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Message-Id: <20221008120518.74870-1-changfengnan@bytedance.com>
Date: Sat, 8 Oct 2022 20:05:18 +0800
From: changfengnan <changfengnan@...edance.com>
To: tytso@....edu, adilger.kernel@...ger.ca
Cc: linux-ext4@...r.kernel.org,
changfengnan <changfengnan@...edance.com>
Subject: [PATCH] ext4: split ext4_journal_start trace for debug
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@...edance.com>
---
fs/ext4/ext4_jbd2.c | 14 ++++++---
fs/ext4/ext4_jbd2.h | 10 +++----
fs/ext4/ialloc.c | 4 +--
include/trace/events/ext4.h | 57 ++++++++++++++++++++++++++++++-------
4 files changed, 63 insertions(+), 22 deletions(-)
diff --git a/fs/ext4/ext4_jbd2.c b/fs/ext4/ext4_jbd2.c
index 0fd0c42a4f7d..50651aad988b 100644
--- a/fs/ext4/ext4_jbd2.c
+++ b/fs/ext4/ext4_jbd2.c
@@ -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);
diff --git a/fs/ext4/ext4_jbd2.h b/fs/ext4/ext4_jbd2.h
index 00dc668e052b..5693f1edd63c 100644
--- a/fs/ext4/ext4_jbd2.h
+++ b/fs/ext4/ext4_jbd2.h
@@ -263,9 +263,9 @@ int __ext4_handle_dirty_super(const char *where, unsigned int line,
#define ext4_handle_dirty_super(handle, sb) \
__ext4_handle_dirty_super(__func__, __LINE__, (handle), (sb))
-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)
@@ -305,7 +305,7 @@ 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) \
@@ -325,7 +325,7 @@ 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);
}
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index b215c564bc31..5951899fd7ec 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -1073,8 +1073,8 @@ struct inode *__ext4_new_inode(handle_t *handle, struct inode *dir,
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);
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index b14314fcf732..33e36c4c58e4 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -1795,18 +1795,19 @@ 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(
@@ -1815,11 +1816,45 @@ 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,"
+ " 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, "
- "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, 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)
);
--
2.32.1 (Apple Git-133)
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