ext4: add some tracepoints in extent status tree
This patch adds some tracepoints in extent status tree.
Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c
index 02c09be..564d981 100644
--- a/fs/ext4/extents_status.c
+++ b/fs/ext4/extents_status.c
@@ -14,6 +14,8 @@
#include "extents_status.h"
#include "ext4_extents.h"
+#include <trace/events/ext4.h>
+
/*
* According to previous discussion in Ext4 Developer Workshop, we
* will introduce a new structure called io tree to track all extent
@@ -224,6 +226,8 @@
struct rb_node *node;
ext4_lblk_t ret = EXT_MAX_BLOCKS;
+ trace_ext4_es_find_extent_enter(inode, es->start);
+
read_lock(&EXT4_I(inode)->i_es_lock);
tree = &EXT4_I(inode)->i_es_tree;
@@ -253,6 +257,8 @@
}
read_unlock(&EXT4_I(inode)->i_es_lock);
+
+ trace_ext4_es_find_extent_exit(inode, es, ret);
return ret;
}
@@ -393,6 +399,7 @@
struct ext4_es_tree *tree;
int err = 0;
+ trace_ext4_es_insert_extent(inode, offset, len);
es_debug("add [%u/%u) to extent status tree of inode %lu\n",
offset, len, inode->i_ino);
@@ -422,6 +429,7 @@
ext4_lblk_t len1, len2, end;
int err = 0;
+ trace_ext4_es_remove_extent(inode, offset, len);
es_debug("remove [%u/%u) from extent status tree of inode %lu\n",
offset, len, inode->i_ino);