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-rw-r--r--include/trace/events/pagemap.h89
-rw-r--r--mm/swap.c5
2 files changed, 94 insertions, 0 deletions
diff --git a/include/trace/events/pagemap.h b/include/trace/events/pagemap.h
new file mode 100644
index 00000000000..1c9fabde69e
--- /dev/null
+++ b/include/trace/events/pagemap.h
@@ -0,0 +1,89 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM pagemap
+
+#if !defined(_TRACE_PAGEMAP_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_PAGEMAP_H
+
+#include <linux/tracepoint.h>
+#include <linux/mm.h>
+
+#define PAGEMAP_MAPPED 0x0001u
+#define PAGEMAP_ANONYMOUS 0x0002u
+#define PAGEMAP_FILE 0x0004u
+#define PAGEMAP_SWAPCACHE 0x0008u
+#define PAGEMAP_SWAPBACKED 0x0010u
+#define PAGEMAP_MAPPEDDISK 0x0020u
+#define PAGEMAP_BUFFERS 0x0040u
+
+#define trace_pagemap_flags(page) ( \
+ (PageAnon(page) ? PAGEMAP_ANONYMOUS : PAGEMAP_FILE) | \
+ (page_mapped(page) ? PAGEMAP_MAPPED : 0) | \
+ (PageSwapCache(page) ? PAGEMAP_SWAPCACHE : 0) | \
+ (PageSwapBacked(page) ? PAGEMAP_SWAPBACKED : 0) | \
+ (PageMappedToDisk(page) ? PAGEMAP_MAPPEDDISK : 0) | \
+ (page_has_private(page) ? PAGEMAP_BUFFERS : 0) \
+ )
+
+TRACE_EVENT(mm_lru_insertion,
+
+ TP_PROTO(
+ struct page *page,
+ unsigned long pfn,
+ int lru,
+ unsigned long flags
+ ),
+
+ TP_ARGS(page, pfn, lru, flags),
+
+ TP_STRUCT__entry(
+ __field(struct page *, page )
+ __field(unsigned long, pfn )
+ __field(int, lru )
+ __field(unsigned long, flags )
+ ),
+
+ TP_fast_assign(
+ __entry->page = page;
+ __entry->pfn = pfn;
+ __entry->lru = lru;
+ __entry->flags = flags;
+ ),
+
+ /* Flag format is based on page-types.c formatting for pagemap */
+ TP_printk("page=%p pfn=%lu lru=%d flags=%s%s%s%s%s%s",
+ __entry->page,
+ __entry->pfn,
+ __entry->lru,
+ __entry->flags & PAGEMAP_MAPPED ? "M" : " ",
+ __entry->flags & PAGEMAP_ANONYMOUS ? "a" : "f",
+ __entry->flags & PAGEMAP_SWAPCACHE ? "s" : " ",
+ __entry->flags & PAGEMAP_SWAPBACKED ? "b" : " ",
+ __entry->flags & PAGEMAP_MAPPEDDISK ? "d" : " ",
+ __entry->flags & PAGEMAP_BUFFERS ? "B" : " ")
+);
+
+TRACE_EVENT(mm_lru_activate,
+
+ TP_PROTO(struct page *page, unsigned long pfn),
+
+ TP_ARGS(page, pfn),
+
+ TP_STRUCT__entry(
+ __field(struct page *, page )
+ __field(unsigned long, pfn )
+ ),
+
+ TP_fast_assign(
+ __entry->page = page;
+ __entry->pfn = pfn;
+ ),
+
+ /* Flag format is based on page-types.c formatting for pagemap */
+ TP_printk("page=%p pfn=%lu", __entry->page, __entry->pfn)
+
+);
+
+#endif /* _TRACE_PAGEMAP_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
diff --git a/mm/swap.c b/mm/swap.c
index dfd7d71d684..53c9ceb7b81 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -34,6 +34,9 @@
#include "internal.h"
+#define CREATE_TRACE_POINTS
+#include <trace/events/pagemap.h>
+
/* How many pages do we try to swap or page in/out together? */
int page_cluster;
@@ -384,6 +387,7 @@ static void __activate_page(struct page *page, struct lruvec *lruvec,
SetPageActive(page);
lru += LRU_ACTIVE;
add_page_to_lru_list(page, lruvec, lru);
+ trace_mm_lru_activate(page, page_to_pfn(page));
__count_vm_event(PGACTIVATE);
update_page_reclaim_stat(lruvec, file, 1);
@@ -808,6 +812,7 @@ static void __pagevec_lru_add_fn(struct page *page, struct lruvec *lruvec,
SetPageActive(page);
add_page_to_lru_list(page, lruvec, lru);
update_page_reclaim_stat(lruvec, file, active);
+ trace_mm_lru_insertion(page, page_to_pfn(page), lru, trace_pagemap_flags(page));
}
/*