Re: [patch] Real-Time Preemption, -RT-2.6.13-rc4-V0.7.52-01

[Ingo Molnar]

* Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:

> In my custom kernel, I have a wchan field of the task that records 
> where the task calls something that might schedule. This way I can see 
> where things locked up if I don't have a back trace of the task.  This 
> field is always zero when it switches to usermode.  Something like 
> this can also be used to check how long the process is in kernel mode.  
> If a task is in the kernel for more than 10 seconds without sleeping, 
> that would definitely be a good indication of something wrong.  I 
> probably could write something to check for this if people are 
> interested.  I wont waste my time if nobody would want it.

this would be a pretty useful extension of the softlockup checker!

	Ingo
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