linux-kernel - Re: [PATCH] f2fs: Fix f2fs_truncate_partial

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Date:   Mon, 6 Mar 2023 18:21:58 +0530
From:   Mukesh Ojha <quic_mojha@...cinc.com>
To:     Douglas RAILLARD <douglas.raillard@....com>,
        Jaegeuk Kim <jaegeuk@...nel.org>, Chao Yu <chao@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        "open list:F2FS FILE SYSTEM" <linux-f2fs-devel@...ts.sourceforge.net>,
        "open list:TRACING" <linux-kernel@...r.kernel.org>,
        "open list:TRACING" <linux-trace-kernel@...r.kernel.org>
Subject: Re: [PATCH] f2fs: Fix f2fs_truncate_partial_nodes ftrace event



On 3/6/2023 5:55 PM, Douglas RAILLARD wrote:
> From: Douglas Raillard <douglas.raillard@....com>
> 
> Fix the nid_t field so that its size is correctly reported in the text
> format embedded in trace.dat files. As it stands, it is reported as
> being of size 4:
> 
>          field:nid_t nid[3];     offset:24;      size:4; signed:0;
> 
> Instead of 12:
> 
>          field:nid_t nid[3];     offset:24;      size:12;        signed:0;
> 
> This also fixes the reported offset of subsequent fields so that they
> match with the actual struct layout.
> 
> 
> Signed-off-by: Douglas Raillard <douglas.raillard@....com>
> ---
>   include/trace/events/f2fs.h | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
> index 31d994e6b4ca..8d053838d6cf 100644
> --- a/include/trace/events/f2fs.h
> +++ b/include/trace/events/f2fs.h
> @@ -512,7 +512,7 @@ TRACE_EVENT(f2fs_truncate_partial_nodes,
>   	TP_STRUCT__entry(
>   		__field(dev_t,	dev)
>   		__field(ino_t,	ino)
> -		__field(nid_t,	nid[3])
> +		__array(nid_t,	nid, 3)


Good catch.

Reviewed-by: Mukesh Ojha <quic_mojha@...cinc.com>

-Mukesh

>   		__field(int,	depth)
>   		__field(int,	err)
>   	),