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ext4: split ext4_journal_start trace for debug

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we might want to know why jbd2 thread using high io for detail,
split ext4_journal_start trace to ext4_journal_start_sb and
ext4_journal_start_inode, show ino and handle type when possible.

Signed-off-by: changfengnan <changfengnan@bytedance.com>
Link: https://lore.kernel.org/r/20221008120518.74870-1-changfengnan@bytedance.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
changfengnan 2022-10-08 20:05:18 +08:00 committed by Theodore Ts'o
parent e3ea75ee65
commit 5f3e240321
4 changed files with 63 additions and 22 deletions
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14
fs/ext4/ext4_jbd2.c
View File

@ -86,15 +86,21 @@ static int ext4_journal_check_start(struct super_block *sb)
return 0;
}
handle_t *__ext4_journal_start_sb(struct super_block *sb, unsigned int line,
handle_t *__ext4_journal_start_sb(struct inode *inode,
struct super_block *sb, unsigned int line,
int type, int blocks, int rsv_blocks,
int revoke_creds)
{
journal_t *journal;
int err;
trace_ext4_journal_start(sb, blocks, rsv_blocks, revoke_creds,
_RET_IP_);
if (inode)
trace_ext4_journal_start_inode(inode, blocks, rsv_blocks,
revoke_creds, type,
_RET_IP_);
else
trace_ext4_journal_start_sb(sb, blocks, rsv_blocks,
revoke_creds, type,
_RET_IP_);
err = ext4_journal_check_start(sb);
if (err < 0)
return ERR_PTR(err);

10
fs/ext4/ext4_jbd2.h
View File

@ -261,9 +261,9 @@ int __ext4_handle_dirty_metadata(const char *where, unsigned int line,
__ext4_handle_dirty_metadata(__func__, __LINE__, (handle), (inode), \
(bh))
handle_t *__ext4_journal_start_sb(struct super_block *sb, unsigned int line,
int type, int blocks, int rsv_blocks,
int revoke_creds);
handle_t *__ext4_journal_start_sb(struct inode *inode, struct super_block *sb,
unsigned int line, int type, int blocks,
int rsv_blocks, int revoke_creds);
int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle);
#define EXT4_NOJOURNAL_MAX_REF_COUNT ((unsigned long) 4096)
@ -303,7 +303,7 @@ static inline int ext4_trans_default_revoke_credits(struct super_block *sb)
}
#define ext4_journal_start_sb(sb, type, nblocks) \
__ext4_journal_start_sb((sb), __LINE__, (type), (nblocks), 0, \
__ext4_journal_start_sb(NULL, (sb), __LINE__, (type), (nblocks), 0,\
ext4_trans_default_revoke_credits(sb))
#define ext4_journal_start(inode, type, nblocks) \
@ -323,7 +323,7 @@ static inline handle_t *__ext4_journal_start(struct inode *inode,
int blocks, int rsv_blocks,
int revoke_creds)
{
return __ext4_journal_start_sb(inode->i_sb, line, type, blocks,
return __ext4_journal_start_sb(inode, inode->i_sb, line, type, blocks,
rsv_blocks, revoke_creds);
}

4
fs/ext4/ialloc.c
View File

@ -1076,8 +1076,8 @@ struct inode *__ext4_new_inode(struct user_namespace *mnt_userns,
if ((!(sbi->s_mount_state & EXT4_FC_REPLAY)) && !handle) {
BUG_ON(nblocks <= 0);
handle = __ext4_journal_start_sb(dir->i_sb, line_no,
handle_type, nblocks, 0,
handle = __ext4_journal_start_sb(NULL, dir->i_sb,
line_no, handle_type, nblocks, 0,
ext4_trans_default_revoke_credits(sb));
if (IS_ERR(handle)) {
err = PTR_ERR(handle);

57
include/trace/events/ext4.h
View File

@ -1744,18 +1744,19 @@ TRACE_EVENT(ext4_load_inode,
(unsigned long) __entry->ino)
);
TRACE_EVENT(ext4_journal_start,
TRACE_EVENT(ext4_journal_start_sb,
TP_PROTO(struct super_block *sb, int blocks, int rsv_blocks,
int revoke_creds, unsigned long IP),
int revoke_creds, int type, unsigned long IP),
TP_ARGS(sb, blocks, rsv_blocks, revoke_creds, IP),
TP_ARGS(sb, blocks, rsv_blocks, revoke_creds, type, IP),
TP_STRUCT__entry(
__field( dev_t, dev )
__field(unsigned long, ip )
__field( int, blocks )
__field( int, rsv_blocks )
__field( int, revoke_creds )
__field( dev_t, dev )
__field( unsigned long, ip )
__field( int, blocks )
__field( int, rsv_blocks )
__field( int, revoke_creds )
__field( int, type )
),
TP_fast_assign(
@ -1764,11 +1765,45 @@ TRACE_EVENT(ext4_journal_start,
__entry->blocks = blocks;
__entry->rsv_blocks = rsv_blocks;
__entry->revoke_creds = revoke_creds;
__entry->type = type;
),
TP_printk("dev %d,%d blocks %d, rsv_blocks %d, revoke_creds %d, "
"caller %pS", MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->blocks, __entry->rsv_blocks, __entry->revoke_creds,
TP_printk("dev %d,%d blocks %d, rsv_blocks %d, revoke_creds %d,"
" type %d, caller %pS", MAJOR(__entry->dev),
MINOR(__entry->dev), __entry->blocks, __entry->rsv_blocks,
__entry->revoke_creds, __entry->type, (void *)__entry->ip)
);
TRACE_EVENT(ext4_journal_start_inode,
TP_PROTO(struct inode *inode, int blocks, int rsv_blocks,
int revoke_creds, int type, unsigned long IP),
TP_ARGS(inode, blocks, rsv_blocks, revoke_creds, type, IP),
TP_STRUCT__entry(
__field( unsigned long, ino )
__field( dev_t, dev )
__field( unsigned long, ip )
__field( int, blocks )
__field( int, rsv_blocks )
__field( int, revoke_creds )
__field( int, type )
),
TP_fast_assign(
__entry->dev = inode->i_sb->s_dev;
__entry->ip = IP;
__entry->blocks = blocks;
__entry->rsv_blocks = rsv_blocks;
__entry->revoke_creds = revoke_creds;
__entry->type = type;
__entry->ino = inode->i_ino;
),
TP_printk("dev %d,%d blocks %d, rsv_blocks %d, revoke_creds %d,"
" type %d, ino %lu, caller %pS", MAJOR(__entry->dev),
MINOR(__entry->dev), __entry->blocks, __entry->rsv_blocks,
__entry->revoke_creds, __entry->type, __entry->ino,
(void *)__entry->ip)
);