diff options
| -rw-r--r-- | include/trace/events/filemap.h | 58 | ||||
| -rw-r--r-- | mm/filemap.c | 5 |
2 files changed, 63 insertions, 0 deletions
diff --git a/include/trace/events/filemap.h b/include/trace/events/filemap.h new file mode 100644 index 00000000000..0421f49a20f --- /dev/null +++ b/include/trace/events/filemap.h @@ -0,0 +1,58 @@ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM filemap + +#if !defined(_TRACE_FILEMAP_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_FILEMAP_H + +#include <linux/types.h> +#include <linux/tracepoint.h> +#include <linux/mm.h> +#include <linux/memcontrol.h> +#include <linux/device.h> +#include <linux/kdev_t.h> + +DECLARE_EVENT_CLASS(mm_filemap_op_page_cache, + + TP_PROTO(struct page *page), + + TP_ARGS(page), + + TP_STRUCT__entry( + __field(struct page *, page) + __field(unsigned long, i_ino) + __field(unsigned long, index) + __field(dev_t, s_dev) + ), + + TP_fast_assign( + __entry->page = page; + __entry->i_ino = page->mapping->host->i_ino; + __entry->index = page->index; + if (page->mapping->host->i_sb) + __entry->s_dev = page->mapping->host->i_sb->s_dev; + else + __entry->s_dev = page->mapping->host->i_rdev; + ), + + TP_printk("dev %d:%d ino %lx page=%p pfn=%lu ofs=%lu", + MAJOR(__entry->s_dev), MINOR(__entry->s_dev), + __entry->i_ino, + __entry->page, + page_to_pfn(__entry->page), + __entry->index << PAGE_SHIFT) +); + +DEFINE_EVENT(mm_filemap_op_page_cache, mm_filemap_delete_from_page_cache, + TP_PROTO(struct page *page), + TP_ARGS(page) + ); + +DEFINE_EVENT(mm_filemap_op_page_cache, mm_filemap_add_to_page_cache, + TP_PROTO(struct page *page), + TP_ARGS(page) + ); + +#endif /* _TRACE_FILEMAP_H */ + +/* This part must be outside protection */ +#include <trace/define_trace.h> diff --git a/mm/filemap.c b/mm/filemap.c index e1979fdca80..2581826409f 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -35,6 +35,9 @@ #include <linux/cleancache.h> #include "internal.h" +#define CREATE_TRACE_POINTS +#include <trace/events/filemap.h> + /* * FIXME: remove all knowledge of the buffer layer from the core VM */ @@ -113,6 +116,7 @@ void __delete_from_page_cache(struct page *page) { struct address_space *mapping = page->mapping; + trace_mm_filemap_delete_from_page_cache(page); /* * if we're uptodate, flush out into the cleancache, otherwise * invalidate any existing cleancache entries. We can't leave @@ -464,6 +468,7 @@ int add_to_page_cache_locked(struct page *page, struct address_space *mapping, mapping->nrpages++; __inc_zone_page_state(page, NR_FILE_PAGES); spin_unlock_irq(&mapping->tree_lock); + trace_mm_filemap_add_to_page_cache(page); } else { page->mapping = NULL; /* Leave page->index set: truncation relies upon it */ |