This patch adds a tracepoint to track the f2fs_readahead_pages().
Signed-off-by: Jaegeuk Kim <[email protected]>
---
fs/f2fs/data.c | 3 +++
include/trace/events/f2fs.h | 43 +++++++++++++++++++++++++++++++++++++
2 files changed, 46 insertions(+)
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index d95974d79fb3..c80d7960b652 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -2757,6 +2757,8 @@ int f2fs_readahead_pages(struct file *file, loff_t
offset, loff_t len)
if (start_index > end_index)
return 0;
+ trace_f2fs_readahead_pages_start(inode, start_index, end_index);
+
nrpages = end_index - start_index + 1;
while (nrpages) {
@@ -2768,6 +2770,7 @@ int f2fs_readahead_pages(struct file *file, loff_t
offset, loff_t len)
nrpages -= this_chunk;
}
+ trace_f2fs_readahead_pages_end(inode, start_index, end_index);
return 0;
}
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index d406b047c50b..bb98a9655ec9 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -618,6 +618,49 @@ TRACE_EVENT(f2fs_fadvise,
__entry->advice)
);
+DECLARE_EVENT_CLASS(f2fs__readahead_pages,
+
+ TP_PROTO(struct inode *inode, pgoff_t start, pgoff_t end),
+
+ TP_ARGS(inode, start, end),
+
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(ino_t, ino)
+ __field(loff_t, size)
+ __field(pgoff_t, start)
+ __field(pgoff_t, end)
+ ),
+
+ TP_fast_assign(
+ __entry->dev = inode->i_sb->s_dev;
+ __entry->ino = inode->i_ino;
+ __entry->size = inode->i_size;
+ __entry->start = start;
+ __entry->end = end;
+ ),
+
+ TP_printk("dev = (%d,%d), ino = %lu, i_size = %lld start: %lu, end:
%lu",
+ show_dev_ino(__entry),
+ (unsigned long long)__entry->size,
+ __entry->start,
+ __entry->end)
+);
+
+DEFINE_EVENT(f2fs__readahead_pages, f2fs_readahead_pages_start,
+
+ TP_PROTO(struct inode *inode, pgoff_t start, pgoff_t end),
+
+ TP_ARGS(inode, start, end)
+);
+
+DEFINE_EVENT(f2fs__readahead_pages, f2fs_readahead_pages_end,
+
+ TP_PROTO(struct inode *inode, pgoff_t start, pgoff_t end),
+
+ TP_ARGS(inode, start, end)
+);
+
TRACE_EVENT(f2fs_map_blocks,
TP_PROTO(struct inode *inode, struct f2fs_map_blocks *map, int flag,
int ret),
--
2.52.0.487.g5c8c507ade-goog
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