On 11/29/2013 02:31 AM, Meelis Roos wrote:
First I compared the configurations of working and nonworking machines
(there were 2 different machines from the same era with problem), then
did some conf bisecting and found that CONFIG_SUN_OPENPROMFS causes the
RED problem in 3.12-rc5 when compiled modular and module loaded. It did
not happen when it was compiled statically, or modular but module was
not loaded. Reduced minimalistic configuration that causes this on Ultra
5 is attached to this mail.
Is the problem unique to these 2 machines given this configuration, or is
the problem reproduceable on other machines using this configuration?
Tried it on Sun E3500 with the same minimal config modified to boot
there (scsi + console differences), did not trigger. I did get some
other warning with all the lockdep config enabled, will investigate them
separately.
Is the warning you received this one from your other email?
------------[ cut here ]------------
WARNING: CPU: 0 PID: 2826 at kernel/lockdep.c:3535 check_flags+0x7c/0x240()
DEBUG_LOCKS_WARN_ON(current->hardirqs_enabled)
Modules linked in: openpromfs
CPU: 0 PID: 2826 Comm: reboot Tainted: G W 3.12.0 #133
Call Trace:
[0000000000454b6c] warn_slowpath_common+0x4c/0x80
[0000000000454c4c] warn_slowpath_fmt+0x2c/0x40
[0000000000499e3c] check_flags+0x7c/0x240
[000000000049d000] lock_acquire+0x20/0x80
[000000000077afe8] _raw_spin_lock+0x28/0x40
[00000000005f8ef4] p1275_cmd_direct+0x14/0x60
[00000000005f8980] prom_reboot+0x20/0x40
[0000000000434c88] machine_restart+0x48/0x60
[000000000047d9cc] kernel_restart+0x4c/0x60
[000000000047db34] SyS_reboot+0x134/0x200
[00000000004060b4] linux_sparc_syscall32+0x34/0x40
---[ end trace 4759822ebc3658d5 ]---
possible reason: unannotated irqs-off.
irq event stamp: 3799
hardirqs last enabled at (3799): [<0000000000404b1c>] rtrap_xcall+0x18/0x20
hardirqs last disabled at (3797): [<0000000000459380>] __do_softirq+0x100/0x180
softirqs last enabled at (3798): [<00000000004593dc>] __do_softirq+0x15c/0x180
softirqs last disabled at (3791): [<000000000042b89c>] do_softirq+0x5c/0xa0
Regards,
Peter Hurley
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