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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: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2015-10-12 17:02:26 +08:00 committed by Jaegeuk Kim
parent a56c7c6fb3
commit b8c2940048
2 changed files with 29 additions and 0 deletions
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3
fs/f2fs/data.c
View File

@ -1032,6 +1032,9 @@ static int f2fs_read_data_pages(struct file *file,
struct list_head *pages, unsigned nr_pages) struct list_head *pages, unsigned nr_pages)
{ {
struct inode *inode = file->f_mapping->host; 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 the file has inline data, skip readpages */
if (f2fs_has_inline_data(inode)) if (f2fs_has_inline_data(inode))

26
include/trace/events/f2fs.h
View File

@ -1028,6 +1028,32 @@ TRACE_EVENT(f2fs_writepages,
__entry->for_sync) __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, TRACE_EVENT(f2fs_write_checkpoint,
TP_PROTO(struct super_block *sb, int reason, char *msg), TP_PROTO(struct super_block *sb, int reason, char *msg),