On Thu, Jun 13, 2019 at 05:56:47AM +0800, Yang Shi wrote: > The later patch would make THP deferred split shrinker memcg aware, but > it needs page->mem_cgroup information in THP destructor, which is called > after mem_cgroup_uncharge() now. > > So, move mem_cgroup_uncharge() from __page_cache_release() to compound > page destructor, which is called by both THP and other compound pages > except HugeTLB. And call it in __put_single_page() for single order > page.
If I read the patch correctly, it will change behaviour for pages with NULL_COMPOUND_DTOR. Have you considered it? Are you sure it will not break anything? -- Kirill A. Shutemov
