diff options
| author | Mel Gorman <mgorman@suse.de> | 2012-10-19 14:07:31 +0100 |
|---|---|---|
| committer | Mel Gorman <mgorman@suse.de> | 2012-12-11 14:28:35 +0000 |
| commit | 7b2a2d4a18fffac3c4872021529b0657896db788 (patch) | |
| tree | a0f05be191f12711a774368f6feb15bcd2eebf1a /include | |
| parent | 5647bc293ab15f66a7b1cda850c5e9d162a6c7c2 (diff) | |
mm: migrate: Add a tracepoint for migrate_pages
The pgmigrate_success and pgmigrate_fail vmstat counters tells the user
about migration activity but not the type or the reason. This patch adds
a tracepoint to identify the type of page migration and why the page is
being migrated.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/migrate.h | 13 | ||||
| -rw-r--r-- | include/trace/events/migrate.h | 51 |
2 files changed, 62 insertions, 2 deletions
diff --git a/include/linux/migrate.h b/include/linux/migrate.h index ce7e6671968..9d1c159e242 100644 --- a/include/linux/migrate.h +++ b/include/linux/migrate.h @@ -7,6 +7,15 @@ typedef struct page *new_page_t(struct page *, unsigned long private, int **); +enum migrate_reason { + MR_COMPACTION, + MR_MEMORY_FAILURE, + MR_MEMORY_HOTPLUG, + MR_SYSCALL, /* also applies to cpusets */ + MR_MEMPOLICY_MBIND, + MR_CMA +}; + #ifdef CONFIG_MIGRATION extern void putback_lru_pages(struct list_head *l); @@ -14,7 +23,7 @@ extern int migrate_page(struct address_space *, struct page *, struct page *, enum migrate_mode); extern int migrate_pages(struct list_head *l, new_page_t x, unsigned long private, bool offlining, - enum migrate_mode mode); + enum migrate_mode mode, int reason); extern int migrate_huge_page(struct page *, new_page_t x, unsigned long private, bool offlining, enum migrate_mode mode); @@ -35,7 +44,7 @@ extern int migrate_huge_page_move_mapping(struct address_space *mapping, static inline void putback_lru_pages(struct list_head *l) {} static inline int migrate_pages(struct list_head *l, new_page_t x, unsigned long private, bool offlining, - enum migrate_mode mode) { return -ENOSYS; } + enum migrate_mode mode, int reason) { return -ENOSYS; } static inline int migrate_huge_page(struct page *page, new_page_t x, unsigned long private, bool offlining, enum migrate_mode mode) { return -ENOSYS; } diff --git a/include/trace/events/migrate.h b/include/trace/events/migrate.h new file mode 100644 index 00000000000..ec2a6ccfd7e --- /dev/null +++ b/include/trace/events/migrate.h @@ -0,0 +1,51 @@ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM migrate + +#if !defined(_TRACE_MIGRATE_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_MIGRATE_H + +#define MIGRATE_MODE \ + {MIGRATE_ASYNC, "MIGRATE_ASYNC"}, \ + {MIGRATE_SYNC_LIGHT, "MIGRATE_SYNC_LIGHT"}, \ + {MIGRATE_SYNC, "MIGRATE_SYNC"} + +#define MIGRATE_REASON \ + {MR_COMPACTION, "compaction"}, \ + {MR_MEMORY_FAILURE, "memory_failure"}, \ + {MR_MEMORY_HOTPLUG, "memory_hotplug"}, \ + {MR_SYSCALL, "syscall_or_cpuset"}, \ + {MR_MEMPOLICY_MBIND, "mempolicy_mbind"}, \ + {MR_CMA, "cma"} + +TRACE_EVENT(mm_migrate_pages, + + TP_PROTO(unsigned long succeeded, unsigned long failed, + enum migrate_mode mode, int reason), + + TP_ARGS(succeeded, failed, mode, reason), + + TP_STRUCT__entry( + __field( unsigned long, succeeded) + __field( unsigned long, failed) + __field( enum migrate_mode, mode) + __field( int, reason) + ), + + TP_fast_assign( + __entry->succeeded = succeeded; + __entry->failed = failed; + __entry->mode = mode; + __entry->reason = reason; + ), + + TP_printk("nr_succeeded=%lu nr_failed=%lu mode=%s reason=%s", + __entry->succeeded, + __entry->failed, + __print_symbolic(__entry->mode, MIGRATE_MODE), + __print_symbolic(__entry->reason, MIGRATE_REASON)) +); + +#endif /* _TRACE_MIGRATE_H */ + +/* This part must be outside protection */ +#include <trace/define_trace.h> |