On Wed, 13 Apr 2022 22:47:45 +0800 Muchun Song <songmuchun@xxxxxxxxxxxxx> wrote: > If the size of "struct page" is not the power of two but with the feature > of minimizing overhead of struct page associated with each HugeTLB is > enabled, then the vmemmap pages of HugeTLB will be corrupted after > remapping (panic is about to happen in theory). But this only exists when > !CONFIG_MEMCG && !CONFIG_SLUB on x86_64. However, it is not a conventional > configuration nowadays. So it is not a real word issue, just the result > of a code review. The patch does add a whole bunch of tricky junk to address something which won't happen. How about we simply disable CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP if (!CONFIG_MEMCG && !CONFIG_SLUB)?
