2019-08-15 13:47:13

by Xiaoguang Wang

Subject: [PATCH] jbd2: add missing tracepoint for reserved handle

This issue was found when I use ebpf to trace every jbd2
handle's running info in dioread_nolock case.

Signed-off-by: Xiaoguang Wang <[email protected]>
---
fs/jbd2/transaction.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index 990e7b5062e7..afc06daee5bb 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -569,6 +569,9 @@ int jbd2_journal_start_reserved(handle_t *handle, unsigned int type,
}
handle->h_type = type;
handle->h_line_no = line_no;
+ trace_jbd2_handle_start(journal->j_fs_dev->bd_dev,
+ handle->h_transaction->t_tid, type,
+ line_no, handle->h_buffer_credits);
return 0;
}
EXPORT_SYMBOL(jbd2_journal_start_reserved);
--
2.17.2

2019-08-25 03:13:43

by Theodore Ts'o

Subject: Re: [PATCH] jbd2: add missing tracepoint for reserved handle

On Thu, Aug 15, 2019 at 09:44:46PM +0800, Xiaoguang Wang wrote:
> This issue was found when I use ebpf to trace every jbd2
> handle's running info in dioread_nolock case.
>
> Signed-off-by: Xiaoguang Wang <[email protected]>

Thanks, applied.

- Ted