From: Chao Yu Subject: [f2fs-dev][PATCH 1/6] f2fs: add a tracepoint for f2fs_write_begin Date: Tue, 06 May 2014 16:46:04 +0800 Message-ID: <004301cf6907$bdd25740$397705c0$@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_write_begin to trace write op of user. Signed-off-by: Chao Yu --- fs/f2fs/data.c | 2 ++ include/trace/events/f2fs.h | 30 ++++++++++++++++++++++++++++++ 2 files changed, 32 insertions(+) diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index a7bb98f..cde0d69 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -900,6 +900,8 @@ static int f2fs_write_begin(struct file *file, struct address_space *mapping, struct dnode_of_data dn; int err = 0; + trace_f2fs_write_begin(inode, pos, len, flags); + f2fs_balance_fs(sbi); repeat: err = f2fs_convert_inline_data(inode, pos + len); diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h index 67f38fa..1e9375a 100644 --- a/include/trace/events/f2fs.h +++ b/include/trace/events/f2fs.h @@ -659,6 +659,36 @@ DEFINE_EVENT_CONDITION(f2fs__submit_bio, f2fs_submit_read_bio, TP_CONDITION(bio) ); +TRACE_EVENT(f2fs_write_begin, + + TP_PROTO(struct inode *inode, loff_t pos, unsigned int len, + unsigned int flags), + + TP_ARGS(inode, pos, len, flags), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(ino_t, ino) + __field(loff_t, pos) + __field(unsigned int, len) + __field(unsigned int, flags) + ), + + TP_fast_assign( + __entry->dev = inode->i_sb->s_dev; + __entry->ino = inode->i_ino; + __entry->pos = pos; + __entry->len = len; + __entry->flags = flags; + ), + + TP_printk("dev = (%d,%d), ino = %lu, pos = %llu, len = %u, flags = %u", + show_dev_ino(__entry), + (unsigned long long)__entry->pos, + __entry->len, + __entry->flags) +); + DECLARE_EVENT_CLASS(f2fs__page, TP_PROTO(struct page *page, int type), -- 1.7.9.5