From: Namjae Jeon <namjae.j...@samsung.com>
Add tracepoints for page i/o operations and block allocation
tracing during page read operation.
Signed-off-by: Namjae Jeon <namjae.j...@samsung.com>
Signed-off-by: Pankaj Kumar <pankaj...@samsung.com>
---
fs/f2fs/data.c | 9 ++++++-
include/trace/events/f2fs.h | 61 +++++++++++++++++++++++++++++++++++++++++++
2 files changed, 69 insertions(+), 1 deletion(-)
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 4f4da0d..d5d5a7c 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -22,6 +22,7 @@
#include "f2fs.h"
#include "node.h"
#include "segment.h"
+#include <trace/events/f2fs.h>
/*
* Lock ordering for the change of data block address:
@@ -346,6 +347,8 @@ int f2fs_readpage(struct f2fs_sb_info *sbi, struct page
*page,
struct block_device *bdev = sbi->sb->s_bdev;
struct bio *bio;
+ trace_f2fs_readpage(page);
+
down_read(&sbi->bio_sem);
/* Allocate a new bio */
@@ -383,6 +386,7 @@ static int get_data_block_ro(struct inode *inode, sector_t
iblock,
pgoff_t pgofs;
int err;
+ trace_f2fs_get_data_block_enter(inode, iblock, 0);
/* Get the page offset from the block offset(iblock) */
pgofs = (pgoff_t)(iblock >> (PAGE_CACHE_SHIFT - blkbits));
@@ -392,8 +396,10 @@ static int get_data_block_ro(struct inode *inode, sector_t
iblock,
/* 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_exit(inode, iblock, err);
return (err == -ENOENT) ? 0 : err;
+ }
/* It does not support data allocation */
BUG_ON(create);
@@ -418,6 +424,7 @@ static int get_data_block_ro(struct inode *inode, sector_t
iblock,
bh_result->b_size = (i << blkbits);
}
f2fs_put_dnode(&dn);
+ trace_f2fs_get_data_block_exit(inode, iblock, 0);
return 0;
}
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index 0d39f58..3df0525 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -266,6 +266,67 @@ TRACE_EVENT(f2fs_truncate,
(unsigned long) __entry->ino)
);
+TRACE_EVENT_CONDITION(f2fs_readpage,
+ TP_PROTO(struct page *page),
+
+ TP_ARGS(page),
+
+ TP_CONDITION(page->mapping),
+
+ TP_STRUCT__entry(
+ __field(pgoff_t, index)
+ __field(ino_t, ino)
+ __field(dev_t, dev)
+
+ ),
+
+ TP_fast_assign(
+ __entry->index = page->index;
+ __entry->ino = page->mapping->host->i_ino;
+ __entry->dev = page->mapping->host->i_sb->s_dev;
+ ),
+
+ TP_printk("dev %d,%d ino %lu page_index %lu",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ (unsigned long) __entry->ino,
+ (unsigned long) __entry->index)
+);
+
+DECLARE_EVENT_CLASS(f2fs_data_block,
+ TP_PROTO(struct inode *inode, sector_t block, int ret),
+
+ TP_ARGS(inode, block, ret),
+
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(ino_t, ino)
+ __field(sector_t, block)
+ __field(int, ret)
+ ),
+
+ TP_fast_assign(
+ __entry->dev = inode->i_sb->s_dev;
+ __entry->ino = inode->i_ino;
+ __entry->block = block;
+ __entry->ret = ret;
+ ),
+
+ TP_printk("dev %d,%d ino %lu block number %llu error %d",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ (unsigned long) __entry->ino,
+ (unsigned long long) __entry->block, __entry->ret)
+);
+
+DEFINE_EVENT(f2fs_data_block, f2fs_get_data_block_enter,
+ TP_PROTO(struct inode *inode, sector_t block, int ret),
+ TP_ARGS(inode, block, ret)
+);
+
+DEFINE_EVENT(f2fs_data_block, f2fs_get_data_block_exit,
+ TP_PROTO(struct inode *inode, sector_t block, int ret),
+ TP_ARGS(inode, block, ret)
+);
+
#endif /* _TRACE_F2FS_H */
/* This part must be outside protection */
--
1.7.9.5
--
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