diff options
author | Naoya Horiguchi | 2017-09-08 16:11:12 -0700 |
---|---|---|
committer | Linus Torvalds | 2017-09-08 18:26:45 -0700 |
commit | e8db67eb0ded3797085f032c84b5d8248f412de3 (patch) | |
tree | 8c0d7a943ae3ba6075fc98e3d2c1d832edb3e338 | |
parent | c8633798497ce894c22ab083eb884c8294c537b2 (diff) |
mm: migrate: move_pages() supports thp migration
This patch enables thp migration for move_pages(2).
Link: http://lkml.kernel.org/r/20170717193955.20207-10-zi.yan@sent.com
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Zi Yan <zi.yan@cs.rutgers.edu>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: David Nellans <dnellans@nvidia.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Michal Hocko <mhocko@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r-- | mm/migrate.c | 45 |
1 files changed, 32 insertions, 13 deletions
diff --git a/mm/migrate.c b/mm/migrate.c index bf5366a2176b..1088cef6ef8b 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -185,8 +185,8 @@ void putback_movable_pages(struct list_head *l) unlock_page(page); put_page(page); } else { - dec_node_page_state(page, NR_ISOLATED_ANON + - page_is_file_cache(page)); + mod_node_page_state(page_pgdat(page), NR_ISOLATED_ANON + + page_is_file_cache(page), -hpage_nr_pages(page)); putback_lru_page(page); } } @@ -1146,8 +1146,8 @@ out: * as __PageMovable */ if (likely(!__PageMovable(page))) - dec_node_page_state(page, NR_ISOLATED_ANON + - page_is_file_cache(page)); + mod_node_page_state(page_pgdat(page), NR_ISOLATED_ANON + + page_is_file_cache(page), -hpage_nr_pages(page)); } /* @@ -1421,7 +1421,17 @@ static struct page *new_page_node(struct page *p, unsigned long private, if (PageHuge(p)) return alloc_huge_page_node(page_hstate(compound_head(p)), pm->node); - else + else if (thp_migration_supported() && PageTransHuge(p)) { + struct page *thp; + + thp = alloc_pages_node(pm->node, + (GFP_TRANSHUGE | __GFP_THISNODE) & ~__GFP_RECLAIM, + HPAGE_PMD_ORDER); + if (!thp) + return NULL; + prep_transhuge_page(thp); + return thp; + } else return __alloc_pages_node(pm->node, GFP_HIGHUSER_MOVABLE | __GFP_THISNODE, 0); } @@ -1448,6 +1458,8 @@ static int do_move_page_to_node_array(struct mm_struct *mm, for (pp = pm; pp->node != MAX_NUMNODES; pp++) { struct vm_area_struct *vma; struct page *page; + struct page *head; + unsigned int follflags; err = -EFAULT; vma = find_vma(mm, pp->addr); @@ -1455,8 +1467,10 @@ static int do_move_page_to_node_array(struct mm_struct *mm, goto set_status; /* FOLL_DUMP to ignore special (like zero) pages */ - page = follow_page(vma, pp->addr, - FOLL_GET | FOLL_SPLIT | FOLL_DUMP); + follflags = FOLL_GET | FOLL_DUMP; + if (!thp_migration_supported()) + follflags |= FOLL_SPLIT; + page = follow_page(vma, pp->addr, follflags); err = PTR_ERR(page); if (IS_ERR(page)) @@ -1466,7 +1480,6 @@ static int do_move_page_to_node_array(struct mm_struct *mm, if (!page) goto set_status; - pp->page = page; err = page_to_nid(page); if (err == pp->node) @@ -1481,16 +1494,22 @@ static int do_move_page_to_node_array(struct mm_struct *mm, goto put_and_set; if (PageHuge(page)) { - if (PageHead(page)) + if (PageHead(page)) { isolate_huge_page(page, &pagelist); + err = 0; + pp->page = page; + } goto put_and_set; } - err = isolate_lru_page(page); + pp->page = compound_head(page); + head = compound_head(page); + err = isolate_lru_page(head); if (!err) { - list_add_tail(&page->lru, &pagelist); - inc_node_page_state(page, NR_ISOLATED_ANON + - page_is_file_cache(page)); + list_add_tail(&head->lru, &pagelist); + mod_node_page_state(page_pgdat(head), + NR_ISOLATED_ANON + page_is_file_cache(head), + hpage_nr_pages(head)); } put_and_set: /* |