On Mon, 2012-02-06 at 09:51 +0100, Hector Palacios wrote:

On 02/03/2012 06:39 PM, Steven Rostedt wrote:

quoted

Note that you see that this causes a hang in the system if ksoftirqd is
a real time task.

This is true.

quoted

Not to mention, that ksoftirqd spins in an infinite
loop if the cable isn't connected (regardless of ksoftirqd's priority).

This is not true. The infinite loop is only hit when ksoftirqd is a real time task. I 
think you got confused by the different patches we tried. That dirty hack of yours 
with the workqueue was the one hanging with the cable disconnected. ;o)

I didn't say it was going to hang the box, I said it was going to spin.

With the cable disconnected, did you run top to see if ksoftirqd was
running at near 100%?  It wont lock up the box because ksoftirqd is not
a real time task in mainline.

-- Steve