tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 1584a68cf2ef23ac87ba506e8ab8ca7e261813c1 commit: ff0fb9e816fac221fa24a1810dd895745406070b [1473/1473] mm: thp: Add memory reliable support for hugepaged collapse config: arm64-randconfig-r113-20250309 (https://download.01.org/0day-ci/archive/20250309/202503091715.gswAJqxr-lkp@i...) compiler: aarch64-linux-gcc (GCC) 14.2.0 reproduce: (https://download.01.org/0day-ci/archive/20250309/202503091715.gswAJqxr-lkp@i...) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202503091715.gswAJqxr-lkp@intel.com/ sparse warnings: (new ones prefixed by >>)

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mm/khugepaged.c:974:21: sparse: sparse: invalid assignment: |= mm/khugepaged.c:974:21: sparse: left side has type restricted gfp_t mm/khugepaged.c:974:21: sparse: right side has type unsigned int mm/khugepaged.c:1352:21: sparse: sparse: invalid assignment: |= mm/khugepaged.c:1352:21: sparse: left side has type restricted gfp_t mm/khugepaged.c:1352:21: sparse: right side has type unsigned int mm/khugepaged.c:1378:9: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void **slot @@ got void [noderef] __rcu ** @@ mm/khugepaged.c:1378:9: sparse: expected void **slot mm/khugepaged.c:1378:9: sparse: got void [noderef] __rcu ** mm/khugepaged.c:1378:9: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void **slot @@ got void [noderef] __rcu ** @@ mm/khugepaged.c:1378:9: sparse: expected void **slot mm/khugepaged.c:1378:9: sparse: got void [noderef] __rcu ** mm/khugepaged.c:1409:56: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void [noderef] __rcu **slot @@ got void **slot @@ mm/khugepaged.c:1409:56: sparse: expected void [noderef] __rcu **slot mm/khugepaged.c:1409:56: sparse: got void **slot mm/khugepaged.c:1458:22: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void **slot @@ got void [noderef] __rcu ** @@ mm/khugepaged.c:1458:22: sparse: expected void **slot mm/khugepaged.c:1458:22: sparse: got void [noderef] __rcu ** mm/khugepaged.c:1459:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void [noderef] __rcu **slot @@ got void **slot @@ mm/khugepaged.c:1459:17: sparse: expected void [noderef] __rcu **slot mm/khugepaged.c:1459:17: sparse: got void **slot mm/khugepaged.c:1483:60: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] __rcu **slot @@ got void **slot @@ mm/khugepaged.c:1483:60: sparse: expected void [noderef] __rcu **slot mm/khugepaged.c:1483:60: sparse: got void **slot mm/khugepaged.c:1486:47: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void [noderef] __rcu **slot @@ got void **slot @@ mm/khugepaged.c:1486:47: sparse: expected void [noderef] __rcu **slot mm/khugepaged.c:1486:47: sparse: got void **slot mm/khugepaged.c:1486:22: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void **slot @@ got void [noderef] __rcu ** @@ mm/khugepaged.c:1486:22: sparse: expected void **slot mm/khugepaged.c:1486:22: sparse: got void [noderef] __rcu ** mm/khugepaged.c:1378:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void [noderef] __rcu **slot @@ got void **slot @@ mm/khugepaged.c:1378:9: sparse: expected void [noderef] __rcu **slot mm/khugepaged.c:1378:9: sparse: got void **slot mm/khugepaged.c:1378:9: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void **slot @@ got void [noderef] __rcu ** @@ mm/khugepaged.c:1378:9: sparse: expected void **slot mm/khugepaged.c:1378:9: sparse: got void [noderef] __rcu ** mm/khugepaged.c:1578:17: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void **slot @@ got void [noderef] __rcu ** @@ mm/khugepaged.c:1578:17: sparse: expected void **slot mm/khugepaged.c:1578:17: sparse: got void [noderef] __rcu ** mm/khugepaged.c:1578:17: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void **slot @@ got void [noderef] __rcu ** @@ mm/khugepaged.c:1578:17: sparse: expected void **slot mm/khugepaged.c:1578:17: sparse: got void [noderef] __rcu ** mm/khugepaged.c:1597:68: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] __rcu **slot @@ got void **slot @@ mm/khugepaged.c:1597:68: sparse: expected void [noderef] __rcu **slot mm/khugepaged.c:1597:68: sparse: got void **slot mm/khugepaged.c:1598:55: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void [noderef] __rcu **slot @@ got void **slot @@ mm/khugepaged.c:1598:55: sparse: expected void [noderef] __rcu **slot mm/khugepaged.c:1598:55: sparse: got void **slot mm/khugepaged.c:1598:30: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void **slot @@ got void [noderef] __rcu ** @@ mm/khugepaged.c:1598:30: sparse: expected void **slot mm/khugepaged.c:1598:30: sparse: got void [noderef] __rcu ** mm/khugepaged.c:1578:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void [noderef] __rcu **slot @@ got void **slot @@ mm/khugepaged.c:1578:17: sparse: expected void [noderef] __rcu **slot mm/khugepaged.c:1578:17: sparse: got void **slot mm/khugepaged.c:1578:17: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void **slot @@ got void [noderef] __rcu ** @@ mm/khugepaged.c:1578:17: sparse: expected void **slot mm/khugepaged.c:1578:17: sparse: got void [noderef] __rcu ** mm/khugepaged.c:1633:9: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void **slot @@ got void [noderef] __rcu ** @@ mm/khugepaged.c:1633:9: sparse: expected void **slot mm/khugepaged.c:1633:9: sparse: got void [noderef] __rcu ** mm/khugepaged.c:1633:9: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void **slot @@ got void [noderef] __rcu ** @@ mm/khugepaged.c:1633:9: sparse: expected void **slot mm/khugepaged.c:1633:9: sparse: got void [noderef] __rcu ** mm/khugepaged.c:1637:46: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void [noderef] __rcu **slot @@ got void **slot @@ mm/khugepaged.c:1637:46: sparse: expected void [noderef] __rcu **slot mm/khugepaged.c:1637:46: sparse: got void **slot mm/khugepaged.c:1639:30: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void **slot @@ got void [noderef] __rcu ** @@ mm/khugepaged.c:1639:30: sparse: expected void **slot mm/khugepaged.c:1639:30: sparse: got void [noderef] __rcu ** mm/khugepaged.c:1682:55: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void [noderef] __rcu **slot @@ got void **slot @@ mm/khugepaged.c:1682:55: sparse: expected void [noderef] __rcu **slot mm/khugepaged.c:1682:55: sparse: got void **slot mm/khugepaged.c:1682:30: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void **slot @@ got void [noderef] __rcu ** @@ mm/khugepaged.c:1682:30: sparse: expected void **slot mm/khugepaged.c:1682:30: sparse: got void [noderef] __rcu ** mm/khugepaged.c:1633:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void [noderef] __rcu **slot @@ got void **slot @@ mm/khugepaged.c:1633:9: sparse: expected void [noderef] __rcu **slot mm/khugepaged.c:1633:9: sparse: got void **slot mm/khugepaged.c:1633:9: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void **slot @@ got void [noderef] __rcu ** @@ mm/khugepaged.c:1633:9: sparse: expected void **slot mm/khugepaged.c:1633:9: sparse: got void [noderef] __rcu ** mm/khugepaged.c: note: in included file (through include/linux/mm.h): include/linux/gfp.h:457:34: sparse: sparse: restricted gfp_t degrades to integer In file included from arch/arm64/include/asm/atomic.h:36, from include/linux/atomic.h:7, from include/asm-generic/bitops/atomic.h:5, from arch/arm64/include/asm/bitops.h:37, from include/linux/bitops.h:19, from include/linux/kernel.h:11, from include/asm-generic/bug.h:18, from arch/arm64/include/asm/bug.h:37, from include/linux/bug.h:5, from include/linux/mmdebug.h:5, from include/linux/mm.h:10, from mm/khugepaged.c:4: In function '__cmpxchg_case_acq_4', inlined from '__cmpxchg_acq' at arch/arm64/include/asm/cmpxchg.h:141:1, inlined from 'queued_spin_lock' at include/asm-generic/qspinlock.h:85:8, inlined from 'do_raw_spin_lock' at include/linux/spinlock.h:180:2, inlined from '__raw_spin_lock' at include/linux/spinlock_api_smp.h:143:2, inlined from 'spin_lock' at include/linux/spinlock.h:329:2,

vim +974 mm/khugepaged.c 949 950 static void collapse_huge_page(struct mm_struct *mm, 951 unsigned long address, 952 struct page **hpage, 953 int node, int referenced, int unmapped, 954 bool reliable) 955 { 956 pmd_t *pmd, _pmd; 957 pte_t *pte; 958 pgtable_t pgtable; 959 struct page *new_page; 960 spinlock_t *pmd_ptl, *pte_ptl; 961 int isolated = 0, result = 0; 962 struct mem_cgroup *memcg; 963 struct vm_area_struct *vma; 964 unsigned long mmun_start; /* For mmu_notifiers */ 965 unsigned long mmun_end; /* For mmu_notifiers */ 966 gfp_t gfp; 967 968 VM_BUG_ON(address & ~HPAGE_PMD_MASK); 969 970 /* Only allocate from the target node */ 971 gfp = alloc_hugepage_khugepaged_gfpmask() | __GFP_THISNODE; 972 973 if (reliable)

974 gfp |= ___GFP_RELIABILITY; 975 976 /* 977 * Before allocating the hugepage, release the mmap_sem read lock. 978 * The allocation can take potentially a long time if it involves 979 * sync compaction, and we do not need to hold the mmap_sem during 980 * that. We will recheck the vma after taking it again in write mode. 981 */ 982 up_read(&mm->mmap_sem); 983 new_page = khugepaged_alloc_page(hpage, gfp, node); 984 if (!new_page) { 985 result = SCAN_ALLOC_HUGE_PAGE_FAIL; 986 goto out_nolock; 987 } 988 989 if (unlikely(mem_cgroup_try_charge(new_page, mm, gfp, &memcg, true))) { 990 result = SCAN_CGROUP_CHARGE_FAIL; 991 goto out_nolock; 992 } 993 994 down_read(&mm->mmap_sem); 995 result = hugepage_vma_revalidate(mm, address, &vma); 996 if (result) { 997 mem_cgroup_cancel_charge(new_page, memcg, true); 998 up_read(&mm->mmap_sem); 999 goto out_nolock; 1000 } 1001 1002 pmd = mm_find_pmd(mm, address); 1003 if (!pmd) { 1004 result = SCAN_PMD_NULL; 1005 mem_cgroup_cancel_charge(new_page, memcg, true); 1006 up_read(&mm->mmap_sem); 1007 goto out_nolock; 1008 } 1009 1010 /* 1011 * __collapse_huge_page_swapin always returns with mmap_sem locked. 1012 * If it fails, we release mmap_sem and jump out_nolock. 1013 * Continuing to collapse causes inconsistency. 1014 */ 1015 if (unmapped && !__collapse_huge_page_swapin(mm, vma, address, 1016 pmd, referenced)) { 1017 mem_cgroup_cancel_charge(new_page, memcg, true); 1018 up_read(&mm->mmap_sem); 1019 goto out_nolock; 1020 } 1021 1022 up_read(&mm->mmap_sem); 1023 /* 1024 * Prevent all access to pagetables with the exception of 1025 * gup_fast later handled by the ptep_clear_flush and the VM 1026 * handled by the anon_vma lock + PG_lock. 1027 */ 1028 down_write(&mm->mmap_sem); 1029 result = hugepage_vma_revalidate(mm, address, &vma); 1030 if (result) 1031 goto out; 1032 /* check if the pmd is still valid */ 1033 if (mm_find_pmd(mm, address) != pmd) 1034 goto out; 1035 1036 anon_vma_lock_write(vma->anon_vma); 1037 1038 pte = pte_offset_map(pmd, address); 1039 pte_ptl = pte_lockptr(mm, pmd); 1040 1041 mmun_start = address; 1042 mmun_end = address + HPAGE_PMD_SIZE; 1043 mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end); 1044 pmd_ptl = pmd_lock(mm, pmd); /* probably unnecessary */ 1045 /* 1046 * After this gup_fast can't run anymore. This also removes 1047 * any huge TLB entry from the CPU so we won't allow 1048 * huge and small TLB entries for the same virtual address 1049 * to avoid the risk of CPU bugs in that area. 1050 */ 1051 _pmd = pmdp_collapse_flush(vma, address, pmd); 1052 spin_unlock(pmd_ptl); 1053 mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); 1054 1055 spin_lock(pte_ptl); 1056 isolated = __collapse_huge_page_isolate(vma, address, pte); 1057 spin_unlock(pte_ptl); 1058 1059 if (unlikely(!isolated)) { 1060 pte_unmap(pte); 1061 spin_lock(pmd_ptl); 1062 BUG_ON(!pmd_none(*pmd)); 1063 /* 1064 * We can only use set_pmd_at when establishing 1065 * hugepmds and never for establishing regular pmds that 1066 * points to regular pagetables. Use pmd_populate for that 1067 */ 1068 pmd_populate(mm, pmd, pmd_pgtable(_pmd)); 1069 spin_unlock(pmd_ptl); 1070 anon_vma_unlock_write(vma->anon_vma); 1071 result = SCAN_FAIL; 1072 goto out; 1073 } 1074 1075 /* 1076 * All pages are isolated and locked so anon_vma rmap 1077 * can't run anymore. 1078 */ 1079 anon_vma_unlock_write(vma->anon_vma); 1080 1081 __collapse_huge_page_copy(pte, new_page, vma, address, pte_ptl); 1082 pte_unmap(pte); 1083 __SetPageUptodate(new_page); 1084 pgtable = pmd_pgtable(_pmd); 1085 1086 _pmd = mk_huge_pmd(new_page, vma->vm_page_prot); 1087 _pmd = maybe_pmd_mkwrite(pmd_mkdirty(_pmd), vma); 1088 1089 /* 1090 * spin_lock() below is not the equivalent of smp_wmb(), so 1091 * this is needed to avoid the copy_huge_page writes to become 1092 * visible after the set_pmd_at() write. 1093 */ 1094 smp_wmb(); 1095 1096 spin_lock(pmd_ptl); 1097 BUG_ON(!pmd_none(*pmd)); 1098 page_add_new_anon_rmap(new_page, vma, address, true); 1099 mem_cgroup_commit_charge(new_page, memcg, false, true); 1100 count_memcg_events(memcg, THP_COLLAPSE_ALLOC, 1); 1101 lru_cache_add_active_or_unevictable(new_page, vma); 1102 pgtable_trans_huge_deposit(mm, pmd, pgtable); 1103 set_pmd_at(mm, address, pmd, _pmd); 1104 update_mmu_cache_pmd(vma, address, pmd); 1105 spin_unlock(pmd_ptl); 1106 1107 *hpage = NULL; 1108 1109 khugepaged_pages_collapsed++; 1110 result = SCAN_SUCCEED; 1111 out_up_write: 1112 up_write(&mm->mmap_sem); 1113 out_nolock: 1114 trace_mm_collapse_huge_page(mm, isolated, result); 1115 return; 1116 out: 1117 mem_cgroup_cancel_charge(new_page, memcg, true); 1118 goto out_up_write; 1119 } 1120

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