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In tracepoints, it's possible to print gfp flags in a human-friendly format through a macro show_gfp_flags(), which defines a translation array and passes is to __print_flags(). Since the following patch will introduce support for gfp flags printing in printk(), it would be nice to reuse the array. This is not straightforward, since __print_flags() can't simply reference an array defined in a .c file such as mm/debug.c - it has to be a macro to allow the macro magic to communicate the format to userspace tools such as trace-cmd. The solution is to create a macro __def_gfpflag_names which is used both in show_gfp_flags(), and to define the gfpflag_names[] array in mm/debug.c. On the other hand, mm/debug.c also defines translation tables for page flags and vma flags, and desire was expressed (but not implemented in this series) to use these also from tracepoints. Thus, this patch also renames the events/gfpflags.h file to events/mmflags.h and moves the table definitions there, using the same macro approach as for gfpflags. This allows translating all three kinds of mm-specific flags both in tracepoints and printk. Signed-off-by: Vlastimil Babka <vbabka@suse.cz> Reviewed-by: Michal Hocko <mhocko@suse.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Sasha Levin <sasha.levin@oracle.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Mel Gorman <mgorman@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
136 lines
3.5 KiB
C
136 lines
3.5 KiB
C
#undef TRACE_SYSTEM
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#define TRACE_SYSTEM huge_memory
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#if !defined(__HUGE_MEMORY_H) || defined(TRACE_HEADER_MULTI_READ)
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#define __HUGE_MEMORY_H
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#include <linux/tracepoint.h>
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#define SCAN_STATUS \
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EM( SCAN_FAIL, "failed") \
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EM( SCAN_SUCCEED, "succeeded") \
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EM( SCAN_PMD_NULL, "pmd_null") \
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EM( SCAN_EXCEED_NONE_PTE, "exceed_none_pte") \
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EM( SCAN_PTE_NON_PRESENT, "pte_non_present") \
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EM( SCAN_PAGE_RO, "no_writable_page") \
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EM( SCAN_NO_REFERENCED_PAGE, "no_referenced_page") \
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EM( SCAN_PAGE_NULL, "page_null") \
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EM( SCAN_SCAN_ABORT, "scan_aborted") \
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EM( SCAN_PAGE_COUNT, "not_suitable_page_count") \
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EM( SCAN_PAGE_LRU, "page_not_in_lru") \
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EM( SCAN_PAGE_LOCK, "page_locked") \
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EM( SCAN_PAGE_ANON, "page_not_anon") \
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EM( SCAN_PAGE_COMPOUND, "page_compound") \
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EM( SCAN_ANY_PROCESS, "no_process_for_page") \
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EM( SCAN_VMA_NULL, "vma_null") \
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EM( SCAN_VMA_CHECK, "vma_check_failed") \
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EM( SCAN_ADDRESS_RANGE, "not_suitable_address_range") \
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EM( SCAN_SWAP_CACHE_PAGE, "page_swap_cache") \
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EM( SCAN_DEL_PAGE_LRU, "could_not_delete_page_from_lru")\
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EM( SCAN_ALLOC_HUGE_PAGE_FAIL, "alloc_huge_page_failed") \
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EMe( SCAN_CGROUP_CHARGE_FAIL, "ccgroup_charge_failed")
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#undef EM
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#undef EMe
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#define EM(a, b) TRACE_DEFINE_ENUM(a);
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#define EMe(a, b) TRACE_DEFINE_ENUM(a);
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SCAN_STATUS
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#undef EM
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#undef EMe
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#define EM(a, b) {a, b},
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#define EMe(a, b) {a, b}
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TRACE_EVENT(mm_khugepaged_scan_pmd,
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TP_PROTO(struct mm_struct *mm, struct page *page, bool writable,
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bool referenced, int none_or_zero, int status),
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TP_ARGS(mm, page, writable, referenced, none_or_zero, status),
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TP_STRUCT__entry(
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__field(struct mm_struct *, mm)
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__field(unsigned long, pfn)
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__field(bool, writable)
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__field(bool, referenced)
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__field(int, none_or_zero)
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__field(int, status)
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),
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TP_fast_assign(
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__entry->mm = mm;
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__entry->pfn = page ? page_to_pfn(page) : -1;
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__entry->writable = writable;
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__entry->referenced = referenced;
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__entry->none_or_zero = none_or_zero;
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__entry->status = status;
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),
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TP_printk("mm=%p, scan_pfn=0x%lx, writable=%d, referenced=%d, none_or_zero=%d, status=%s",
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__entry->mm,
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__entry->pfn,
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__entry->writable,
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__entry->referenced,
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__entry->none_or_zero,
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__print_symbolic(__entry->status, SCAN_STATUS))
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);
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TRACE_EVENT(mm_collapse_huge_page,
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TP_PROTO(struct mm_struct *mm, int isolated, int status),
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TP_ARGS(mm, isolated, status),
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TP_STRUCT__entry(
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__field(struct mm_struct *, mm)
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__field(int, isolated)
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__field(int, status)
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),
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TP_fast_assign(
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__entry->mm = mm;
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__entry->isolated = isolated;
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__entry->status = status;
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),
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TP_printk("mm=%p, isolated=%d, status=%s",
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__entry->mm,
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__entry->isolated,
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__print_symbolic(__entry->status, SCAN_STATUS))
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);
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TRACE_EVENT(mm_collapse_huge_page_isolate,
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TP_PROTO(struct page *page, int none_or_zero,
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bool referenced, bool writable, int status),
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TP_ARGS(page, none_or_zero, referenced, writable, status),
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TP_STRUCT__entry(
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__field(unsigned long, pfn)
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__field(int, none_or_zero)
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__field(bool, referenced)
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__field(bool, writable)
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__field(int, status)
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),
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TP_fast_assign(
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__entry->pfn = page ? page_to_pfn(page) : -1;
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__entry->none_or_zero = none_or_zero;
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__entry->referenced = referenced;
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__entry->writable = writable;
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__entry->status = status;
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),
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TP_printk("scan_pfn=0x%lx, none_or_zero=%d, referenced=%d, writable=%d, status=%s",
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__entry->pfn,
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__entry->none_or_zero,
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__entry->referenced,
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__entry->writable,
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__print_symbolic(__entry->status, SCAN_STATUS))
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);
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#endif /* __HUGE_MEMORY_H */
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#include <trace/define_trace.h>
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