rk: temp revert rk change

[firefly-linux-kernel-4.4.55.git] / include / trace / events / filemap.h

diff --git a/include/trace/events/filemap.h b/include/trace/events/filemap.h
index 0421f49a20f7a2af50ca0ab7e7280455d1871367..e3175d0ec7f0920f4520715aca95d1a38d16a561 100644 (file)
--- a/include/trace/events/filemap.h
+++ b/include/trace/events/filemap.h
@@ -52,6 +52,52 @@ DEFINE_EVENT(mm_filemap_op_page_cache, mm_filemap_add_to_page_cache,
        TP_ARGS(page)
        );
 
+DECLARE_EVENT_CLASS(mm_filemap_find_page_cache_miss,
+
+       TP_PROTO(struct file *file, loff_t pos, size_t count, int read),
+
+       TP_ARGS(file, pos, count, read),
+
+       TP_STRUCT__entry(
+               __array(char, path, MAX_FILTER_STR_VAL)
+               __field(char *, path_name)
+               __field(loff_t, pos)
+               __field(size_t, count)
+               __field(int, miss)
+       ),
+
+       TP_fast_assign(
+               __entry->path_name = d_path(&file->f_path, __entry->path, MAX_FILTER_STR_VAL);
+               __entry->pos    = pos;
+               __entry->count  = count;
+               __entry->miss = 0;
+               if ((pos & ~PAGE_CACHE_MASK) || (count % PAGE_SIZE) || read) {
+                       unsigned long ret;
+                       rcu_read_lock();
+                       ret = (count ? page_cache_next_hole(file->f_mapping,
+                                       (pos >> PAGE_CACHE_SHIFT), ((count - 1) >> PAGE_CACHE_SHIFT) + 1) : 0);
+                       rcu_read_unlock();
+                       __entry->miss = (ret >= (pos >> PAGE_CACHE_SHIFT) &&
+                                       ret <= ((pos + count - 1) >> PAGE_CACHE_SHIFT));
+               }
+       ),
+
+       TP_printk("path_name %s pos %lld count %zu miss %s",
+                 __entry->path_name,
+                 __entry->pos, __entry->count,
+                 (__entry->miss ? "yes" : "no"))
+);
+
+DEFINE_EVENT(mm_filemap_find_page_cache_miss, mm_filemap_do_generic_file_read,
+       TP_PROTO(struct file *file, loff_t pos, size_t count, int read),
+       TP_ARGS(file, pos, count, read)
+       );
+
+DEFINE_EVENT(mm_filemap_find_page_cache_miss, mm_filemap_generic_perform_write,
+       TP_PROTO(struct file *file, loff_t pos, size_t count, int read),
+       TP_ARGS(file, pos, count, read)
+       );
+
 #endif /* _TRACE_FILEMAP_H */
 
 /* This part must be outside protection */