The patch titled
Subject: mm: mempolicy: intruduce a helper huge_nodemask()
has been added to the -mm tree. Its filename is
mm-mempolicy-intruduce-a-helper-huge_nodemask.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-mempolicy-intruduce-a-helper-huge_nodemask.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-mempolicy-intruduce-a-helper-huge_nodemask.patch
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------------------------------------------------------
From: Huang Shijie <shijie.huang@xxxxxxx>
Subject: mm: mempolicy: intruduce a helper huge_nodemask()
Introduce a new helper huge_nodemask(), we can use it to get the node
mask.
This idea of the function is from huge_zonelist().
Link: http://lkml.kernel.org/r/1479107259-2011-5-git-send-email-shijie.huang@xxxxxxx
Signed-off-by: Huang Shijie <shijie.huang@xxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Kirill A . Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Cc: Gerald Schaefer <gerald.schaefer@xxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Cc: Steve Capper <steve.capper@xxxxxxx>
Cc: Kaly Xin <kaly.xin@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mempolicy.h | 8 ++++++++
mm/mempolicy.c | 20 ++++++++++++++++++++
2 files changed, 28 insertions(+)
diff -puN include/linux/mempolicy.h~mm-mempolicy-intruduce-a-helper-huge_nodemask include/linux/mempolicy.h
--- a/include/linux/mempolicy.h~mm-mempolicy-intruduce-a-helper-huge_nodemask
+++ a/include/linux/mempolicy.h
@@ -145,6 +145,8 @@ extern void mpol_rebind_task(struct task
enum mpol_rebind_step step);
extern void mpol_rebind_mm(struct mm_struct *mm, nodemask_t *new);
+extern nodemask_t *huge_nodemask(struct vm_area_struct *vma,
+ unsigned long addr);
extern struct zonelist *huge_zonelist(struct vm_area_struct *vma,
unsigned long addr, gfp_t gfp_flags,
struct mempolicy **mpol, nodemask_t **nodemask);
@@ -261,6 +263,12 @@ static inline void mpol_rebind_mm(struct
{
}
+static inline nodemask_t *huge_nodemask(struct vm_area_struct *vma,
+ unsigned long addr)
+{
+ return NULL;
+}
+
static inline struct zonelist *huge_zonelist(struct vm_area_struct *vma,
unsigned long addr, gfp_t gfp_flags,
struct mempolicy **mpol, nodemask_t **nodemask)
diff -puN mm/mempolicy.c~mm-mempolicy-intruduce-a-helper-huge_nodemask mm/mempolicy.c
--- a/mm/mempolicy.c~mm-mempolicy-intruduce-a-helper-huge_nodemask
+++ a/mm/mempolicy.c
@@ -1800,6 +1800,26 @@ static inline unsigned interleave_nid(st
#ifdef CONFIG_HUGETLBFS
/*
+ * huge_nodemask(@vma, @addr)
+ * @vma: virtual memory area whose policy is sought
+ * @addr: address in @vma for shared policy lookup and interleave policy
+ *
+ * If the effective policy is BIND, returns a pointer to the mempolicy's
+ * @nodemask.
+ */
+nodemask_t *huge_nodemask(struct vm_area_struct *vma, unsigned long addr)
+{
+ nodemask_t *nodes_mask = NULL;
+ struct mempolicy *mpol = get_vma_policy(vma, addr);
+
+ if (mpol->mode == MPOL_BIND)
+ nodes_mask = &mpol->v.nodes;
+ mpol_cond_put(mpol);
+
+ return nodes_mask;
+}
+
+/*
* huge_zonelist(@vma, @addr, @gfp_flags, @mpol)
* @vma: virtual memory area whose policy is sought
* @addr: address in @vma for shared policy lookup and interleave policy
_
Patches currently in -mm which might be from shijie.huang@xxxxxxx are
mm-hugetlb-rename-some-allocation-functions.patch
mm-hugetlb-add-a-new-parameter-for-some-functions.patch
mm-hugetlb-change-the-return-type-for-alloc_fresh_gigantic_page.patch
mm-mempolicy-intruduce-a-helper-huge_nodemask.patch
mm-hugetlb-add-a-new-function-to-allocate-a-new-gigantic-page.patch
mm-hugetlb-support-gigantic-surplus-pages.patch
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