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Date: Wed, 6 Jan 2010 15:59:08 +0100
From: Heiko Carstens <heiko.carstens@de.ibm.com>
Subject: Re: s390 && user_enable_single_step() (Was: odd utrace testing
 results on s390x)
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To: Oleg Nesterov <oleg@redhat.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>, Roland McGrath <roland@redhat.com>, caiqian@redhat.com, Jan Kratochvil <jkratoch@redhat.com>, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, utrace-devel@redhat.com
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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:
>=20
> 	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 <input>'
> 	00:
> 	00: Please choose (default will boot in 15 seconds):
> 	00: Booting default (2.6.33-rc2)...
> 	 =DD<000000000011c4fc>=A8 sysc_return+0x0/0x8
> 	 =DD<00000000003cc0c6>=A8 selinux_sb_copy_data+0x17e/0x238
> 	(=DD<00000000003cbf94>=A8 selinux_sb_copy_data+0x4c/0x238)
> 	 =DD<00000000003b62a6>=A8 security_sb_copy_data+0x4e/0x60
> 	 =DD<0000000000280338>=A8 vfs_kern_mount+0x19c/0x1f4
> 	 =DD<00000000002803de>=A8 kern_mount_data+0x4e/0x5c
> 	 =DD<0000000000ae1908>=A8 devtmpfs_init+0x60/0xbc
> 	 =DD<0000000000ae1818>=A8 driver_init+0x28/0x6c
> 	 =DD<0000000000abe582>=A8 kernel_init+0x32a/0x3d8
> 	 =DD<000000000010b8c2>=A8 kernel_thread_starter+0x6/0xc
> 	 =DD<000000000010b8bc>=A8 kernel_thread_starter+0x0/0xc
> 	INFO: lockdep is turned off.
> 	00: HCPGIR450W CP entered; disabled wait PSW 00020001 80000000 00000000 =
00114BD4
>=20
> Cai, any chance you can help? Using /usr/bin/console I can't choose anoth=
er
> kernel at the "00: Please choose (default will boot in 15 seconds):" stag=
e,
> how can I do this???

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