From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chao Yu Subject: [f2fs-dev][PATCH 6/6] f2fs: add a tracepoint for f2fs_read_data_pages Date: Tue, 06 May 2014 16:54:23 +0800 Message-ID: <004801cf6908$e2149bd0$a63dd370$@samsung.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: Content-language: zh-cn Sender: linux-fsdevel-owner@vger.kernel.org To: Jaegeuk Kim Cc: linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org List-Id: linux-f2fs-devel.lists.sourceforge.net This patch adds a tracepoint for f2fs_read_data_pages to trace when pages are readahead by VFS. Signed-off-by: Chao Yu --- 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