f2fs: add a tracepoint for f2fs_read_data_pages
This patch adds a tracepoint for f2fs_read_data_pages to trace when pages
are readahead by VFS.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index 7de751d..00b4a63 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -1028,6 +1028,32 @@
__entry->for_sync)
);
+TRACE_EVENT(f2fs_readpages,
+
+ TP_PROTO(struct inode *inode, struct page *page, unsigned int nrpage),
+
+ TP_ARGS(inode, page, nrpage),
+
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(ino_t, ino)
+ __field(pgoff_t, start)
+ __field(unsigned int, nrpage)
+ ),
+
+ TP_fast_assign(
+ __entry->dev = inode->i_sb->s_dev;
+ __entry->ino = inode->i_ino;
+ __entry->start = page->index;
+ __entry->nrpage = nrpage;
+ ),
+
+ TP_printk("dev = (%d,%d), ino = %lu, start = %lu nrpage = %u",
+ show_dev_ino(__entry),
+ (unsigned long)__entry->start,
+ __entry->nrpage)
+);
+
TRACE_EVENT(f2fs_write_checkpoint,
TP_PROTO(struct super_block *sb, int reason, char *msg),