On 8/5/21 9:02 PM, Zi Yan wrote: > From: Zi Yan <ziy@xxxxxxxxxx> > Patch 3 restores the pfn_valid_within() check when buddy allocator can merge > pages across memory sections. The check was removed when ARM64 gets rid of holes > in zones, but holes can appear in zones again after this patchset. To me that's most unwelcome resurrection. I kinda missed it was going away and now I can't even rejoice? I assume the systems that will be bumping max_order have a lot of memory. Are they going to have many holes? What if we just sacrificed the memory that would have a hole and don't add it to buddy at all?
