Arch Linux

edriv

Member

Registered: 2013-03-13

Posts: 13

Kernel stuck at boot

Hi all, on my newly installed arch system I'm experiecing the following:
Every 1 over 3 boots, the kernel hangs for about 2 minutes after the message "Decompressing Linux. Parsing ELF... done. Booting the kernel."
After that, the following appears:
"rcu_preempt detected stalls on CPU/tasks: {0} (detected by 1, t=18002 jiffies, g=-277, c=-278, q=17)"
Or similar messages (like {1 2 3} replacing {0} or with value q=11).
After a few seconds boot process continues normally.

I'm running kernel 4.1.6-1-ARCH.
I have found no relevant entries in the journal.

edriv

Member

Registered: 2013-03-13

Posts: 13

Re: Kernel stuck at boot

Now that I have found this: https://bugs.archlinux.org/task/26847 I'm going to check a few more things...
I'm not using wireless so the link above is not relevant.
Now I have found in syslog these lines:

ott 04 13:22:06 localhost kernel: INFO: rcu_preempt detected stalls on CPUs/tasks: { 1 2 3} (detected by 0, t=44801 jiffies, 
ott 04 13:22:06 localhost kernel: Task dump for CPU 1:
ott 04 13:22:06 localhost kernel: swapper/1       R  running task        0     0      1 0x00000000
ott 04 13:22:06 localhost kernel:  ffff88014fc8d100 ffff88014abefe78 ffffffff810f558b ffff88014abefe78
ott 04 13:22:06 localhost kernel:  ffffffff8102105e 0000000000000001 ffff88014abec000 ffff88014abefea8
ott 04 13:22:06 localhost kernel:  ffffffff810211a6 0000000000000000 b1a6247c1a4f1195 ffff88014abefeb8
ott 04 13:22:06 localhost kernel: Call Trace:
ott 04 13:22:06 localhost kernel:  [<ffffffff810f558b>] ? tick_broadcast_oneshot_control+0x7b/0x210
ott 04 13:22:06 localhost kernel:  [<ffffffff8102105e>] ? default_idle+0x1e/0xf0
ott 04 13:22:06 localhost kernel:  [<ffffffff810211a6>] ? amd_e400_idle+0x76/0x110
ott 04 13:22:06 localhost kernel:  [<ffffffff81021b1f>] ? arch_cpu_idle+0xf/0x20
ott 04 13:22:06 localhost kernel:  [<ffffffff810bcdce>] ? cpu_startup_entry+0x3ce/0x450
ott 04 13:22:06 localhost kernel:  [<ffffffff81050116>] ? start_secondary+0x196/0x1e0

cat /proc/cpuinfo (for one CPU):

processor	: 0
vendor_id	: AuthenticAMD
cpu family	: 16
model		: 5
model name	: AMD Phenom(tm) II P960 Quad-Core Processor
stepping	: 3
microcode	: 0x10000c8
cpu MHz		: 800.000
cache size	: 512 KB
physical id	: 0
siblings	: 4
core id		: 0
cpu cores	: 4
apicid		: 0
initial apicid	: 0
fpu		: yes
fpu_exception	: yes
cpuid level	: 5
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt nodeid_msr hw_pstate npt lbrv svm_lock nrip_save vmmcall
bugs		: tlb_mmatch apic_c1e fxsave_leak sysret_ss_attrs
bogomips	: 3592.80
TLB size	: 1024 4K pages
clflush size	: 64
cache_alignment	: 64
address sizes	: 48 bits physical, 48 bits virtual
power management: ts ttp tm stc 100mhzsteps hwpstate

Last edited by edriv (2015-10-04 12:34:19)