Re: [PATCH v2] f2fs: add fadvise tracepoint
From: Jaegeuk Kim
Date: Fri Oct 31 2025 - 17:35:51 EST
This adds a tracepoint in the fadvise call path.
Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
---
v2 from v1:
- use i_size_read()
fs/f2fs/file.c | 2 ++
include/trace/events/f2fs.h | 32 ++++++++++++++++++++++++++++++++
2 files changed, 34 insertions(+)
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 7b966f6d40d2..d7047ca6b98d 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -5288,6 +5288,8 @@ static int f2fs_file_fadvise(struct file *filp, loff_t offset, loff_t len,
struct inode *inode = file_inode(filp);
int err;
+ trace_f2fs_fadvise(inode, offset, len, advice);
+
if (advice == POSIX_FADV_SEQUENTIAL) {
if (S_ISFIFO(inode->i_mode))
return -ESPIPE;
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index e1fae78d64a5..e00611ead024 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -586,6 +586,38 @@ TRACE_EVENT(f2fs_file_write_iter,
__entry->ret)
);
+TRACE_EVENT(f2fs_fadvise,
+
+ TP_PROTO(struct inode *inode, loff_t offset, loff_t len, int advice),
+
+ TP_ARGS(inode, offset, len, advice),
+
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(ino_t, ino)
+ __field(loff_t, size)
+ __field(loff_t, offset)
+ __field(loff_t, len)
+ __field(int, advice)
+ ),
+
+ TP_fast_assign(
+ __entry->dev = inode->i_sb->s_dev;
+ __entry->ino = inode->i_ino;
+ __entry->size = i_size_read(inode);
+ __entry->offset = offset;
+ __entry->len = len;
+ __entry->advice = advice;
+ ),
+
+ TP_printk("dev = (%d,%d), ino = %lu, i_size = %lld offset:%llu, len:%llu, advise:%d",
+ show_dev_ino(__entry),
+ (unsigned long long)__entry->size,
+ __entry->offset,
+ __entry->len,
+ __entry->advice)
+);
+
TRACE_EVENT(f2fs_map_blocks,
TP_PROTO(struct inode *inode, struct f2fs_map_blocks *map, int flag,
int ret),
--
2.51.2.997.g839fc31de9-goog