Messages in this thread | | | Subject | Re: 4.10-rc1: thinkpad x60: who ate my cpu? | From | Woody Suwalski <> | Date | Sun, 12 Feb 2017 20:35:13 -0500 |
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Pavel Machek wrote: > Hi! > >>> The kernel is 4.8.17 EOL, installed almost a month ago. >>> Platform ThinkPad x60, Intel(R) Core(TM) Duo CPU T2400 @ 1.83GHz >>> >>> In dmesg I see that it used to be when 2 CPUs were OK: >>> [690409.476107] PM: noirq suspend of devices complete after 79.914 msecs >>> [690409.476547] ACPI: Preparing to enter system sleep state S3 >>> [690409.780081] ACPI : EC: EC stopped >>> [690409.780083] PM: Saving platform NVS memory >>> [690409.780284] Disabling non-boot CPUs ... >>> [690409.805284] smpboot: CPU 1 is now offline >>> [690409.816464] ACPI: Low-level resume complete >>> [690409.816464] ACPI : EC: EC started >>> [690409.816464] PM: Restoring platform NVS memory >>> [690409.816464] Enabling non-boot CPUs ... >>> [690409.840574] x86: Booting SMP configuration: >>> [690409.840576] smpboot: Booting Node 0 Processor 1 APIC 0x1 >>> [690409.805271] Initializing CPU#1 >>> [690409.805271] Disabled fast string operations >>> [690409.888252] cache: parent cpu1 should not be sleeping >>> [690409.920185] CPU1 is up >>> [690409.922288] ACPI: Waking up from system sleep state S3 >>> >>> Then the CPU1 failed to start: >>> >>> [691329.776108] PM: noirq suspend of devices complete after 79.941 msecs >>> [691329.776550] ACPI: Preparing to enter system sleep state S3 >>> [691330.080081] ACPI : EC: EC stopped >>> [691330.080083] PM: Saving platform NVS memory >>> [691330.080284] Disabling non-boot CPUs ... >>> [691330.105303] smpboot: CPU 1 is now offline >>> [691330.116477] ACPI: Low-level resume complete >>> [691330.116477] ACPI : EC: EC started >>> [691330.116477] PM: Restoring platform NVS memory >>> [691330.116477] Enabling non-boot CPUs ... >>> [691330.140570] x86: Booting SMP configuration: >>> [691330.140572] smpboot: Booting Node 0 Processor 1 APIC 0x1 >>> [691340.140015] smpboot: do_boot_cpu failed(-1) to wakeup CPU#1 >>> [691340.164445] Error taking CPU1 up: -5 >>> [691340.166309] ACPI: Waking up from system sleep state S3 >>> >>> And now it is: >>> [692517.868523] ACPI: Preparing to enter system sleep state S3 >>> [692518.172074] ACPI : EC: EC stopped >>> [692518.172076] PM: Saving platform NVS memory >>> [692518.172269] Disabling non-boot CPUs ... >>> [692518.172269] ACPI: Low-level resume complete >>> [692518.172269] ACPI : EC: EC started >>> [692518.172269] PM: Restoring platform NVS memory >>> [692518.172269] ACPI: Waking up from system sleep state S3 >>> >>> Is there any test I could do on the CPU wakeup while in that state? >>> >> Is there a way to kick the offline-CPU into operation from /sys level? > echo 0 > /sys/devices/system/cpu/cpu1/online > > should work. And... good thinking :-). > > Pavel Did not work, echo 0 > /sys/devices/system/cpu/cpu1/online -su: echo: write error: Device or resource busy
However echo 1 > /sys/devices/system/cpu/cpu1/online did not return an error ( but still only CPU0 seen)
Interesting experiment: I have hibernated and then woke up - and still only CPU0. I was expecting that after the power cycle the hotplug will bring CPU1 up...
Woody
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