f2fs: trace elapsed time for node_write lock

Use f2fs_{down,up}_read_trace for node_write to trace lock elapsed time.

Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

Author: chaseyu

fs/f2fs/compress.c

@@ -1309,7 +1309,7 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
 		 * checkpoint. This can only happen to quota writes which can cause
 		 * the below discard race condition.
 		 */
-		f2fs_down_read(&sbi->node_write);
+		f2fs_down_read_trace(&sbi->node_write, &lc);
 	} else if (!f2fs_trylock_op(sbi, &lc)) {
 		goto out_free;
 	}
@@ -1434,7 +1434,7 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
 
 	f2fs_put_dnode(&dn);
 	if (quota_inode)
-		f2fs_up_read(&sbi->node_write);
+		f2fs_up_read_trace(&sbi->node_write, &lc);
 	else
 		f2fs_unlock_op(sbi, &lc);
 
@@ -1463,7 +1463,7 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
 	f2fs_put_dnode(&dn);
 out_unlock_op:
 	if (quota_inode)
-		f2fs_up_read(&sbi->node_write);
+		f2fs_up_read_trace(&sbi->node_write, &lc);
 	else
 		f2fs_unlock_op(sbi, &lc);
 out_free:

fs/f2fs/data.c

@@ -3064,19 +3064,21 @@ int f2fs_write_single_data_page(struct folio *folio, int *submitted,
 write:
 	/* Dentry/quota blocks are controlled by checkpoint */
 	if (S_ISDIR(inode->i_mode) || quota_inode) {
+		struct f2fs_lock_context lc;
+
 		/*
 		 * We need to wait for node_write to avoid block allocation during
 		 * checkpoint. This can only happen to quota writes which can cause
 		 * the below discard race condition.
 		 */
 		if (quota_inode)
-			f2fs_down_read(&sbi->node_write);
+			f2fs_down_read_trace(&sbi->node_write, &lc);
 
 		fio.need_lock = LOCK_DONE;
 		err = f2fs_do_write_data_page(&fio);
 
 		if (quota_inode)
-			f2fs_up_read(&sbi->node_write);
+			f2fs_up_read_trace(&sbi->node_write, &lc);
 
 		goto done;
 	}

fs/f2fs/f2fs.h

@@ -177,6 +177,7 @@ enum f2fs_lock_name {
 	LOCK_NAME_NONE,
 	LOCK_NAME_CP_RWSEM,
 	LOCK_NAME_NODE_CHANGE,
+	LOCK_NAME_NODE_WRITE,
 };
 
 /*

fs/f2fs/node.c

@@ -1738,6 +1738,7 @@ static bool __write_node_folio(struct folio *folio, bool atomic, bool *submitted
 		.io_type = io_type,
 		.io_wbc = wbc,
 	};
+	struct f2fs_lock_context lc;
 	unsigned int seq;
 
 	trace_f2fs_writepage(folio, NODE);
@@ -1767,21 +1768,21 @@ static bool __write_node_folio(struct folio *folio, bool atomic, bool *submitted
 	if (f2fs_get_node_info(sbi, nid, &ni, !do_balance))
 		goto redirty_out;
 
-	f2fs_down_read(&sbi->node_write);
+	f2fs_down_read_trace(&sbi->node_write, &lc);
 
 	/* This page is already truncated */
 	if (unlikely(ni.blk_addr == NULL_ADDR)) {
 		folio_clear_uptodate(folio);
 		dec_page_count(sbi, F2FS_DIRTY_NODES);
-		f2fs_up_read(&sbi->node_write);
+		f2fs_up_read_trace(&sbi->node_write, &lc);
 		folio_unlock(folio);
 		return true;
 	}
 
 	if (__is_valid_data_blkaddr(ni.blk_addr) &&
 		!f2fs_is_valid_blkaddr(sbi, ni.blk_addr,
 					DATA_GENERIC_ENHANCE)) {
-		f2fs_up_read(&sbi->node_write);
+		f2fs_up_read_trace(&sbi->node_write, &lc);
 		goto redirty_out;
 	}
 
@@ -1801,7 +1802,7 @@ static bool __write_node_folio(struct folio *folio, bool atomic, bool *submitted
 	f2fs_do_write_node_page(nid, &fio);
 	set_node_addr(sbi, &ni, fio.new_blkaddr, is_fsync_dnode(folio));
 	dec_page_count(sbi, F2FS_DIRTY_NODES);
-	f2fs_up_read(&sbi->node_write);
+	f2fs_up_read_trace(&sbi->node_write, &lc);
 
 	folio_unlock(folio);
 

fs/f2fs/super.c

@@ -4896,7 +4896,7 @@ static int f2fs_fill_super(struct super_block *sb, struct fs_context *fc)
 	init_f2fs_rwsem(&sbi->gc_lock);
 	mutex_init(&sbi->writepages);
 	init_f2fs_rwsem(&sbi->cp_global_sem);
-	init_f2fs_rwsem(&sbi->node_write);
+	init_f2fs_rwsem_trace(&sbi->node_write, sbi, LOCK_NAME_NODE_WRITE);
 	init_f2fs_rwsem_trace(&sbi->node_change, sbi, LOCK_NAME_NODE_CHANGE);
 	spin_lock_init(&sbi->stat_lock);
 	init_f2fs_rwsem_trace(&sbi->cp_rwsem, sbi, LOCK_NAME_CP_RWSEM);

include/trace/events/f2fs.h

@@ -187,7 +187,8 @@ TRACE_DEFINE_ENUM(CP_PHASE_FINISH_CHECKPOINT);
 #define show_lock_name(lock)						\
 	__print_symbolic(lock,						\
 		{ LOCK_NAME_CP_RWSEM,		"cp_rwsem" },		\
-		{ LOCK_NAME_NODE_CHANGE,	"node_change" })
+		{ LOCK_NAME_NODE_CHANGE,	"node_change" },	\
+		{ LOCK_NAME_NODE_WRITE,		"node_write" })
 
 struct f2fs_sb_info;
 struct f2fs_io_info;