Re: panic! panic! panic! sigh.. panic!

["Martin S. Weber" <Ephaeton%gmx.net@localhost>]

On Mon, Sep 22, 2008 at 09:37:27AM +0100, Matthias Scheler wrote:
> On Sun, Sep 21, 2008 at 01:59:40PM -0400, Martin S. Weber wrote:
> > I thought SSE(2) would not hurt as I thought it also enables the use
> > of SIMD Integer operations along with the MMX registers ...
> 
> Yes, and these require code to handle them.
> 
> The kernel doesn't save any of these registers on entry into the kernel
> (via an interrupt or system call) and doesn't restore them on exit. It
> also doesn't save and restore them on internal scheduling. If you
> compile the kernel with MMX or SSE<n> enabled the kernel will sooner
> or later globber some state and you get a panic.

thank you for the explanation. How are we (the phaeton'ish users) supposed
to know that? I didn't look but ... is this documented somewhere?

Thanks again..

-Martin