From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751949AbbJLJDL (ORCPT ); Mon, 12 Oct 2015 05:03:11 -0400 Received: from mailout4.samsung.com ([203.254.224.34]:44153 "EHLO mailout4.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751346AbbJLJDI (ORCPT ); Mon, 12 Oct 2015 05:03:08 -0400 X-AuditID: cbfee61a-f79a06d000005c6f-f7-561b7749d2fa From: Chao Yu To: Jaegeuk Kim Cc: linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org Subject: [PATCH 1/5] f2fs: add a tracepoint for f2fs_read_data_pages Date: Mon, 12 Oct 2015 17:02:26 +0800 Message-id: <020f01d104cc$cf35e3f0$6da1abd0$@samsung.com> MIME-version: 1.0 Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7bit X-Mailer: Microsoft Outlook 14.0 Thread-index: AdEEzGUy4YaxzJlIR/SYVgCKnFuYuA== Content-language: zh-cn X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrNLMWRmVeSWpSXmKPExsVy+t9jQV3Pcukwg3/ftC2erJ/FbHFpkbvF 5V1z2ByYPTat6mTz2L3gM5PH501yAcxRXDYpqTmZZalF+nYJXBnHrmcVfOCteNLziq2BcRN3 FyMnh4SAicTlxytZIWwxiQv31rN1MXJxCAnMYpTY/vgGC4TzilFi4YY5YFVsAioSyzv+M4HY IkD2oUWX2UFsZgEPicaO72A1wgIuEks/7AWrYRFQlbj5/xyYzStgKbGq7z8rhC0o8WPyPRaI Xi2J9TuPM0HY8hKb17xlhrhIQWLH2deMELv0JC59aoWqEZfYeOQWywRGoDMRRs1CMmoWklGz kLQsYGRZxSiRWpBcUJyUnmuYl1quV5yYW1yal66XnJ+7iREcxM+kdjAe3OV+iFGAg1GJh5dj i1SYEGtiWXFl7iFGCQ5mJRHevUHSYUK8KYmVValF+fFFpTmpxYcYpTlYlMR5bxxiCBMSSE8s Sc1OTS1ILYLJMnFwSjUwyjVfYThzqOWE38szSk+WJSsa++0+cdKy60HeU7GnM2xmxOk56heU h9S+e9GWzfeoIozhQXHT/wWn1U5bbphd++qhzYT6www/bVYZOr55mHx91Y0X5xRKBV57BPT9 Wf+m81VHTXC4Cu8ziUePte7amZ9dc1zYsPRXIjDaWFWVRBVEFnOIhOxSYinOSDTUYi4qTgQA n5Vv0V4CAAA= Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 d4f1c74..2285376 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 7de751d..00b4a63 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), -- 2.5.2