From: zi.yan@sent.com
To: linux-kernel@vger.kernel.org, linux-mm@kvack.org
Cc: benh@kernel.crashing.org, mgorman@techsingularity.net,
kirill.shutemov@linux.intel.com, akpm@linux-foundation.org,
dave.hansen@linux.intel.com, n-horiguchi@ah.jp.nec.com
Subject: [PATCH v1 10/12] mm: migrate: move_pages() supports thp migration
Date: Mon, 26 Sep 2016 11:22:32 -0400 [thread overview]
Message-ID: <20160926152234.14809-11-zi.yan@sent.com> (raw)
In-Reply-To: <20160926152234.14809-1-zi.yan@sent.com>
From: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
This patch enables thp migration for move_pages(2).
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
---
mm/migrate.c | 24 +++++++++++++++++++++---
1 file changed, 21 insertions(+), 3 deletions(-)
diff --git a/mm/migrate.c b/mm/migrate.c
index dfca530..132e8db 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1417,7 +1417,17 @@ 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);
}
@@ -1444,6 +1454,7 @@ 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;
+ unsigned int follflags;
err = -EFAULT;
vma = find_vma(mm, pp->addr);
@@ -1451,8 +1462,10 @@ 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_SPLIT | FOLL_DUMP;
+ if (thp_migration_supported())
+ follflags &= ~FOLL_SPLIT;
+ page = follow_page(vma, pp->addr, follflags);
err = PTR_ERR(page);
if (IS_ERR(page))
@@ -1480,6 +1493,11 @@ static int do_move_page_to_node_array(struct mm_struct *mm,
if (PageHead(page))
isolate_huge_page(page, &pagelist);
goto put_and_set;
+ } else if (PageTransCompound(page)) {
+ if (PageTail(page)) {
+ err = pp->node;
+ goto put_and_set;
+ }
}
err = isolate_lru_page(page);
--
2.9.3
--
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next prev parent reply other threads:[~2016-09-26 15:24 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-26 15:22 [PATCH v1 00/12] mm: THP migration support zi.yan
2016-09-26 15:22 ` [PATCH v1 01/12] mm: mempolicy: add queue_pages_node_check() zi.yan
2016-09-26 15:22 ` [PATCH v1 02/12] mm: thp: introduce CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION zi.yan
2016-09-26 15:22 ` [PATCH v1 03/12] mm: thp: add helpers related to thp/pmd migration zi.yan
2016-09-26 15:22 ` [PATCH v1 04/12] mm: thp: enable thp migration in generic path zi.yan
2016-09-26 15:22 ` [PATCH v1 05/12] mm: thp: check pmd migration entry in common path zi.yan
2016-09-26 15:22 ` [PATCH v1 06/12] mm: soft-dirty: keep soft-dirty bits over thp migration zi.yan
2016-09-26 15:22 ` [PATCH v1 07/12] mm: hwpoison: fix race between unpoisoning and freeing migrate source page zi.yan
2016-09-26 15:22 ` [PATCH v1 08/12] mm: hwpoison: soft offline supports thp migration zi.yan
2016-09-26 15:22 ` [PATCH v1 09/12] mm: mempolicy: mbind and migrate_pages support " zi.yan
2016-09-26 15:22 ` zi.yan [this message]
2016-09-26 15:22 ` [PATCH v1 11/12] mm: memory_hotplug: memory hotremove supports " zi.yan
2016-09-26 15:22 ` [PATCH v1 12/12] mm: ppc64: Add THP migration support for ppc64 zi.yan
2016-09-30 0:02 ` Balbir Singh
2016-09-30 5:18 ` Aneesh Kumar K.V
2016-09-26 15:38 ` [PATCH v1 00/12] THP migration support Zi Yan
2016-09-29 8:25 ` Naoya Horiguchi
2016-09-30 2:32 ` Zi Yan
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