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Date: Fri, 16 Sep 2022 14:09:57 -0700 From: Mike Kravetz <mike.kravetz@...cle.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: Xin Hao <xhao@...ux.alibaba.com>, songmuchun@...edance.com, linux-mm@...ck.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH V2] mm/hugetlb: add is_resv_equal_free() func On 09/16/22 13:12, Andrew Morton wrote: > On Fri, 16 Sep 2022 14:41:27 +0800 Xin Hao <xhao@...ux.alibaba.com> wrote: > > > In hugetlb.c file, there are several places to compare the values of > > 'h->free_huge_pages' and 'h->resv_huge_pages', it looks a bit messy, so > > there add a new is_resv_equal_free() func to do these. > > > > ... > > > > --- a/mm/hugetlb.c > > +++ b/mm/hugetlb.c > > @@ -1191,6 +1191,11 @@ static struct page *dequeue_huge_page_nodemask(struct hstate *h, gfp_t gfp_mask, > > return NULL; > > } > > > > +static inline bool is_resv_equal_free(struct hstate *h) > > I'm not sure that's a well chosen name. A better name would reflect > the *meaning* of free_huge_pages being equal to resv_huge_pages. Maybe > something like reserves_exhausted()? How about calling it free_non_reserved_huge_pages() and returning the actual value (h->free_huge_pages - h->resv_huge_pages)? Perhaps available_huge_pages()? It could then be used in at least one other place - if (h->free_huge_pages - h->resv_huge_pages > 0) > This would all be clearer if we'd bothered to document the fields of > struct hstate :( Agree, and discussed elsewhwere some may even be able to be eliminated. I can add that to my todo list. -- Mike Kravetz > > > > +{ > > + return (h->free_huge_pages - h->resv_huge_pages == 0) ? true : false; > > return h->free_huge_pages == h->resv_huge_pages; > > > +} >
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