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authorYang Shi <shy828301@gmail.com>2022-05-19 14:08:49 -0700
committerakpm <akpm@linux-foundation.org>2022-05-19 14:08:49 -0700
commit2647d11b9e71d495b2d4985ebaf7a734373a4b80 (patch)
tree05f39c775d7921913694dd78d9976a6aa256ffd8 /mm/khugepaged.c
parentd2081b2bf8195b8239c67fdd61518e077da7cbec (diff)
downloadlinux-2647d11b9e71d495b2d4985ebaf7a734373a4b80.tar.bz2
mm: khugepaged: make hugepage_vma_check() non-static
The hugepage_vma_check() could be reused by khugepaged_enter() and khugepaged_enter_vma_merge(), but it is static in khugepaged.c. Make it non-static and declare it in khugepaged.h. Link: https://lkml.kernel.org/r/20220510203222.24246-7-shy828301@gmail.com Signed-off-by: Yang Shi <shy828301@gmail.com> Suggested-by: Vlastimil Babka <vbabka@suse.cz> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Miaohe Lin <linmiaohe@huawei.com> Cc: Rik van Riel <riel@surriel.com> Cc: Song Liu <song@kernel.org> Cc: Song Liu <songliubraving@fb.com> Cc: Theodore Ts'o <tytso@mit.edu> Cc: Zi Yan <ziy@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/khugepaged.c')
-rw-r--r--mm/khugepaged.c25
1 files changed, 9 insertions, 16 deletions
diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index b43b294ca5f8..9ef626e2c750 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -437,8 +437,8 @@ static inline int khugepaged_test_exit(struct mm_struct *mm)
return atomic_read(&mm->mm_users) == 0;
}
-static bool hugepage_vma_check(struct vm_area_struct *vma,
- unsigned long vm_flags)
+bool hugepage_vma_check(struct vm_area_struct *vma,
+ unsigned long vm_flags)
{
if (!transhuge_vma_enabled(vma, vm_flags))
return false;
@@ -508,20 +508,13 @@ void __khugepaged_enter(struct mm_struct *mm)
void khugepaged_enter_vma_merge(struct vm_area_struct *vma,
unsigned long vm_flags)
{
- unsigned long hstart, hend;
-
- /*
- * khugepaged only supports read-only files for non-shmem files.
- * khugepaged does not yet work on special mappings. And
- * file-private shmem THP is not supported.
- */
- if (!hugepage_vma_check(vma, vm_flags))
- return;
-
- hstart = (vma->vm_start + ~HPAGE_PMD_MASK) & HPAGE_PMD_MASK;
- hend = vma->vm_end & HPAGE_PMD_MASK;
- if (hstart < hend)
- khugepaged_enter(vma, vm_flags);
+ if (!test_bit(MMF_VM_HUGEPAGE, &vma->vm_mm->flags) &&
+ khugepaged_enabled() &&
+ (((vma->vm_start + ~HPAGE_PMD_MASK) & HPAGE_PMD_MASK) <
+ (vma->vm_end & HPAGE_PMD_MASK))) {
+ if (hugepage_vma_check(vma, vm_flags))
+ __khugepaged_enter(vma->vm_mm);
+ }
}
void __khugepaged_exit(struct mm_struct *mm)