Messages in this thread | | | Date | Fri, 25 Jun 2021 10:22:35 +0200 | From | Michal Hocko <> | Subject | Re: [PATCH v2 14/46] mm/memcg: Add folio_charge_cgroup() |
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On Thu 24-06-21 17:42:58, Matthew Wilcox wrote: > On Wed, Jun 23, 2021 at 10:15:20AM +0200, Christoph Hellwig wrote: > > On Tue, Jun 22, 2021 at 01:15:19PM +0100, Matthew Wilcox (Oracle) wrote: > > > mem_cgroup_charge() already assumed it was being passed a non-tail > > > page (and looking at the callers, that's true; it's called for freshly > > > allocated pages). The only real change here is that folio_nr_pages() > > > doesn't compile away like thp_nr_pages() does as folio support > > > is not conditional on transparent hugepage support. Reimplement > > > mem_cgroup_charge() as a wrapper around folio_charge_cgroup(). > > > > Maybe rename __mem_cgroup_charge to __folio_charge_cgroup as well? > > Oh, yeah, should have done that. Thanks.
I would stick with __mem_cgroup_charge here. Not that I would insist but the folio nature is quite obvious from the parameter already.
Btw. memcg_check_events doesn't really need the page argument. A nid should be sufficient and your earlier patch is already touching the softlimit code so maybe it would be worth changing this page -> folio -> page back and forth.
-- Michal Hocko SUSE Labs
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