Messages in this thread | | | Date | Wed, 21 May 2014 14:45:47 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [RFC] x86_64: A real proposal for iret-less return to kernel |
| |
Adding Tony.
On 05/21/2014 02:43 PM, Borislav Petkov wrote: > On Thu, May 22, 2014 at 06:37:26AM +0900, Linus Torvalds wrote: >> Seriously. If an NMI is interrupted by an MCE, you might as well >> consider the machine dead. Don't worry about it. We may or may not >> recover, but it is *not* our problem. > > I certainly like this way of handling it. We can even issue a nice > banner saying something like "You're f*cked - go change hw." >
Actually, it would be a lot better to panic than deadlock (HA systems tend to have something in place to catch the panic and/or reboot). Any way we can see if the CPU is already holding that lock and panic in that case?
-hpa
| |