On Tue, May 1, 2018 at 8:22 PM Dan Williams <dan.j.willi...@intel.com> wrote:
> All that to say that having a typical RAM page covering poisoned pmem > would complicate the 'clear badblocks' implementation. Ugh, ok. I guess the good news is that your patches aren't so big, and don't really affect anything else. But can we at least take this to be the impetus for just getting rid of that disgusting unrolled memcpy? Ablout half of the lines in the patch set comes from that thing. Is anybody seriously going to use pmem with some in-order chip that can't even get something as simple as a memory copy loop right? "git blame" fingers Tony Luck, I think he may have been influenced by the fumes from Itanium. I have some dim memory of "rep movs doesn't work well for pmem", but does it *seriously* need unrolling to cacheline boundaries? And if it does, who designed it, and why is anybody using it? Linus