linux-kernel - Re: [f2fs-dev] [PATCH] f2fs: add fadvise tracepoint

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Message-ID: <81602674-b9f4-4ab2-91f5-0afc762e7cc6@kernel.org>
Date: Wed, 29 Oct 2025 10:06:05 +0800
From: Chao Yu <chao@...nel.org>
To: Jaegeuk Kim <jaegeuk@...nel.org>, linux-kernel@...r.kernel.org,
 linux-f2fs-devel@...ts.sourceforge.net
Cc: chao@...nel.org
Subject: Re: [f2fs-dev] [PATCH] f2fs: add fadvise tracepoint

On 10/29/25 03:54, Jaegeuk Kim via Linux-f2fs-devel wrote:
> This adds a tracepoint in the fadvise call path.
> 
> Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
> ---
>  fs/f2fs/file.c              |  2 ++
>  include/trace/events/f2fs.h | 32 ++++++++++++++++++++++++++++++++
>  2 files changed, 34 insertions(+)
> 
> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> index 6d42e2d28861..4a81089c5df3 100644
> --- a/fs/f2fs/file.c
> +++ b/fs/f2fs/file.c
> @@ -5288,6 +5288,8 @@ static int f2fs_file_fadvise(struct file *filp, loff_t offset, loff_t len,
>  	struct inode *inode = file_inode(filp);
>  	int err;
>  
> +	trace_f2fs_fadvise(inode, offset, len, advice);
> +
>  	if (advice == POSIX_FADV_SEQUENTIAL) {
>  		if (S_ISFIFO(inode->i_mode))
>  			return -ESPIPE;
> diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
> index edbbd869078f..b7f5317b5980 100644
> --- a/include/trace/events/f2fs.h
> +++ b/include/trace/events/f2fs.h
> @@ -586,6 +586,38 @@ TRACE_EVENT(f2fs_file_write_iter,
>  		__entry->ret)
>  );
>  
> +TRACE_EVENT(f2fs_fadvise,
> +
> +	TP_PROTO(struct inode *inode, loff_t offset, loff_t len, int advice),
> +
> +	TP_ARGS(inode, offset, len, advice),
> +
> +	TP_STRUCT__entry(
> +		__field(dev_t,	dev)
> +		__field(ino_t,	ino)
> +		__field(loff_t, size)
> +		__field(loff_t,	offset)
> +		__field(loff_t,	len)
> +		__field(int,	advice)
> +	),
> +
> +	TP_fast_assign(
> +		__entry->dev	= inode->i_sb->s_dev;
> +		__entry->ino	= inode->i_ino;
> +		__entry->size	= inode->i_size;

__entry->size = i_size_read(inode)?

Thanks,

> +		__entry->offset	= offset;
> +		__entry->len	= len;
> +		__entry->advice	= advice;
> +	),
> +
> +	TP_printk("dev = (%d,%d), ino = %lu, i_size = %lld offset:%llu, len:%llu, advise:%d",
> +		show_dev_ino(__entry),
> +		(unsigned long long)__entry->size,
> +		__entry->offset,
> +		__entry->len,
> +		__entry->advice)
> +);
> +
>  TRACE_EVENT(f2fs_map_blocks,
>  	TP_PROTO(struct inode *inode, struct f2fs_map_blocks *map, int flag,
>  		 int ret),