Re: how to make kernel do system dump ?

[Andi Kleen <ak@xxxxxxx>]

On Fri, Nov 03, 2000 at 09:37:40AM -0800, Matt D. Robinson wrote:
> BTW, Andi, did 2.4 change the scheduler now so that you don't have
> to get tasklist_lock to avoid having jobs scheduled underneath you
> (in a panic()/interrupt state)?

The current CPU cannot be rescheduled because panic is hanging in kernel
mode. The panic also sends a stop IPI to the other CPUs, but until the
IPI is processed there may be some scheduling. The IPI send function
smp_call_function was also fixed to never schedule (it previously took
a semaphore which sometimes could lead to the panic thread calling schedule)
So it should be ok now.


-Andi