From: Zi Yan <zi.yan@sent.com>
To: kirill.shutemov@linux.intel.com, linux-kernel@vger.kernel.org,
linux-mm@kvack.org
Cc: akpm@linux-foundation.org, minchan@kernel.org, vbabka@suse.cz,
mgorman@techsingularity.net, mhocko@kernel.org,
khandual@linux.vnet.ibm.com, zi.yan@cs.rutgers.edu,
dnellans@nvidia.com, dave.hansen@intel.com,
n-horiguchi@ah.jp.nec.com
Subject: [PATCH v8 01/10] mm: mempolicy: add queue_pages_required()
Date: Sat, 1 Jul 2017 09:39:59 -0400 [thread overview]
Message-ID: <20170701134008.110579-2-zi.yan@sent.com> (raw)
In-Reply-To: <20170701134008.110579-1-zi.yan@sent.com>
From: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Introduce a separate check routine related to MPOL_MF_INVERT flag.
This patch just does cleanup, no behavioral change.
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Zi Yan <zi.yan@cs.rutgers.edu>
---
mm/mempolicy.c | 22 +++++++++++++++++-----
1 file changed, 17 insertions(+), 5 deletions(-)
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index d911fa5cb2a7..58166bf1d1fd 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -412,6 +412,21 @@ struct queue_pages {
};
/*
+ * Check if the page's nid is in qp->nmask.
+ *
+ * If MPOL_MF_INVERT is set in qp->flags, check if the nid is
+ * in the invert of qp->nmask.
+ */
+static inline bool queue_pages_required(struct page *page,
+ struct queue_pages *qp)
+{
+ int nid = page_to_nid(page);
+ unsigned long flags = qp->flags;
+
+ return node_isset(nid, *qp->nmask) == !(flags & MPOL_MF_INVERT);
+}
+
+/*
* Scan through pages checking if pages follow certain conditions,
* and move them to the pagelist if they do.
*/
@@ -464,8 +479,7 @@ static int queue_pages_pte_range(pmd_t *pmd, unsigned long addr,
*/
if (PageReserved(page))
continue;
- nid = page_to_nid(page);
- if (node_isset(nid, *qp->nmask) == !!(flags & MPOL_MF_INVERT))
+ if (!queue_pages_required(page, qp))
continue;
if (PageTransCompound(page)) {
get_page(page);
@@ -497,7 +511,6 @@ static int queue_pages_hugetlb(pte_t *pte, unsigned long hmask,
#ifdef CONFIG_HUGETLB_PAGE
struct queue_pages *qp = walk->private;
unsigned long flags = qp->flags;
- int nid;
struct page *page;
spinlock_t *ptl;
pte_t entry;
@@ -507,8 +520,7 @@ static int queue_pages_hugetlb(pte_t *pte, unsigned long hmask,
if (!pte_present(entry))
goto unlock;
page = pte_page(entry);
- nid = page_to_nid(page);
- if (node_isset(nid, *qp->nmask) == !!(flags & MPOL_MF_INVERT))
+ if (!queue_pages_required(page, qp))
goto unlock;
/* With MPOL_MF_MOVE, we migrate only unshared hugepage. */
if (flags & (MPOL_MF_MOVE_ALL) ||
--
2.11.0
--
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next prev parent reply other threads:[~2017-07-01 13:40 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-01 13:39 [PATCH v8 00/10] mm: page migration enhancement for thp Zi Yan
2017-07-01 13:39 ` Zi Yan [this message]
2017-07-01 13:40 ` [PATCH v8 02/10] mm: x86: move _PAGE_SWP_SOFT_DIRTY from bit 7 to bit 1 Zi Yan
2017-07-01 13:40 ` [PATCH v8 03/10] mm: thp: introduce separate TTU flag for thp freezing Zi Yan
2017-07-01 13:40 ` [PATCH v8 04/10] mm: thp: introduce CONFIG_ARCH_ENABLE_THP_MIGRATION Zi Yan
2017-07-01 13:40 ` [PATCH v8 05/10] mm: thp: enable thp migration in generic path Zi Yan
2017-07-02 17:57 ` Kirill A. Shutemov
2017-07-03 1:26 ` Zi Yan
2017-07-11 6:47 ` Naoya Horiguchi
2017-07-11 14:00 ` Zi Yan
2017-07-13 9:30 ` Naoya Horiguchi
2017-07-13 11:28 ` Zi Yan
2017-07-14 0:06 ` Naoya Horiguchi
2017-07-01 13:40 ` [PATCH v8 06/10] mm: thp: check pmd migration entry in common path Zi Yan
2017-07-14 9:29 ` Naoya Horiguchi
2017-07-14 18:29 ` Zi Yan
2017-07-01 13:40 ` [PATCH v8 07/10] mm: soft-dirty: keep soft-dirty bits over thp migration Zi Yan
2017-07-01 13:40 ` [PATCH v8 08/10] mm: mempolicy: mbind and migrate_pages support " Zi Yan
2017-07-01 13:40 ` [PATCH v8 09/10] mm: migrate: move_pages() supports " Zi Yan
2017-07-01 13:40 ` [PATCH v8 10/10] mm: memory_hotplug: memory hotremove " Zi Yan
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