Re: [coLinux-devel] [coLinux-users] Colinux 0.7.2 hangs on startup XP

[Paolo M. <pao...@gm...>]

>  Help for "CONFIG_PREEMPT_BKL" from kernel source:
>  "This option reduces the latency of the kernel by making the
>  big kernel lock preemptible."
>
>  This, I read, that a "big kernel lock" can be interupted. Right? And in
>  your case the PC hangs without accepting any interrupts (keyboard). A
>  simple "big kernel lock" is a simple disable all interrupts. Perhaps the
>   CONFIG_PREEMPT_BKL helps to not hang in such lock.
>
>  CONFIG_PREEMPT needs to have CONFIG_PREEMPT_BKL.

On a UNIPROCESSOR SYSTEM without PREEMPT , spinlocks don't exist.
The implementation is more clean.
So I think that configure a kernel without PREEMPT is a solution to
avoid deadlock.
This is what I think (if I understand correctly).

I have read now what is exactly the BIG KERNEL LOCK PREEMPTIBLE.
This is a good link.
http://kerneltrap.org/node/3843

Bye,
Paolo