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| author | Chao Yu <chao2.yu@samsung.com> | 2015-10-12 12:02:26 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-10-13 00:00:34 +0300 |
| commit | b8c2940048adf4b2fcc5ae738f2bd4821ebf6a8a (patch) | |
| tree | e72060649cd483751b38400284693b3295ac42ac | |
| parent | a56c7c6fb3c60857c1335bcb8b914e6f65655486 (diff) | |
| download | linux-b8c2940048adf4b2fcc5ae738f2bd4821ebf6a8a.tar.xz | |
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>
| -rw-r--r-- | fs/f2fs/data.c | 3 | ||||
| -rw-r--r-- | include/trace/events/f2fs.h | 26 |
2 files changed, 29 insertions, 0 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index d4f1c74bab26..228537657723 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -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)) diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h index 7de751d5763b..00b4a6308249 100644 --- a/include/trace/events/f2fs.h +++ b/include/trace/events/f2fs.h @@ -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), |