diff options
| -rw-r--r-- | include/trace/events/vmscan.h | 41 | ||||
| -rw-r--r-- | mm/vmscan.c | 2 |
2 files changed, 43 insertions, 0 deletions
diff --git a/include/trace/events/vmscan.h b/include/trace/events/vmscan.h index c0552be..69789dc 100644 --- a/include/trace/events/vmscan.h +++ b/include/trace/events/vmscan.h @@ -8,6 +8,24 @@ #include <linux/tracepoint.h> #include "gfpflags.h" +#define RECLAIM_WB_ANON 0x0001u +#define RECLAIM_WB_FILE 0x0002u +#define RECLAIM_WB_SYNC 0x0004u +#define RECLAIM_WB_ASYNC 0x0008u + +#define show_reclaim_flags(flags) \ + (flags) ? __print_flags(flags, "|", \ + {RECLAIM_WB_ANON, "RECLAIM_WB_ANON"}, \ + {RECLAIM_WB_FILE, "RECLAIM_WB_FILE"}, \ + {RECLAIM_WB_SYNC, "RECLAIM_WB_SYNC"}, \ + {RECLAIM_WB_ASYNC, "RECLAIM_WB_ASYNC"} \ + ) : "RECLAIM_WB_NONE" + +#define trace_reclaim_flags(page, sync) ( \ + (page_is_file_cache(page) ? RECLAIM_WB_FILE : RECLAIM_WB_ANON) | \ + (sync == PAGEOUT_IO_SYNC ? RECLAIM_WB_SYNC : RECLAIM_WB_ASYNC) \ + ) + TRACE_EVENT(mm_vmscan_kswapd_sleep, TP_PROTO(int nid), @@ -155,6 +173,29 @@ TRACE_EVENT(mm_vmscan_lru_isolate, __entry->nr_lumpy_failed) ); +TRACE_EVENT(mm_vmscan_writepage, + + TP_PROTO(struct page *page, + int reclaim_flags), + + TP_ARGS(page, reclaim_flags), + + TP_STRUCT__entry( + __field(struct page *, page) + __field(int, reclaim_flags) + ), + + TP_fast_assign( + __entry->page = page; + __entry->reclaim_flags = reclaim_flags; + ), + + TP_printk("page=%p pfn=%lu flags=%s", + __entry->page, + page_to_pfn(__entry->page), + show_reclaim_flags(__entry->reclaim_flags)) +); + #endif /* _TRACE_VMSCAN_H */ /* This part must be outside protection */ diff --git a/mm/vmscan.c b/mm/vmscan.c index 3d006d9..b7a4e6a 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -401,6 +401,8 @@ static pageout_t pageout(struct page *page, struct address_space *mapping, /* synchronous write or broken a_ops? */ ClearPageReclaim(page); } + trace_mm_vmscan_writepage(page, + trace_reclaim_flags(page, sync_writeback)); inc_zone_page_state(page, NR_VMSCAN_WRITE); return PAGE_SUCCESS; } |