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Date: Tue, 24 Nov 2015 13:29:41 +0900 From: Sergey Senozhatsky <sergey.senozhatsky.work@...il.com> To: Vladimir Davydov <vdavydov@...tuozzo.com> Cc: Andrew Morton <akpm@...ux-foundation.org>, "Kirill A. Shutemov" <kirill@...temov.name>, linux-mm@...ck.org, linux-kernel@...r.kernel.org, sergey.senozhatsky.work@...il.com Subject: Re: [PATCH -mm v2] mm: add page_check_address_transhuge helper Hello, On (11/20/15 12:31), Vladimir Davydov wrote: [..] > - if (ptep_clear_flush_young_notify(vma, address, pte)) { > - /* > - * Don't treat a reference through a sequentially read > - * mapping as such. If the page has been used in > - * another mapping, we will catch it; if this other > - * mapping is already gone, the unmap path will have > - * set PG_referenced or activated the page. > - */ > - if (likely(!(vma->vm_flags & VM_SEQ_READ))) > + if (pte) { > + if (ptep_clear_flush_young_notify(vma, address, pte)) { > + /* > + * Don't treat a reference through a sequentially read > + * mapping as such. If the page has been used in > + * another mapping, we will catch it; if this other > + * mapping is already gone, the unmap path will have > + * set PG_referenced or activated the page. > + */ > + if (likely(!(vma->vm_flags & VM_SEQ_READ))) > + referenced++; > + } > + pte_unmap(pte); > + } else { > + if (pmdp_clear_flush_young_notify(vma, address, pmd)) > referenced++; > } # CONFIG_TRANSPARENT_HUGEPAGE is not set x86_64, 4.4.0-rc2-mm1 mm/built-in.o: In function `page_referenced_one': rmap.c:(.text+0x32070): undefined reference to `pmdp_clear_flush_young' -ss -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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