Re: [uml-devel] virtual time line

[Jeff D. <jd...@ka...>]

ko...@it... said:
> I understood ptracing in tt mode, but not completely in skas mode. How
> is ptracing different in skas mode ?

In skas mode, there are two threads, one which runs the kernel and one which
runs userspace.  The kernel thread ptraces the userspace thread, intercepting
and nullifying system calls and interrupts.

It reads the system call or signal information from the userspace thread
and acts on it in whatever way is appropriate, calling the system call, IRQ,
or passing the signal along to the process inside UML.

				Jeff