Re: A comment about changing kernels

[Jonathan S. Shapiro]

On Tue, 2005-11-01 at 00:53 +0100, Bernhard Kauer wrote:
> > It really was a bug, and it has nothing to do with the IPC path,
> 
> That's correct, it was a bug in the interrupt handler.
> 
> 
> > The correct behavior was to save the segment selectors, and this adds
> > about 20 cycles to the path.
> 
> I do not see a problem, if the IPC set the segment registers to default
> values. See it as output values of this syscall.
> 
> Shortly spoken: a syscall can change every user register, an interrupt
> has to change none of them.

Yes. The problem is that this behavior was occurring on *interrupts*
too.

shap