diff options
| -rw-r--r-- | include/linux/hugetlb.h | 6 | ||||
| -rw-r--r-- | mm/hugetlb.c | 13 | ||||
| -rw-r--r-- | mm/memory-failure.c | 2 | ||||
| -rw-r--r-- | mm/mempolicy.c | 2 | ||||
| -rw-r--r-- | mm/migrate.c | 7 |
5 files changed, 16 insertions, 14 deletions
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index df6dd624ccfe..5f5e4177b2e0 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -171,7 +171,7 @@ bool hugetlb_reserve_pages(struct inode *inode, long from, long to, vm_flags_t vm_flags); long hugetlb_unreserve_pages(struct inode *inode, long start, long end, long freed); -int isolate_hugetlb(struct folio *folio, struct list_head *list); +bool isolate_hugetlb(struct folio *folio, struct list_head *list); int get_hwpoison_hugetlb_folio(struct folio *folio, bool *hugetlb, bool unpoison); int get_huge_page_for_hwpoison(unsigned long pfn, int flags, bool *migratable_cleared); @@ -413,9 +413,9 @@ static inline pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr, return NULL; } -static inline int isolate_hugetlb(struct folio *folio, struct list_head *list) +static inline bool isolate_hugetlb(struct folio *folio, struct list_head *list) { - return -EBUSY; + return false; } static inline int get_hwpoison_hugetlb_folio(struct folio *folio, bool *hugetlb, bool unpoison) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 3a01a9dbf445..07abcb6eb203 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -2925,12 +2925,15 @@ retry: */ goto free_new; } else if (folio_ref_count(old_folio)) { + bool isolated; + /* * Someone has grabbed the folio, try to isolate it here. * Fail with -EBUSY if not possible. */ spin_unlock_irq(&hugetlb_lock); - ret = isolate_hugetlb(old_folio, list); + isolated = isolate_hugetlb(old_folio, list); + ret = isolated ? 0 : -EBUSY; spin_lock_irq(&hugetlb_lock); goto free_new; } else if (!folio_test_hugetlb_freed(old_folio)) { @@ -3005,7 +3008,7 @@ int isolate_or_dissolve_huge_page(struct page *page, struct list_head *list) if (hstate_is_gigantic(h)) return -ENOMEM; - if (folio_ref_count(folio) && !isolate_hugetlb(folio, list)) + if (folio_ref_count(folio) && isolate_hugetlb(folio, list)) ret = 0; else if (!folio_ref_count(folio)) ret = alloc_and_dissolve_hugetlb_folio(h, folio, list); @@ -7251,15 +7254,15 @@ __weak unsigned long hugetlb_mask_last_page(struct hstate *h) * These functions are overwritable if your architecture needs its own * behavior. */ -int isolate_hugetlb(struct folio *folio, struct list_head *list) +bool isolate_hugetlb(struct folio *folio, struct list_head *list) { - int ret = 0; + bool ret = true; spin_lock_irq(&hugetlb_lock); if (!folio_test_hugetlb(folio) || !folio_test_hugetlb_migratable(folio) || !folio_try_get(folio)) { - ret = -EBUSY; + ret = false; goto unlock; } folio_clear_hugetlb_migratable(folio); diff --git a/mm/memory-failure.c b/mm/memory-failure.c index e504362fdb23..8604753bc644 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -2508,7 +2508,7 @@ static bool isolate_page(struct page *page, struct list_head *pagelist) bool isolated = false; if (PageHuge(page)) { - isolated = !isolate_hugetlb(page_folio(page), pagelist); + isolated = isolate_hugetlb(page_folio(page), pagelist); } else { bool lru = !__PageMovable(page); diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 2751bc3310fd..a256a241fd1d 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -609,7 +609,7 @@ static int queue_folios_hugetlb(pte_t *pte, unsigned long hmask, if (flags & (MPOL_MF_MOVE_ALL) || (flags & MPOL_MF_MOVE && folio_estimated_sharers(folio) == 1 && !hugetlb_pmd_shared(pte))) { - if (isolate_hugetlb(folio, qp->pagelist) && + if (!isolate_hugetlb(folio, qp->pagelist) && (flags & MPOL_MF_STRICT)) /* * Failed to isolate folio but allow migrating pages diff --git a/mm/migrate.c b/mm/migrate.c index 53010a142e7f..2db546a0618c 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -2095,6 +2095,7 @@ static int add_page_for_migration(struct mm_struct *mm, unsigned long addr, struct vm_area_struct *vma; struct page *page; int err; + bool isolated; mmap_read_lock(mm); err = -EFAULT; @@ -2126,13 +2127,11 @@ static int add_page_for_migration(struct mm_struct *mm, unsigned long addr, if (PageHuge(page)) { if (PageHead(page)) { - err = isolate_hugetlb(page_folio(page), pagelist); - if (!err) - err = 1; + isolated = isolate_hugetlb(page_folio(page), pagelist); + err = isolated ? 1 : -EBUSY; } } else { struct page *head; - bool isolated; head = compound_head(page); isolated = isolate_lru_page(head); |