I have just seen a crash at shutdown with 2.6.23-rc9 on an RS/6000
powerpc box (POWER3, 64-bit). It crashed immediately after printing
"Disabling non-boot CPUs", so I tried reverting 4047727e and that
fixed it. It's unfortunate that that commit added the
disable_nonboot_cpus for all architectures, when only x86[-64] needs
it. (At least it sounds like only x86[-64] needs it; the commit
message seems quite x86-centric.)
In case anyone on the linuxppc-dev list wants to chase this further,
the crash looks like this:
Disabling non-boot CPUs ...
cpu 0x1: Vector: 300 (Data Access) at [c00000003f923950]
pc: c00000000003bf98: .xics_set_cpu_priority+0x58/0x78
lr: c00000000003bff4: .xics_migrate_irqs_away+0x3c/0x20c
sp: c00000003f923bd0
msr: a000000000001032
dar: 4
dsisr: 42000000
current = 0xc0000000bfb6b060
paca = 0xc00000000071c600
pid = 2610, comm = kstopmachine
enter ? for help
[c00000003f923c40] c00000000003bff4 .xics_migrate_irqs_away+0x3c/0x20c
[c00000003f923d00] c000000000040d54 .pseries_cpu_disable+0x98/0xb4
[c00000003f923d80] c000000000028e4c .__cpu_disable+0x44/0x58
[c00000003f923df0] c00000000007e204 .take_cpu_down+0x34/0x60
[c00000003f923e70] c00000000008ba3c .do_stop+0x144/0x1e4
[c00000003f923f00] c00000000006fd74 .kthread+0x78/0xc4
[c00000003f923f90] c0000000000272a8 .kernel_thread+0x4c/0x68
I don't have time tonight or tomorrow to track this down further. I'm
taking the kids to the coast tommorow. :)
Paul.
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