INIT process FULL CPU load

[maurer]

Hi,

I'm running john927's fork v12 (latest) on my good old rt-n16 and experiencing 100% CPU load:

Mem: 74200K used, 52252K free, 0K shrd, 13912K buff, 23364K cached
CPU: 4% usr 93% sys 0% nic 0% idle 0% io 0% irq 2% sirq
Load average: 1.08 1.08 0.94 4/98 762
PID PPID USER STAT VSZ %VSZ %CPU COMMAND
1 0 mau R 2492 2% 99% /sbin/init noinitrd

mau@RT-N16:/tmp/home/root# cat /proc/1/status
Name: init
State: R (running)
SleepAVG: 0%
Tgid: 1
Pid: 1
PPid: 0
TracerPid: 0
Uid: 0 0 0 0
Gid: 0 0 0 0
FDSize: 32
Groups:
VmPeak: 2492 kB
VmSize: 2460 kB
VmLck: 0 kB
VmHWM: 1060 kB
VmRSS: 1060 kB
VmData: 628 kB
VmStk: 84 kB
VmExe: 900 kB
VmLib: 776 kB
VmPTE: 16 kB
Threads: 1
SigQ: 2/1023
SigPnd: 00000000000000000000000000000000
ShdPnd: 00000000000000000000000000006000
SigBlk: 0000000000000000000000000001e007
SigIgn: 00000000000000000000000000000000
SigCgt: 00000000000000000000000000061ab8
CapInh: 0000000000000000
CapPrm: 00000000ffffffff
CapEff: 00000000fffffeff

What i've done so far:
-reboot router;
-umount usb card;
-kill my vpn processes and any other consuming process;

But the load on init remained the same

Can someone help him track down this abnormal load on my system?

Thanks

 

[john9527]

What was the previous code on the router prior to loading V12?

Have you tried doing a factory reset and reconfiguring? (Don't load a saved configuration from the router gui)

 

[maurer]

i was hoping to avoid a factory default already performed when downgrading from merlin's 378.50 to v11.
I've reconfigured everything manually except NAT rules that i've applied by "nvram set" from previous version.

I will try again a factory default but to be honest - i don't like it :|

thanks for your reply !

 

[john9527]

If you came from V11, a factory reset shouldn't be necessary. Before you do that, can you login to the router and enter

env

 

[maurer]

USER=mau
TERMINFO=/opt/share/terminfo
HOME=/root
SSH_TTY=/dev/pts/0
PS1=\u@\h:\w\$
LOGNAME=mau
TEMP=/opt/tmp
TERM=xterm
PATH=/opt/usr/sbin:/opt/sbin:/opt/bin:/usr/local/sbin:/usr/sbin:/usr/bin:/sbin:/bin
TMP=/opt/tmp
SHELL=/bin/sh
PWD=/tmp/home/root
SSH_CONNECTION=10.1.1.147 49636 10.1.1.1 22

 

[john9527]

It looks like you have Entware/Optware/DM installed. Something may be corrupted there. Can you temporarily uninstall it and see if that resolves the problem?

 

[RMerlin]

strace -p 1

might provide some additional hints as what the init process is doing.

 

[john9527]

strace -p 1

might provide some additional hints as what the init process is doing.

I guess you need to install it through Entware/Optware for that (also tried other process ids)....

admin@AC68R-XXXXX:/tmp/home/root# strace -p 1
-sh: strace: not found

 

[RMerlin]

I guess you need to install it through Entware/Optware for that (also tried other process ids)....

admin@AC68R-XXXXX:/tmp/home/root# strace -p 1
-sh: strace: not found

Could be - I know it's in the source tree, but I couldn't remember if I was using that one, or installed through Entware. Should be trivial for the OP to install it since he's already setup for a repo, based on his path configuration.

 

[maurer]

mau@RT-N16:/tmp/home/root# strace -p 1
strace: attach: ptrace(PTRACE_ATTACH, ...): Operation not permitted

version from entware

anyway i've found the issue - after factory defaults and reconfiguration ...
the init was still at 100%

and the issue was...

rc_service=start_radvd

i've set rc_service= to empty and now is ok
as a conclusion ipv6 is broken for native type