Re: use memcpy_mcsafe() for copy_to_iter() (was: Re: [PATCH v3 0/9] Series short description)

[Andy Lutomirski]

> On May 14, 2018, at 8:52 AM, Dan Williams <dan.j.williams@xxxxxxxxx> wrote:
> 

> 
> I think "happy" is a strong word when it comes to x86 machine check
> handling. My interpretation is that he and Andy acquiesced that this
> is about the best we can do with dax+mce as things stand today.


Agreed. I think itâs plausible that we could do slightly better for MCEs related to bad memory accessed through the direct map, but the code would be complicated and miserable to test, and itâs not even clear that it would materially decrease the chance that we survive as compared to these patches.