linux-kernel - [f2fs-dev] [PATCH 1/2] f2fs: adds a tracepoint for submit_read

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Date:	Wed, 20 Nov 2013 16:40:10 +0800
From:	Chao Yu <chao2.yu@...sung.com>
To:	??? <jaegeuk.kim@...sung.com>
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net,
	谭姝 <shu.tan@...sung.com>
Subject: [f2fs-dev] [PATCH 1/2] f2fs: adds a tracepoint for submit_read_page

This patch adds a tracepoint for submit_read_page.

Signed-off-by: Chao Yu <chao2.yu@...sung.com>
---
 fs/f2fs/data.c              |    1 +
 include/trace/events/f2fs.h |   30 ++++++++++++++++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 9cf3f6c..0ca93be 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -448,6 +448,7 @@ alloc_new:
 	io->last_block_in_bio = blk_addr;
 
 	mutex_unlock(&io->io_mutex);
+	trace_f2fs_submit_read_page(page, blk_addr, rw);
 }
 
 /*
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index e0dc355..571f39a 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -453,6 +453,36 @@ TRACE_EVENT_CONDITION(f2fs_readpage,
 		show_bio_type(__entry->type))
 );
 
+TRACE_EVENT(f2fs_submit_read_page,
+
+	TP_PROTO(struct page *page, block_t blk_addr, int rw),
+
+	TP_ARGS(page, blk_addr, rw),
+
+	TP_STRUCT__entry(
+		__field(dev_t,	dev)
+		__field(ino_t,	ino)
+		__field(int, rw)
+		__field(pgoff_t, index)
+		__field(block_t, block)
+	),
+
+	TP_fast_assign(
+		__entry->dev	= page->mapping->host->i_sb->s_dev;
+		__entry->ino	= page->mapping->host->i_ino;
+		__entry->rw	= rw;
+		__entry->index	= page->index;
+		__entry->block	= blk_addr;
+	),
+
+	TP_printk("dev = (%d,%d), ino = %lu, bio_type = %s, "
+		"index = %lu, blkaddr = 0x%llx",
+		show_dev_ino(__entry),
+		show_bio_type(__entry->rw),
+		(unsigned long)__entry->index,
+		(unsigned long long)__entry->block)
+);
+
 TRACE_EVENT(f2fs_get_data_block,
 	TP_PROTO(struct inode *inode, sector_t iblock,
 				struct buffer_head *bh, int ret),
-- 
1.7.9.5

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