diff options
| -rw-r--r-- | Documentation/admin-guide/kdump/vmcoreinfo.rst | 4 | ||||
| -rw-r--r-- | include/linux/mm.h | 13 | ||||
| -rw-r--r-- | include/linux/mm_types.h | 2 | ||||
| -rw-r--r-- | include/linux/page-flags.h | 7 | ||||
| -rw-r--r-- | kernel/crash_core.c | 1 | ||||
| -rw-r--r-- | mm/huge_memory.c | 4 | ||||
| -rw-r--r-- | mm/internal.h | 1 | ||||
| -rw-r--r-- | mm/page_alloc.c | 7 |
8 files changed, 11 insertions, 28 deletions
diff --git a/Documentation/admin-guide/kdump/vmcoreinfo.rst b/Documentation/admin-guide/kdump/vmcoreinfo.rst index baa1c355741d..3bd38ac0e7de 100644 --- a/Documentation/admin-guide/kdump/vmcoreinfo.rst +++ b/Documentation/admin-guide/kdump/vmcoreinfo.rst @@ -141,8 +141,8 @@ nodemask_t The size of a nodemask_t type. Used to compute the number of online nodes. -(page, flags|_refcount|mapping|lru|_mapcount|private|compound_dtor|compound_order|compound_head) -------------------------------------------------------------------------------------------------- +(page, flags|_refcount|mapping|lru|_mapcount|private|compound_order|compound_head) +---------------------------------------------------------------------------------- User-space tools compute their values based on the offset of these variables. The variables are used when excluding unnecessary pages. diff --git a/include/linux/mm.h b/include/linux/mm.h index e241f5ee4dc4..63d573781973 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1239,19 +1239,6 @@ void folio_copy(struct folio *dst, struct folio *src); unsigned long nr_free_buffer_pages(void); -enum compound_dtor_id { - COMPOUND_PAGE_DTOR, - TRANSHUGE_PAGE_DTOR, - NR_COMPOUND_DTORS, -}; - -static inline void folio_set_compound_dtor(struct folio *folio, - enum compound_dtor_id compound_dtor) -{ - VM_BUG_ON_FOLIO(compound_dtor >= NR_COMPOUND_DTORS, folio); - folio->_folio_dtor = compound_dtor; -} - void destroy_large_folio(struct folio *folio); /* Returns the number of bytes in this potentially compound page. */ diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index de5ac95572c8..1c5c2349c18e 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -264,7 +264,6 @@ static inline struct page *encoded_page_ptr(struct encoded_page *page) * @_refcount: Do not access this member directly. Use folio_ref_count() * to find how many references there are to this folio. * @memcg_data: Memory Control Group data. - * @_folio_dtor: Which destructor to use for this folio. * @_folio_order: Do not use directly, call folio_order(). * @_entire_mapcount: Do not use directly, call folio_entire_mapcount(). * @_nr_pages_mapped: Do not use directly, call folio_mapcount(). @@ -318,7 +317,6 @@ struct folio { unsigned long _flags_1; unsigned long _head_1; /* public: */ - unsigned char _folio_dtor; unsigned char _folio_order; atomic_t _entire_mapcount; atomic_t _nr_pages_mapped; diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index e9e7cc45352d..85d54b6c9e0b 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -190,6 +190,7 @@ enum pageflags { /* At least one page in this folio has the hwpoison flag set */ PG_has_hwpoisoned = PG_error, PG_hugetlb = PG_active, + PG_large_rmappable = PG_workingset, /* anon or file-backed */ }; #define PAGEFLAGS_MASK ((1UL << NR_PAGEFLAGS) - 1) @@ -806,6 +807,9 @@ static inline void ClearPageCompound(struct page *page) BUG_ON(!PageHead(page)); ClearPageHead(page); } +PAGEFLAG(LargeRmappable, large_rmappable, PF_SECOND) +#else +TESTPAGEFLAG_FALSE(LargeRmappable, large_rmappable) #endif #define PG_head_mask ((1UL << PG_head)) @@ -1077,7 +1081,8 @@ static __always_inline void __ClearPageAnonExclusive(struct page *page) * the CHECK_AT_FREE flags above, so need to be cleared. */ #define PAGE_FLAGS_SECOND \ - (1UL << PG_has_hwpoisoned | 1UL << PG_hugetlb) + (1UL << PG_has_hwpoisoned | 1UL << PG_hugetlb | \ + 1UL << PG_large_rmappable) #define PAGE_FLAGS_PRIVATE \ (1UL << PG_private | 1UL << PG_private_2) diff --git a/kernel/crash_core.c b/kernel/crash_core.c index dd5f87047d06..934dd86e19f5 100644 --- a/kernel/crash_core.c +++ b/kernel/crash_core.c @@ -455,7 +455,6 @@ static int __init crash_save_vmcoreinfo_init(void) VMCOREINFO_OFFSET(page, lru); VMCOREINFO_OFFSET(page, _mapcount); VMCOREINFO_OFFSET(page, private); - VMCOREINFO_OFFSET(folio, _folio_dtor); VMCOREINFO_OFFSET(folio, _folio_order); VMCOREINFO_OFFSET(page, compound_head); VMCOREINFO_OFFSET(pglist_data, node_zones); diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 5817bf77f1f0..2fe1ea187b6b 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -581,7 +581,7 @@ void folio_prep_large_rmappable(struct folio *folio) { VM_BUG_ON_FOLIO(folio_order(folio) < 2, folio); INIT_LIST_HEAD(&folio->_deferred_list); - folio_set_compound_dtor(folio, TRANSHUGE_PAGE_DTOR); + folio_set_large_rmappable(folio); } static inline bool is_transparent_hugepage(struct page *page) @@ -593,7 +593,7 @@ static inline bool is_transparent_hugepage(struct page *page) folio = page_folio(page); return is_huge_zero_page(&folio->page) || - folio->_folio_dtor == TRANSHUGE_PAGE_DTOR; + folio_test_large_rmappable(folio); } static unsigned long __thp_get_unmapped_area(struct file *filp, diff --git a/mm/internal.h b/mm/internal.h index 30bbfcacc909..5c0daea731f3 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -419,7 +419,6 @@ static inline void prep_compound_head(struct page *page, unsigned int order) { struct folio *folio = (struct folio *)page; - folio_set_compound_dtor(folio, COMPOUND_PAGE_DTOR); folio_set_order(folio, order); atomic_set(&folio->_entire_mapcount, -1); atomic_set(&folio->_nr_pages_mapped, 0); diff --git a/mm/page_alloc.c b/mm/page_alloc.c index d96dc6a3077a..452459836b71 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -572,9 +572,6 @@ static inline void free_the_page(struct page *page, unsigned int order) * The remaining PAGE_SIZE pages are called "tail pages". PageTail() is encoded * in bit 0 of page->compound_head. The rest of bits is pointer to head page. * - * The first tail page's ->compound_dtor describes how to destroy the - * compound page. - * * The first tail page's ->compound_order holds the order of allocation. * This usage means that zero-order pages may not be compound. */ @@ -593,14 +590,12 @@ void prep_compound_page(struct page *page, unsigned int order) void destroy_large_folio(struct folio *folio) { - enum compound_dtor_id dtor = folio->_folio_dtor; - if (folio_test_hugetlb(folio)) { free_huge_folio(folio); return; } - if (folio_test_transhuge(folio) && dtor == TRANSHUGE_PAGE_DTOR) + if (folio_test_large_rmappable(folio)) folio_undo_large_rmappable(folio); mem_cgroup_uncharge(folio); |