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SubjectRe: [PATCH 6/6]suspend/resume SMP support
Hi!

> > > Using CPU hotplug to support suspend/resume SMP. Both S3 and S4 use
> > > disable/enable_nonboot_cpus API. The S4 part is based on Pavel's
> > > original S4 SMP patch.
> >
> > I tested it on 2x PII(?) 550MHz system. Suspend went ok, resume loaded
> > image from disk, but then I got
> >
> > Thawing cpus ....
> > Booting processor 1/0 eip 3000
> >
> > ...and very funny effect on keyboard leds. They started to blink
> > (panic-like), but with very wrong frequency. It looked like 2 cpus
> > doing panic blinks at once...
> Check if /sys/device/system/cpu/cpu1/online attribute works. If it
> works, then it's other issue. I only tested the patches in two HT based
> systems.

Ok, this is PIII system 550MHz system:

root@hobit:/home/pavel# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 7
model name : Pentium III (Katmai)
stepping : 3
cpu MHz : 551.309
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 mmx fxsr sse
bogomips : 1085.44

core id : 255
cpu cores : 1
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 7
model name : Pentium III (Katmai)
stepping : 3
cpu MHz : 551.309
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 mmx fxsr sse
bogomips : 1097.72

core id : 255
cpu cores : 1
root@hobit:/home/pavel#

Offlining CPU seems to work ok:

root@hobit:/sys/devices/system/cpu/cpu1# cat online
1
root@hobit:/sys/devices/system/cpu/cpu1# echo 0 > online
root@hobit:/sys/devices/system/cpu/cpu1# sync
root@hobit:/sys/devices/system/cpu/cpu1# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 7
model name : Pentium III (Katmai)
stepping : 3
cpu MHz : 551.309
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 mmx fxsr sse
bogomips : 1085.44
core id : 255
cpu cores : 1
root@hobit:/sys/devices/system/cpu/cpu1#

Putting cpu back online, I get:

Booting processor 1/0 eip 3000

on console, and mess in syslog. Seems like my cpu #1 panicked but cpu
#0 just keeps going?!

root@hobit:/sys/devices/system/cpu/cpu1# dmesg | tail -20
[<c02c758f>] vt_console_print+0x24f/0x260
[<c02c7340>] vt_console_print+0x0/0x260
[<c01247e7>] __call_console_drivers+0x57/0x60
[<c01248e0>] call_console_drivers+0x80/0x110
[<c0124d8e>] release_console_sem+0x4e/0xc0
[<c0124c12>] vprintk+0x192/0x240
[<c0528891>] preempt_schedule_irq+0x51/0x80
[<c02adeca>] acpi_processor_idle+0x0/0x265
[<c010325e>] need_resched+0x1f/0x21
[<c02adeca>] acpi_processor_idle+0x0/0x265
[<c0124a77>] printk+0x17/0x20
[<c010b583>] cpu_init+0x73/0x360
[<c0117bd6>] start_secondary+0x6/0x170
Code: d2 74 bd fc 8b 44 24 28 b9 0e 00 00 00 8b 74 24 14 01 c6 b8 0e
00 00 00 89 74 24 1c 8b 74 24 30 89 44 24 10 8b 7c 24 1c 83 c6 10 <f3>
a5 8b 74 24 24 8b 44 24 1c 89 4c 24 10 01 ee f7 d5 21 ee 89
<0>Kernel panic - not syncing: Attempted to kill the idle task!
Stuck ??
Inquiring remote APIC #0...
... APIC #0 ID: 00000000
... APIC #0 VERSION: 00040011
... APIC #0 SPIV: 000000ff
root@hobit:/sys/devices/system/cpu/cpu1# dmesg | tail -25
[<c011d001>] activate_task+0x1/0xa0
[<c011d128>] resched_task+0x68/0x90
[<c011d8ba>] try_to_wake_up+0x2aa/0x2f0
[<c025ed7a>] fbcon_cursor+0x19a/0x270
[<c02c4958>] hide_cursor+0x18/0x30
[<c02c758f>] vt_console_print+0x24f/0x260
[<c02c7340>] vt_console_print+0x0/0x260
[<c01247e7>] __call_console_drivers+0x57/0x60
[<c01248e0>] call_console_drivers+0x80/0x110
[<c0124d8e>] release_console_sem+0x4e/0xc0
[<c0124c12>] vprintk+0x192/0x240
[<c0528891>] preempt_schedule_irq+0x51/0x80
[<c02adeca>] acpi_processor_idle+0x0/0x265
[<c010325e>] need_resched+0x1f/0x21
[<c02adeca>] acpi_processor_idle+0x0/0x265
[<c0124a77>] printk+0x17/0x20
[<c010b583>] cpu_init+0x73/0x360
[<c0117bd6>] start_secondary+0x6/0x170
Code: d2 74 bd fc 8b 44 24 28 b9 0e 00 00 00 8b 74 24 14 01 c6 b8 0e
00 00 00 89 74 24 1c 8b 74 24 30 89 44 24 10 8b 7c 24 1c 83 c6 10 <f3>
a5 8b 74 24 24 8b 44 24 1c 89 4c 24 10 01 ee f7 d5 21 ee 89
<0>Kernel panic - not syncing: Attempted to kill the idle task!
Stuck ??
Inquiring remote APIC #0...
... APIC #0 ID: 00000000
... APIC #0 VERSION: 00040011
... APIC #0 SPIV: 000000ff
root@hobit:/sys/devices/system/cpu/cpu1#
Pavel
--
Boycott Kodak -- for their patent abuse against Java.
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