Messages in this thread | | | Date | Fri, 15 May 2015 07:57:39 -0700 | From | Dave Hansen <> | Subject | Re: [PATCHv5 03/28] memcg: adjust to support new THP refcounting |
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On 05/15/2015 04:18 AM, Kirill A. Shutemov wrote: >> > But same question about whether it should be using hpage_nr_pages() instead >> > of a constant. > No. Compiler woundn't be able to optimize HPAGE_PMD_NR away for THP=n, > since compound value cross compilation unit barrier.
What code are you talking about here, specifically? This?
static inline int hpage_nr_pages(struct page *page) { if (unlikely(PageTransHuge(page))) return HPAGE_PMD_NR; return 1; }
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