This patch adds a tracepoint for f2fs_read_data_pages to trace when pages are readahead by VFS.
Signed-off-by: Chao Yu <[email protected]> --- fs/f2fs/data.c | 3 +++ include/trace/events/f2fs.h | 26 ++++++++++++++++++++++++++ 2 files changed, 29 insertions(+) diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 8c250a5..f2d1e8a 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -729,6 +729,9 @@ 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 b983990..7fbaaaa 100644 --- a/include/trace/events/f2fs.h +++ b/include/trace/events/f2fs.h @@ -847,6 +847,32 @@ 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_submit_page_mbio, TP_PROTO(struct page *page, int rw, int type, block_t blk_addr), -- 1.7.9.5 ------------------------------------------------------------------------------ Is your legacy SCM system holding you back? Join Perforce May 7 to find out: • 3 signs your SCM is hindering your productivity • Requirements for releasing software faster • Expert tips and advice for migrating your SCM now http://p.sf.net/sfu/perforce _______________________________________________ Linux-f2fs-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
