Re: VM86 interrupt emulation breakage and FIXes for 2.6.x kernel series

Linus Torvalds
2004-12-11T01:23:18Z

On Fri, 10 Dec 2004, Alan Cox wrote:
>
> On Gwe, 2004-12-10 at 22:55, Linus Torvalds wrote:
> > On Fri, 10 Dec 2004, Alan Cox wrote:
> > The vm86 interrupt does not allow sharing. And it really _has_ to be
> > disabled until user mode has cleared the irq source, or you'll have a very
> > dead machine.
>
> Until the 10,000th event it actually seems to work rather happily
> without that change.

I suspect you never tried the level-triggered case.

In the level-triggered case, the 10,000 interrupts happen faster than
user-mode can even say "Whaaa?".

Linus