diff options
| author | David Stevens <stevensd@chromium.org> | 2023-01-13 11:30:11 +0900 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-02-02 22:33:13 -0800 |
| commit | 2cf1338454a8a9a0b3c1271ccb521afa2d6ae241 (patch) | |
| tree | 1fa315c5c83d181efda307004e7fae64270ac4ca /mm/shmem.c | |
| parent | 2973d8229b78d3f148e0c45916a1e8b237dc6167 (diff) | |
| download | linux-2cf1338454a8a9a0b3c1271ccb521afa2d6ae241.tar.gz | |
mm: fix khugepaged with shmem_enabled=advise
Pass vm_flags as a parameter to shmem_is_huge, rather than reading the
flags from the vm_area_struct in question. This allows the updated flags
from hugepage_madvise to be passed to the check, which is necessary
because madvise does not update the vm_area_struct's flags until after
hugepage_madvise returns.
This fixes an issue when shmem_enabled=madvise, where MADV_HUGEPAGE on
shmem was not able to register the mm_struct with khugepaged. Prior to
cd89fb065099, the mm_struct was registered by MADV_HUGEPAGE regardless of
the value of shmem_enabled (which was only checked when scanning vmas).
Link: https://lkml.kernel.org/r/20230113023011.1784015-1-stevensd@google.com
Fixes: cd89fb065099 ("mm,thp,shmem: make khugepaged obey tmpfs mount flags")
Signed-off-by: David Stevens <stevensd@chromium.org>
Cc: David Stevens <stevensd@chromium.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: Rik van Riel <riel@surriel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/shmem.c')
| -rw-r--r-- | mm/shmem.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/mm/shmem.c b/mm/shmem.c index c5048c6c83ddf9..9e1015cbad29f9 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -468,15 +468,14 @@ static bool shmem_confirm_swap(struct address_space *mapping, static int shmem_huge __read_mostly = SHMEM_HUGE_NEVER; -bool shmem_is_huge(struct vm_area_struct *vma, struct inode *inode, - pgoff_t index, bool shmem_huge_force) +bool shmem_is_huge(struct inode *inode, pgoff_t index, bool shmem_huge_force, + struct mm_struct *mm, unsigned long vm_flags) { loff_t i_size; if (!S_ISREG(inode->i_mode)) return false; - if (vma && ((vma->vm_flags & VM_NOHUGEPAGE) || - test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags))) + if (mm && ((vm_flags & VM_NOHUGEPAGE) || test_bit(MMF_DISABLE_THP, &mm->flags))) return false; if (shmem_huge == SHMEM_HUGE_DENY) return false; @@ -493,7 +492,7 @@ bool shmem_is_huge(struct vm_area_struct *vma, struct inode *inode, return true; fallthrough; case SHMEM_HUGE_ADVISE: - if (vma && (vma->vm_flags & VM_HUGEPAGE)) + if (mm && (vm_flags & VM_HUGEPAGE)) return true; fallthrough; default: @@ -676,8 +675,8 @@ static long shmem_unused_huge_count(struct super_block *sb, #define shmem_huge SHMEM_HUGE_DENY -bool shmem_is_huge(struct vm_area_struct *vma, struct inode *inode, - pgoff_t index, bool shmem_huge_force) +bool shmem_is_huge(struct inode *inode, pgoff_t index, bool shmem_huge_force, + struct mm_struct *mm, unsigned long vm_flags) { return false; } @@ -1068,7 +1067,7 @@ static int shmem_getattr(struct user_namespace *mnt_userns, STATX_ATTR_NODUMP); generic_fillattr(&init_user_ns, inode, stat); - if (shmem_is_huge(NULL, inode, 0, false)) + if (shmem_is_huge(inode, 0, false, NULL, 0)) stat->blksize = HPAGE_PMD_SIZE; if (request_mask & STATX_BTIME) { @@ -1926,7 +1925,8 @@ repeat: return 0; } - if (!shmem_is_huge(vma, inode, index, false)) + if (!shmem_is_huge(inode, index, false, + vma ? vma->vm_mm : NULL, vma ? vma->vm_flags : 0)) goto alloc_nohuge; huge_gfp = vma_thp_gfp_mask(vma); |