Re: [patch 1/2] x86_64 page fault NMI-safe

Andi Kleen
2010-07-15T22:58:50Z

> Why do we force IST use for NMI, btw? Maybe we shouldn't, and just use
> the normal kernel stack mechanisms?

If you don't use IST the SYSCALL entry is racy during the window
when RSP is not set up yet (same for MCE etc.)

-Andi
--
ak@linux.intel.com -- Speaking for myself only.