ksoftirqd and X 100% cpu utilization

Running 11.1-RC1, kernel is 2.6.27.7-6-pae. Several times now, I’ve seen ksoftirqd eat a CPU and now I’m seeing X reported as pegging the second core as well. This is on a Sager NP5797 laptop with an Intel Core 2 dual core cpu.

top shows:
top - 23:26:12 up 1:38, 1 user, load average: 2.01, 2.12, 2.29
Tasks: 159 total, 4 running, 155 sleeping, 0 stopped, 0 zombie
Cpu0 : 0.0%us, 6.0%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.3%hi, 93.7%si, 0.0%st
Cpu1 : 17.9%us, 82.1%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 4088560k total, 2826020k used, 1262540k free, 50128k buffers
Swap: 8385888k total, 0k used, 8385888k free, 2295916k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
4 root 15 -5 0 0 0 R 99 0.0 69:47.64 ksoftirqd/0
2620 root 20 0 920m 70m 8664 R 97 1.8 65:07.67 X

Any idea what’s causing this? Once it starts, the only was to stop it is to restart the system.

Look at their announcement about GM release :slight_smile:
They had to repack everything, i’m not sure because i have 64 bit version but for example i have no more higher version of kernel which was earlier on. They took them off the server because of all the problems (no kernel source because of that etc. )
I recommend downgrading kernel?

Has there been any progress with this issue? I’ve seen this issue with every kernel since I installed 11.1-RC1. Looking through my install logs, I see the following that have been run on my system:

2.6.27.7-4.1
2.6.27.7-4.4
2.6.27.7-6.1
2.6.27.8-1.1

I’m running the PAE kernels on a laptop with an Intel P9500 cpu, Intel PM45 + ICH9M chipset, 4GB RAM, Realtek GigE, Intel 5300 wireless and a nVidia 9800M GTX.

The amount of time it takes for ksoftirqd to start chewing up 100% of one of the two cpu cores varies. Sometimes it’s within a few minutes and others, it can take hours. Once it starts, though, the only way to make it stop is to reboot.

Hi
It seems like a newest clevo notebook :slight_smile: I have nearly the same.
I posted a BUG about this:
https://bugzilla.novell.com/show_bug.cgi?id=465039

I finally get the proper working by using the newest kernel (just DL and make). There were lotsa changes in the 2.6.28 release concerning softirq.

Regards.