linux-kernel - Re: [PATCH 1/2] f2fs: register inodes which is able to donate pages

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Message-ID: <20250114211617.GA2558329@google.com>
Date: Tue, 14 Jan 2025 21:16:17 +0000
From: Eric Biggers <ebiggers@...nel.org>
To: Jaegeuk Kim <jaegeuk@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [PATCH 1/2] f2fs: register inodes which is able to donate pages

On Mon, Jan 13, 2025 at 06:39:32PM +0000, Jaegeuk Kim via Linux-f2fs-devel wrote:
> This patch introduces an inode list to keep the page cache ranges that users
> can donate pages together.
> 
>  #define F2FS_IOC_DONATE_RANGE		_IOW(F2FS_IOCTL_MAGIC, 27,	\
> 						struct f2fs_donate_range)
>  struct f2fs_donate_range {
> 	__u64 start;
> 	__u64 len;
>  };
> 
> e.g., ioctl(F2FS_IOC_DONATE_RANGE, &range);
> 
> Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
> ---
>  fs/f2fs/debug.c           |  3 +++
>  fs/f2fs/f2fs.h            |  9 +++++++-
>  fs/f2fs/file.c            | 48 +++++++++++++++++++++++++++++++++++++++
>  fs/f2fs/inode.c           | 14 ++++++++++++
>  fs/f2fs/super.c           |  1 +
>  include/uapi/linux/f2fs.h |  7 ++++++
>  6 files changed, 81 insertions(+), 1 deletion(-)

Missing a rationale, documentation, tests, and fuzzing.

- Eric