On Sun, Aug 14, 2022 at 3:51 PM Kirill A. Shutemov <kirill@xxxxxxxxxxxxx> wrote:
>
> Do we gain enough benefit from the microoptimization to justify existing
> load_unaligned_zeropad()? The helper has rather confusing side-effects.
It's a *big* deal in pathname handling, yes. Doing things a byte at a
time is very noticeably slower.
If TDX has problems with it, then TDX needs to be fixed. And it's
simple enough - just make sure you have a guard page between any
kernel RAM mapping and whatever odd crazy page.
There is nothing subtle about this at all. You probably would want
that guard page *anyway*.
That "uaccepted memory" type needs to be just clearly fixed.
Linus
