Re: [PATCH v8 3/3] x86, mce: Add __mcsafe_copy()

[Tony Luck]

On Sat, Jan 9, 2016 at 9:57 AM, Andy Lutomirski <luto@xxxxxxxxxxxxxx> wrote:
> On Sat, Jan 9, 2016 at 9:48 AM, Tony Luck <tony.luck@xxxxxxxxx> wrote:
>> ERMS?
>
> It's the fast string extension, aka Enhanced REP MOV STOS.  On CPUs
> with that feature (and not disabled via MSR), plain ol' rep movs is
> the fastest way to copy bytes.  I think this includes all Intel CPUs
> from SNB onwards.

Ah ... very fast at copying .. but currently not machine check recoverable.

-Tony