diff options
| author |   Yang Shi <shy828301@gmail.com> | 2022-06-16 10:48:35 -0700 |
|---|---|---|
| committer |   akpm <akpm@linux-foundation.org> | 2022-07-17 17:14:32 -0700 |
| commit | 4fa6893faeaaea4fe4440512d2a708527ef47051 (patch) | |
| tree | 7532fd0bfbd6e862925e539a2c7fad8cde5d8bb5 /mm/khugepaged.c | |
| parent | mm: khugepaged: check THP flag in hugepage_vma_check() (diff) | |
| download | linux-dev-4fa6893faeaaea4fe4440512d2a708527ef47051.tar.xz linux-dev-4fa6893faeaaea4fe4440512d2a708527ef47051.zip | |
mm: thp: consolidate vma size check to transhuge_vma_suitable
There are couple of places that check whether the vma size is ok for THP
or whether address fits, they are open coded and duplicate, use
transhuge_vma_suitable() to do the job by passing in (vma->end -
HPAGE_PMD_SIZE).
Move vma size check into hugepage_vma_check(). This will make
khugepaged_enter() is as same as khugepaged_enter_vma(). There is just
one caller for khugepaged_enter(), replace it to khugepaged_enter_vma()
and remove khugepaged_enter().
Link: https://lkml.kernel.org/r/20220616174840.1202070-3-shy828301@gmail.com
Signed-off-by: Yang Shi <shy828301@gmail.com>
Reviewed-by: Zach O'Keefe <zokeefe@google.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/khugepaged.c')
| -rw-r--r-- | mm/khugepaged.c | 19 |
1 files changed, 6 insertions, 13 deletions
diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 3eec970a884d..c7e22135f1b5 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -443,8 +443,8 @@ bool hugepage_vma_check(struct vm_area_struct *vma, if (vma_is_dax(vma)) return false; - if (vma->vm_file && !IS_ALIGNED((vma->vm_start >> PAGE_SHIFT) - - vma->vm_pgoff, HPAGE_PMD_NR)) + /* Check alignment for file vma and size for both file and anon vma */ + if (!transhuge_vma_suitable(vma, (vma->vm_end - HPAGE_PMD_SIZE))) return false; /* Enabled via shmem mount options or sysfs settings. */ @@ -505,9 +505,7 @@ void khugepaged_enter_vma(struct vm_area_struct *vma, unsigned long 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))) { + khugepaged_enabled()) { if (hugepage_vma_check(vma, vm_flags)) __khugepaged_enter(vma->vm_mm); } @@ -948,7 +946,6 @@ static int hugepage_vma_revalidate(struct mm_struct *mm, unsigned long address, struct vm_area_struct **vmap) { struct vm_area_struct *vma; - unsigned long hstart, hend; if (unlikely(khugepaged_test_exit(mm))) return SCAN_ANY_PROCESS; @@ -957,9 +954,7 @@ static int hugepage_vma_revalidate(struct mm_struct *mm, unsigned long address, if (!vma) return SCAN_VMA_NULL; - hstart = (vma->vm_start + ~HPAGE_PMD_MASK) & HPAGE_PMD_MASK; - hend = vma->vm_end & HPAGE_PMD_MASK; - if (address < hstart || address + HPAGE_PMD_SIZE > hend) + if (!transhuge_vma_suitable(vma, address)) return SCAN_ADDRESS_RANGE; if (!hugepage_vma_check(vma, vma->vm_flags)) return SCAN_VMA_CHECK; @@ -2135,10 +2130,8 @@ skip: progress++; continue; } - hstart = (vma->vm_start + ~HPAGE_PMD_MASK) & HPAGE_PMD_MASK; - hend = vma->vm_end & HPAGE_PMD_MASK; - if (hstart >= hend) - goto skip; + hstart = round_up(vma->vm_start, HPAGE_PMD_SIZE); + hend = round_down(vma->vm_end, HPAGE_PMD_SIZE); if (khugepaged_scan.address > hend) goto skip; if (khugepaged_scan.address < hstart) |