Red Hat Bugzilla – Bug 1290983
Kernel only wakes 1 CPU Core, the other remain sleeping!
Last modified: 2016-07-19 14:35:50 EDT
Aa far as I remember, I am getting the above (Summary) error message when I boot up my machine. This time I wanted to capture the output and report it here as an "error". Is there any reason why I am receiving this and does it have any negative effects on normal operation ?
[ 3.338039] Failed to find cpu0 device node
However, it would be nice to have this one solved properly. My System is a LENOVO 12972UG/12972UG with E-450 APU. If you need more information, please let me know.
Linux localhost.localdomain 4.2.7-200.fc22.i686 #1 SMP Thu Dec 10 04:02:32 UTC 2015 i686 i686 i386 GNU/Linux
I wanted to come back to this issue here.
Every now and then I encounter heavy "sluggishness" of the behaviour of my notebook and today this happened again.
After some investgation I figured out that the Linux Kernel isn't able to wake up both CPUs correctly.
The E-450 CPU from AMD is a dual core cpu running 2 cores at 1.66ghz each. The whole day it seems that my system only ran on one core because the other one couldn't be woken up.
After some log investgation as well as running nmon shows only one core running.
I would consider this quite *critical* now.
Please have a look at the attachments
Created attachment 1119912 [details]
Created attachment 1119913 [details]
The journal was grepped for "cpu" and this is the output. As I was able to figure out, the CPU cores got initialized correctly on the 29th and 30rd of january. Today 31rd of january, Linux only woke up one core - presenting me with total sluggishness.
Expected solution would be that Linux wakes up all cores correctly (or none). But not half of it.
Jan 29 09:51:20 localhost.localdomain kernel: Initializing CPU#1
Jan 29 09:51:20 localhost.localdomain kernel: x86: Booted up 1 node, 2 CPUs
> core woke up correctly
Jan 30 10:54:41 localhost.localdomain kernel: Initializing CPU#1
Jan 30 10:54:41 localhost.localdomain kernel: x86: Booted up 1 node, 2 CPUs
> core woke up correctly
Jan 31 09:53:33 localhost.localdomain kernel: smpboot: do_boot_cpu failed(-1) to wakeup CPU#1
Jan 31 09:53:33 localhost.localdomain kernel: x86: Booted up 1 node, 1 CPUs
> core failed!
Fedora 22 changed to end-of-life (EOL) status on 2016-07-19. Fedora 22 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.
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