The patch titled
Subject: thp: introduce hugepage_vma_check()
has been added to the -mm tree. Its filename is
thp-introduce-hugepage_vma_check.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
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------------------------------------------------------
From: Bob Liu <lliubbo@xxxxxxxxx>
Subject: thp: introduce hugepage_vma_check()
Multiple places do the same check.
Signed-off-by: Bob Liu <lliubbo@xxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxx>
Cc: Minchan Kim <minchan.kim@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/huge_memory.c | 38 +++++++++++++++++---------------------
1 file changed, 17 insertions(+), 21 deletions(-)
diff -puN mm/huge_memory.c~thp-introduce-hugepage_vma_check mm/huge_memory.c
--- a/mm/huge_memory.c~thp-introduce-hugepage_vma_check
+++ a/mm/huge_memory.c
@@ -1980,6 +1980,20 @@ static struct page
}
#endif
+static bool hugepage_vma_check(struct vm_area_struct *vma)
+{
+ if ((!(vma->vm_flags & VM_HUGEPAGE) && !khugepaged_always()) ||
+ (vma->vm_flags & VM_NOHUGEPAGE))
+ return false;
+
+ if (!vma->anon_vma || vma->vm_ops)
+ return false;
+ if (is_vma_temporary_stack(vma))
+ return false;
+ VM_BUG_ON(vma->vm_flags & VM_NO_THP);
+ return true;
+}
+
static void collapse_huge_page(struct mm_struct *mm,
unsigned long address,
struct page **hpage,
@@ -2020,17 +2034,8 @@ static void collapse_huge_page(struct mm
hend = vma->vm_end & HPAGE_PMD_MASK;
if (address < hstart || address + HPAGE_PMD_SIZE > hend)
goto out;
-
- if ((!(vma->vm_flags & VM_HUGEPAGE) && !khugepaged_always()) ||
- (vma->vm_flags & VM_NOHUGEPAGE))
+ if (!hugepage_vma_check(vma))
goto out;
-
- if (!vma->anon_vma || vma->vm_ops)
- goto out;
- if (is_vma_temporary_stack(vma))
- goto out;
- VM_BUG_ON(vma->vm_flags & VM_NO_THP);
-
pmd = hugepage_get_pmd(mm, address);
if (!pmd)
goto out;
@@ -2238,20 +2243,11 @@ static unsigned int khugepaged_scan_mm_s
progress++;
break;
}
-
- if ((!(vma->vm_flags & VM_HUGEPAGE) &&
- !khugepaged_always()) ||
- (vma->vm_flags & VM_NOHUGEPAGE)) {
- skip:
+ if (!hugepage_vma_check(vma)) {
+skip:
progress++;
continue;
}
- if (!vma->anon_vma || vma->vm_ops)
- goto skip;
- if (is_vma_temporary_stack(vma))
- goto skip;
- VM_BUG_ON(vma->vm_flags & VM_NO_THP);
-
hstart = (vma->vm_start + ~HPAGE_PMD_MASK) & HPAGE_PMD_MASK;
hend = vma->vm_end & HPAGE_PMD_MASK;
if (hstart >= hend)
_
Patches currently in -mm which might be from lliubbo@xxxxxxxxx are
linux-next.patch
thp-clean-up-__collapse_huge_page_isolate.patch
thp-introduce-hugepage_get_pmd.patch
thp-introduce-hugepage_vma_check.patch
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