Commit b8c29400 authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
Browse files

f2fs: add a tracepoint for f2fs_read_data_pages 



This patch adds a tracepoint for f2fs_read_data_pages to trace when pages
are readahead by VFS.

Signed-off-by: default avatarChao Yu <chao2.yu@samsung.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent a56c7c6f

fs/f2fs/data.c

+3 −0
Original line number Diff line number Diff line
@@ -1032,6 +1032,9 @@ static int f2fs_read_data_pages(struct file *file, 
			struct list_head *pages, unsigned nr_pages)

{

	struct inode *inode = file->f_mapping->host;

	struct page *page = list_entry(pages->prev, struct page, lru);



	trace_f2fs_readpages(inode, page, nr_pages);



	/* If the file has inline data, skip readpages */

	if (f2fs_has_inline_data(inode))

include/trace/events/f2fs.h

+26 −0
Original line number Diff line number Diff line
@@ -1028,6 +1028,32 @@ TRACE_EVENT(f2fs_writepages, 
		__entry->for_sync)

);



TRACE_EVENT(f2fs_readpages,



	TP_PROTO(struct inode *inode, struct page *page, unsigned int nrpage),



	TP_ARGS(inode, page, nrpage),



	TP_STRUCT__entry(

		__field(dev_t,	dev)

		__field(ino_t,	ino)

		__field(pgoff_t,	start)

		__field(unsigned int,	nrpage)

	),



	TP_fast_assign(

		__entry->dev	= inode->i_sb->s_dev;

		__entry->ino	= inode->i_ino;

		__entry->start	= page->index;

		__entry->nrpage	= nrpage;

	),



	TP_printk("dev = (%d,%d), ino = %lu, start = %lu nrpage = %u",

		show_dev_ino(__entry),

		(unsigned long)__entry->start,

		__entry->nrpage)

);



TRACE_EVENT(f2fs_write_checkpoint,



	TP_PROTO(struct super_block *sb, int reason, char *msg),