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Subject[PATCH v2 4/5] f2fs: add tracepoint for f2fs_filemap_fault()
Date
This patch adds tracepoint for f2fs_filemap_fault().

Signed-off-by: Chao Yu <yuchao0@huawei.com>
---
v2:
- fix wrong type of @ret parameter
fs/f2fs/file.c | 2 ++
include/trace/events/f2fs.h | 26 ++++++++++++++++++++++++++
2 files changed, 28 insertions(+)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 30d49467578e..578486e03427 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -39,6 +39,8 @@ static vm_fault_t f2fs_filemap_fault(struct vm_fault *vmf)
ret = filemap_fault(vmf);
up_read(&F2FS_I(inode)->i_mmap_sem);

+ trace_f2fs_filemap_fault(inode, vmf->pgoff, ret);
+
return ret;
}

diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index a3916b4dd57e..cfa0dcdd1462 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -1253,6 +1253,32 @@ DEFINE_EVENT(f2fs__page, f2fs_commit_inmem_page,
TP_ARGS(page, type)
);

+TRACE_EVENT(f2fs_filemap_fault,
+
+ TP_PROTO(struct inode *inode, pgoff_t index, enum vm_fault_reason ret),
+
+ TP_ARGS(inode, index, ret),
+
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(ino_t, ino)
+ __field(pgoff_t, index)
+ __field(enum vm_fault_reason, ret)
+ ),
+
+ TP_fast_assign(
+ __entry->dev = inode->i_sb->s_dev;
+ __entry->ino = inode->i_ino;
+ __entry->index = index;
+ __entry->ret = ret;
+ ),
+
+ TP_printk("dev = (%d,%d), ino = %lu, index = %lu, ret = %u",
+ show_dev_ino(__entry),
+ (unsigned long)__entry->index,
+ ret)
+);
+
TRACE_EVENT(f2fs_writepages,

TP_PROTO(struct inode *inode, struct writeback_control *wbc, int type),
--
2.18.0.rc1
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