On Sun, 27 Dec 2020, Kirill A. Shutemov wrote: > > Here's the fixup I have so far. It doesn't blow up immediately, but please > take a closer look. Who knows what stupid mistake I did this time. :/ It's been running fine on x86_64 for a couple of hours (but of course my testing is deficient, in not detecting the case Linus spotted). But I just thought I'd try it on i386 (hadn't tried previous versions) and this has a new disappointment: crashes when booting, in the "check if the page fault is solved" in do_fault_around(). I imagine a highmem issue with kmap of the pte address, but I'm reporting now before looking into it further (but verified that current linux.git i386 boots up fine). Maybe easily fixed: but does suggest this needs exposure in linux-next. Hugh
