tree: git://git.cmpxchg.org/linux-mmotm.git master
head: cf181493809bf6f55f40f0380d4e2f10e2588544
commit: 7d302a9cb0d503a0fd8396bd423e3e57c54c6751 [69/200] mm: add tracepoint for scanning pages
reproduce:
# apt-get install sparse
git checkout 7d302a9cb0d503a0fd8396bd423e3e57c54c6751
make ARCH=x86_64 allmodconfig
make C=1 CF=-D__CHECK_ENDIAN__
sparse warnings: (new ones prefixed by >>)
>> include/trace/events/huge_memory.h:46:1: sparse: odd constant _Bool cast (ffffffffffffffff becomes 1)
>> include/trace/events/huge_memory.h:46:1: sparse: odd constant _Bool cast (ffffffffffffffff becomes 1)
include/trace/events/huge_memory.h:104:1: sparse: odd constant _Bool cast (ffffffffffffffff becomes 1)
include/trace/events/huge_memory.h:104:1: sparse: odd constant _Bool cast (ffffffffffffffff becomes 1)
mm/huge_memory.c:1501:28: sparse: context imbalance in 'zap_huge_pmd' - unexpected unlock
mm/huge_memory.c:1569:28: sparse: context imbalance in 'move_huge_pmd' - unexpected unlock
mm/huge_memory.c:1599:36: sparse: context imbalance in 'change_huge_pmd' - unexpected unlock
mm/huge_memory.c:1625:5: sparse: context imbalance in '__pmd_trans_huge_lock' - different lock contexts for basic block
mm/huge_memory.c:1652:7: sparse: context imbalance in 'page_check_address_pmd' - different lock contexts for basic block
mm/huge_memory.c:1721:17: sparse: context imbalance in '__split_huge_page_splitting' - unexpected unlock
arch/x86/include/asm/paravirt.h:515:17: sparse: context imbalance in '__split_huge_page_map' - unexpected unlock
vim +46 include/trace/events/huge_memory.h
30 EM( SCAN_DEL_PAGE_LRU, "could_not_delete_page_from_lru")\
31 EM( SCAN_ALLOC_HUGE_PAGE_FAIL, "alloc_huge_page_failed") \
32 EMe( SCAN_CGROUP_CHARGE_FAIL, "ccgroup_charge_failed")
33
34 #undef EM
35 #undef EMe
36 #define EM(a, b) TRACE_DEFINE_ENUM(a);
37 #define EMe(a, b) TRACE_DEFINE_ENUM(a);
38
39 SCAN_STATUS
40
41 #undef EM
42 #undef EMe
43 #define EM(a, b) {a, b},
44 #define EMe(a, b) {a, b}
45
> 46 TRACE_EVENT(mm_khugepaged_scan_pmd,
47
48 TP_PROTO(struct mm_struct *mm, unsigned long pfn, bool writable,
49 bool referenced, int none_or_zero, int status),
50
51 TP_ARGS(mm, pfn, writable, referenced, none_or_zero, status),
52
53 TP_STRUCT__entry(
54 __field(struct mm_struct *, mm)
---
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