f2fs: add tracepoint for tracing the page i/o
Add tracepoints for page i/o operations and block allocation
tracing during page read operation.
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Pankaj Kumar <pankaj.km@samsung.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
[Jaegeuk: combine and modify the tracepoint structures]
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 3c31ec7..8e8b14d 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -21,6 +21,7 @@
#include "f2fs.h"
#include "node.h"
#include "segment.h"
+#include <trace/events/f2fs.h>
/*
* Lock ordering for the change of data block address:
@@ -348,6 +349,8 @@
struct block_device *bdev = sbi->sb->s_bdev;
struct bio *bio;
+ trace_f2fs_readpage(page, blk_addr, type);
+
down_read(&sbi->bio_sem);
/* Allocate a new bio */
@@ -388,14 +391,18 @@
/* Get the page offset from the block offset(iblock) */
pgofs = (pgoff_t)(iblock >> (PAGE_CACHE_SHIFT - blkbits));
- if (check_extent_cache(inode, pgofs, bh_result))
+ if (check_extent_cache(inode, pgofs, bh_result)) {
+ trace_f2fs_get_data_block(inode, iblock, bh_result, 0);
return 0;
+ }
/* When reading holes, we need its node page */
set_new_dnode(&dn, inode, NULL, NULL, 0);
err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE_RA);
- if (err)
+ if (err) {
+ trace_f2fs_get_data_block(inode, iblock, bh_result, err);
return (err == -ENOENT) ? 0 : err;
+ }
/* It does not support data allocation */
BUG_ON(create);
@@ -420,6 +427,7 @@
bh_result->b_size = (i << blkbits);
}
f2fs_put_dnode(&dn);
+ trace_f2fs_get_data_block(inode, iblock, bh_result, 0);
return 0;
}