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| author | Theodore Ts'o <tytso@mit.edu> | 2011-07-10 22:37:50 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2011-07-10 22:37:50 -0400 |
| commit | 12706394bcaa48e3d5e19c97d7b4e5683ebb12fb (patch) | |
| tree | d2a9effccf0162de6b783cf40fadd0f27c1bd22e | |
| parent | 4862fd6047ed02e2726667c54d35f538eecc56aa (diff) | |
| download | linux-stable-12706394bcaa48e3d5e19c97d7b4e5683ebb12fb.tar.gz linux-stable-12706394bcaa48e3d5e19c97d7b4e5683ebb12fb.tar.bz2 linux-stable-12706394bcaa48e3d5e19c97d7b4e5683ebb12fb.zip | |
ext4: add tracepoint for ext4_journal_start
This will help debug who is responsible for starting a jbd2 transaction.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| -rw-r--r-- | fs/ext4/super.c | 1 | ||||
| -rw-r--r-- | include/trace/events/ext4.h | 22 |
2 files changed, 23 insertions, 0 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 9ea71aa864b3..7910e61809e7 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -269,6 +269,7 @@ handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) journal_t *journal; handle_t *handle; + trace_ext4_journal_start(sb, nblocks, _RET_IP_); if (sb->s_flags & MS_RDONLY) return ERR_PTR(-EROFS); diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h index 5ce2b2f5f524..6f27a59fc90d 100644 --- a/include/trace/events/ext4.h +++ b/include/trace/events/ext4.h @@ -1520,6 +1520,28 @@ TRACE_EVENT(ext4_load_inode, (unsigned long) __entry->ino) ); +TRACE_EVENT(ext4_journal_start, + TP_PROTO(struct super_block *sb, int nblocks, unsigned long IP), + + TP_ARGS(sb, nblocks, IP), + + TP_STRUCT__entry( + __field( dev_t, dev ) + __field( int, nblocks ) + __field(unsigned long, ip ) + ), + + TP_fast_assign( + __entry->dev = sb->s_dev; + __entry->nblocks = nblocks; + __entry->ip = IP; + ), + + TP_printk("dev %d,%d nblocks %d caller %pF", + MAJOR(__entry->dev), MINOR(__entry->dev), + __entry->nblocks, (void *)__entry->ip) +); + #endif /* _TRACE_EXT4_H */ /* This part must be outside protection */ |