Re: s390 && user_enable_single_step() (Was: odd utrace testing results on s390x)

Heiko Carstens
2010-01-06T14:59:14Z

On Tue, Jan 05, 2010 at 08:58:18PM +0100, Oleg Nesterov wrote:
> I decided to re-test this all with vanilla 2.6.33-rc2. It is really
> amazing how long it takes to recompile/install the kernel!

Then either you have a lot of steal time or an old machine (pre z10)?
You could also try to define more cpus if you have a virtual machine:
#cp define cpu <from>-<to>
...that is if your admin gave you permissions to do that.

> I spent
> the rest of this day fighting with this rhts machine. Result - it
> doesn't boot:
>
> 00: zIPL v1.8.2-5.el6 interactive boot menu
> 00:
> 00: 0. default (2.6.33-rc2)
> 00:
> 00: 1. 2.6.33-rc2
> 00: 2. 2.6.32.2-14.s390x.el6.s390x
> 00: 3. 2.6.32.2-14.el6.s390x
> 00: 4. linux
> 00:
> 00: Note: VM users please use '#cp vi vmsg '
> 00:
> 00: Please choose (default will boot in 15 seconds):
> 00: Booting default (2.6.33-rc2)...
> Ý<000000000011c4fc>¨ sysc_return+0x0/0x8
> Ý<00000000003cc0c6>¨ selinux_sb_copy_data+0x17e/0x238
> (Ý<00000000003cbf94>¨ selinux_sb_copy_data+0x4c/0x238)
> Ý<00000000003b62a6>¨ security_sb_copy_data+0x4e/0x60
> Ý<0000000000280338>¨ vfs_kern_mount+0x19c/0x1f4
> Ý<00000000002803de>¨ kern_mount_data+0x4e/0x5c
> Ý<0000000000ae1908>¨ devtmpfs_init+0x60/0xbc
> Ý<0000000000ae1818>¨ driver_init+0x28/0x6c
> Ý<0000000000abe582>¨ kernel_init+0x32a/0x3d8
> Ý<000000000010b8c2>¨ kernel_thread_starter+0x6/0xc
> Ý<000000000010b8bc>¨ kernel_thread_starter+0x0/0xc
> INFO: lockdep is turned off.
> 00: HCPGIR450W CP entered; disabled wait PSW 00020001 80000000 00000000 00114BD4
>
> Cai, any chance you can help? Using /usr/bin/console I can't choose another
> kernel at the "00: Please choose (default will boot in 15 seconds):" stage,
> how can I do this???

You did enter something like
#cp vi vmsg 2
and not just '2'?