Commit 74060e4d authored by Naoya Horiguchi's avatar Naoya Horiguchi Committed by Linus Torvalds
Browse files

mm: mbind: add hugepage migration code to mbind() 



Extend do_mbind() to handle vma with VM_HUGETLB set.  We will be able to
migrate hugepage with mbind(2) after applying the enablement patch which
comes later in this series.

Signed-off-by: default avatarNaoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: default avatarAndi Kleen <ak@linux.intel.com>
Reviewed-by: default avatarWanpeng Li <liwanp@linux.vnet.ibm.com>
Acked-by: default avatarHillf Danton <dhillf@gmail.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Hugh Dickins <hughd@google.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Rik van Riel <riel@redhat.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent e632a938

include/linux/hugetlb.h

+3 −0
Original line number Diff line number Diff line
@@ -265,6 +265,8 @@ struct huge_bootmem_page { 
};



struct page *alloc_huge_page_node(struct hstate *h, int nid);

struct page *alloc_huge_page_noerr(struct vm_area_struct *vma,

				unsigned long addr, int avoid_reserve);



/* arch callback */

int __init alloc_bootmem_huge_page(struct hstate *h);
@@ -378,6 +380,7 @@ static inline pgoff_t basepage_index(struct page *page) 
#else	/* CONFIG_HUGETLB_PAGE */

struct hstate {};

#define alloc_huge_page_node(h, nid) NULL

#define alloc_huge_page_noerr(v, a, r) NULL

#define alloc_bootmem_huge_page(h) NULL

#define hstate_file(f) NULL

#define hstate_sizelog(s) NULL

mm/hugetlb.c

+14 −0
Original line number Diff line number Diff line
@@ -1207,6 +1207,20 @@ static struct page *alloc_huge_page(struct vm_area_struct *vma, 
	return page;

}



/*

 * alloc_huge_page()'s wrapper which simply returns the page if allocation

 * succeeds, otherwise NULL. This function is called from new_vma_page(),

 * where no ERR_VALUE is expected to be returned.

 */

struct page *alloc_huge_page_noerr(struct vm_area_struct *vma,

				unsigned long addr, int avoid_reserve)

{

	struct page *page = alloc_huge_page(vma, addr, avoid_reserve);

	if (IS_ERR(page))

		page = NULL;

	return page;

}



int __weak alloc_bootmem_huge_page(struct hstate *h)

{

	struct huge_bootmem_page *m;

mm/mempolicy.c

+3 −1
Original line number Diff line number Diff line
@@ -1192,6 +1192,8 @@ static struct page *new_vma_page(struct page *page, unsigned long private, int * 
		vma = vma->vm_next;

	}



	if (PageHuge(page))

		return alloc_huge_page_noerr(vma, address, 1);

	/*

	 * if !vma, alloc_page_vma() will use task or system default policy

	 */
@@ -1302,7 +1304,7 @@ static long do_mbind(unsigned long start, unsigned long len, 
					(unsigned long)vma,

					MIGRATE_SYNC, MR_MEMPOLICY_MBIND);

			if (nr_failed)

				putback_lru_pages(&pagelist);

				putback_movable_pages(&pagelist);

		}



		if (nr_failed && (flags & MPOL_MF_STRICT))

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