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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>
This commit is contained in:
Zheng Liu 2012-11-08 21:57:33 -05:00 committed by Theodore Ts'o
parent 51865fda28
commit 992e9fdd7b
2 changed files with 109 additions and 0 deletions
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8
fs/ext4/extents_status.c
View File

@ -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 @@ ext4_lblk_t ext4_es_find_extent(struct inode *inode, struct extent_status *es)
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 @@ ext4_lblk_t ext4_es_find_extent(struct inode *inode, struct extent_status *es)
}
read_unlock(&EXT4_I(inode)->i_es_lock);
trace_ext4_es_find_extent_exit(inode, es, ret);
return ret;
}
@ -393,6 +399,7 @@ int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t offset,
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 @@ int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t offset,
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);

101
include/trace/events/ext4.h
View File

@ -15,6 +15,7 @@ struct ext4_inode_info;
struct mpage_da_data;
struct ext4_map_blocks;
struct ext4_extent;
struct extent_status;
#define EXT4_I(inode) (container_of(inode, struct ext4_inode_info, vfs_inode))
@ -2054,6 +2055,106 @@ TRACE_EVENT(ext4_ext_remove_space_done,
(unsigned short) __entry->eh_entries)
);
TRACE_EVENT(ext4_es_insert_extent,
TP_PROTO(struct inode *inode, ext4_lblk_t start, ext4_lblk_t len),
TP_ARGS(inode, start, len),
TP_STRUCT__entry(
__field( dev_t, dev )
__field( ino_t, ino )
__field( loff_t, start )
__field( loff_t, len )
),
TP_fast_assign(
__entry->dev = inode->i_sb->s_dev;
__entry->ino = inode->i_ino;
__entry->start = start;
__entry->len = len;
),
TP_printk("dev %d,%d ino %lu es [%lld/%lld)",
MAJOR(__entry->dev), MINOR(__entry->dev),
(unsigned long) __entry->ino,
__entry->start, __entry->len)
);
TRACE_EVENT(ext4_es_remove_extent,
TP_PROTO(struct inode *inode, ext4_lblk_t start, ext4_lblk_t len),
TP_ARGS(inode, start, len),
TP_STRUCT__entry(
__field( dev_t, dev )
__field( ino_t, ino )
__field( loff_t, start )
__field( loff_t, len )
),
TP_fast_assign(
__entry->dev = inode->i_sb->s_dev;
__entry->ino = inode->i_ino;
__entry->start = start;
__entry->len = len;
),
TP_printk("dev %d,%d ino %lu es [%lld/%lld)",
MAJOR(__entry->dev), MINOR(__entry->dev),
(unsigned long) __entry->ino,
__entry->start, __entry->len)
);
TRACE_EVENT(ext4_es_find_extent_enter,
TP_PROTO(struct inode *inode, ext4_lblk_t start),
TP_ARGS(inode, start),
TP_STRUCT__entry(
__field( dev_t, dev )
__field( ino_t, ino )
__field( ext4_lblk_t, start )
),
TP_fast_assign(
__entry->dev = inode->i_sb->s_dev;
__entry->ino = inode->i_ino;
__entry->start = start;
),
TP_printk("dev %d,%d ino %lu start %u",
MAJOR(__entry->dev), MINOR(__entry->dev),
(unsigned long) __entry->ino, __entry->start)
);
TRACE_EVENT(ext4_es_find_extent_exit,
TP_PROTO(struct inode *inode, struct extent_status *es,
ext4_lblk_t ret),
TP_ARGS(inode, es, ret),
TP_STRUCT__entry(
__field( dev_t, dev )
__field( ino_t, ino )
__field( ext4_lblk_t, start )
__field( ext4_lblk_t, len )
__field( ext4_lblk_t, ret )
),
TP_fast_assign(
__entry->dev = inode->i_sb->s_dev;
__entry->ino = inode->i_ino;
__entry->start = es->start;
__entry->len = es->len;
__entry->ret = ret;
),
TP_printk("dev %d,%d ino %lu es [%u/%u) ret %u",
MAJOR(__entry->dev), MINOR(__entry->dev),
(unsigned long) __entry->ino,
__entry->start, __entry->len, __entry->ret)
);
#endif /* _TRACE_EXT4_H */
/* This part must be outside protection */