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Date: Wed, 4 Nov 2015 11:29:51 +0900 From: Sergey Senozhatsky <sergey.senozhatsky.work@...il.com> To: Minchan Kim <minchan@...nel.org> Cc: Andrew Morton <akpm@...ux-foundation.org>, linux-kernel@...r.kernel.org, linux-mm@...ck.org, Michael Kerrisk <mtk.manpages@...il.com>, linux-api@...r.kernel.org, Hugh Dickins <hughd@...gle.com>, Johannes Weiner <hannes@...xchg.org>, Rik van Riel <riel@...hat.com>, Mel Gorman <mgorman@...e.de>, KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>, Jason Evans <je@...com>, Daniel Micay <danielmicay@...il.com>, "Kirill A. Shutemov" <kirill@...temov.name>, Shaohua Li <shli@...nel.org>, Michal Hocko <mhocko@...e.cz>, yalin.wang2010@...il.com, Sergey Senozhatsky <sergey.senozhatsky.work@...il.com> Subject: Re: [PATCH v2 01/13] mm: support madvise(MADV_FREE) On (11/04/15 10:25), Minchan Kim wrote: [..] > +static int madvise_free_pte_range(pmd_t *pmd, unsigned long addr, > + unsigned long end, struct mm_walk *walk) > + > +{ > + struct mmu_gather *tlb = walk->private; > + struct mm_struct *mm = tlb->mm; > + struct vm_area_struct *vma = walk->vma; > + spinlock_t *ptl; > + pte_t *pte, ptent; > + struct page *page; I'll just ask (probably I'm missing something) + pmd_trans_huge_lock() ? > + split_huge_page_pmd(vma, addr, pmd); > + if (pmd_trans_unstable(pmd)) > + return 0; > + > + pte = pte_offset_map_lock(mm, pmd, addr, &ptl); > + arch_enter_lazy_mmu_mode(); > + for (; addr != end; pte++, addr += PAGE_SIZE) { > + ptent = *pte; > + > + if (!pte_present(ptent)) > + continue; > + > + page = vm_normal_page(vma, addr, ptent); > + if (!page) > + continue; > + -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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