fe4a25c ECX: 0000540e EDX: 9fe4a25c
> ESI: 00000000 EDI: 00000000 EBP: 9fe4a35c DS: 007b ES: 007b
> a0bc3b74:  [<a0021de7>] show_regs+0xdf/0xe1
> a0bc3ba0:  [<a0010521>] panic_exit+0x25/0x3f
> a0bc3bb0:  [<a0033393>] notifier_call_chain+0x1c/0x3c
> a0bc3bd0:  [<a0025bd2>] panic+0x4b/0xd3
> a0bc3be8:  [<a0010ca2>] switch_to_tt+0xc2/0x129
> a0bc3c1c:  [<a000d0c2>] _switch_to+0x39/0xbe
> a0bc3c50:  [<a015d319>] schedule+0x41f/0x4a0
> a0bc3cb8:  [<a000d163>] interrupt_end+0x1c/0x3a
> a0bc3cc8:  [<a0012167>] sig_handler_common_tt+0xd3/0x100
> a0bc3d04:  [<a001de03>] sig_handler+0x2f/0x3c
> a0bc3d1c:  [<ffffe420>] _etext+0x5fe9ea61/0x0
>
>  sleeping process 1392 got unexpected signal : 10

> remove_umid_dir - actually_do_remove failed with err = -2
> remove_umid_dir - actually_do_remove failed with err = -2

-- 
Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!".
Paolo Giarrusso, aka Blaisorblade (Skype ID "PaoloGiarrusso", ICQ 215621894)
http://www.user-mode-linux.org/~blaisorblade

	

	
		
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