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Re: Debian dont bring up second CPU



Might not be helpful but I would check the openboot settings.

use .asr to see if anything has been disabled and/or printenv to see if any changes from default might be causing this.

http://shrubbery.net/~heas/sun-feh-2_1/General/OBP.html

-Mike
On Mar 11, 2018, at 8:50 PM, Harald Hellesø <harald.helleso@gmail.com> wrote:

Just installed Debian on my 220R. Its got 2x450mhz cpus and 2gb of ram. 
Diagnostic dont find any errors at all. But Debian only brings up CPU0 and not CPU1. 

Ive tried to force it with:  echo 1 | sudo tee /sys/devices/system/cpu/cpu1/online

But even if im root i dont have permission to edit the file

Ive tried chown and cmod without any positiv result. 

Ive switched around the cpu's to find out if any of them are bad. 

I also run Debian on my 420R and on that system all cpus are online

Here is what shows up during boot

[    2.518297] CPU CAPS: [flush,stbar,swap,muldiv,v9,mul32,div32,v8plus]
[    2.595378] CPU CAPS: [vis]
[    2.653582] percpu: Embedded 12 pages/cpu @        (ptrval) s54424 r8192 d35688 u2097152
[    2.755524] Built 1 zonelists, mobility grouping on.  Total pages: 259737
[    2.834999] Kernel command line: root=/dev/sda4 ro
[    2.909005] Dentry cache hash table entries: 262144 (order: 8, 2097152 bytes)
[    2.996591] Inode-cache hash table entries: 131072 (order: 7, 1048576 bytes)
[    3.079187] Sorting __ex_table...
[    3.225117] Memory: 2031440K/2096328K available (6476K kernel code, 779K rwdata, 1744K rodata, 560K init, 517K bss, 64888K reserved, 0K cma-reserved)
[    3.383838] random: get_random_u64 called from __kmem_cache_create+0x24/0x580 with crng_init=0
[    3.488400] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
[    3.565547] ftrace: allocating 22201 entries in 44 pages
[    3.699418] Hierarchical RCU implementation.
[    3.748741]  RCU restricting CPUs from NR_CPUS=256 to nr_cpu_ids=2.
[    3.823748] RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
[    3.922129] NR_IRQS: 2048, nr_irqs: 2048, preallocated irqs: 1
[    3.990420] clocksource: tick: mask: 0xffffffffffffffff max_cycles: 0x67c8d329f6, max_idle_ns: 440795203322 ns
[    4.109926] clocksource: mult[238e297] shift[24]
[    4.165138] clockevent: mult[73336543] shift[32]
[    4.220590] Console: colour dummy device 80x25
[    4.273546] console [tty0] enabled
[    4.314127] bootconsole [earlyprom0] disabled
[    4.446370] Calibrating delay using timer specific routine.. 902.64 BogoMIPS (lpj=1805295)
[    4.446411] pid_max: default: 32768 minimum: 301
[    4.446945] Security Framework initialized
[    4.446974] Yama: disabled by default; enable with sysctl kernel.yama.*
[    4.447106] AppArmor: AppArmor initialized
[    4.447390] Mount-cache hash table entries: 4096 (order: 2, 32768 bytes)
[    4.447501] Mountpoint-cache hash table entries: 4096 (order: 2, 32768 bytes)
[    4.450612] Hierarchical SRCU implementation.
[    4.452961] smp: Bringing up secondary CPUs ...
[    4.452994] smp: Brought up 1 node, 1 CPU
[    4.454072] devtmpfs: initialized
[    4.458587] Performance events: No support for PMU type 'ultra12'


 


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