linux-kernel - [PATCH 0/2 v4] add ioctl/sysfs to donate file-backed pages

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Message-ID: <20250116044245.1995715-1-jaegeuk@kernel.org>
Date: Thu, 16 Jan 2025 04:41:59 +0000
From: Jaegeuk Kim <jaegeuk@...nel.org>
To: linux-kernel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net
Cc: Jaegeuk Kim <jaegeuk@...nel.org>
Subject: [PATCH 0/2 v4] add ioctl/sysfs to donate file-backed pages

If users clearly know which file-backed pages to reclaim in system view, they
can use this ioctl() to register in advance and reclaim all at once later.

Change log from v3:
 - cover partial range

Change log from v2:
 - add more boundary checks
 - de-register the range, if len is zero

Jaegeuk Kim (2):
  f2fs: register inodes which is able to donate pages
  f2fs: add a sysfs entry to request donate file-backed pages

 Documentation/ABI/testing/sysfs-fs-f2fs |  7 +++
 fs/f2fs/debug.c                         |  3 ++
 fs/f2fs/f2fs.h                          | 14 +++++-
 fs/f2fs/file.c                          | 65 +++++++++++++++++++++++++
 fs/f2fs/inode.c                         | 14 ++++++
 fs/f2fs/shrinker.c                      | 27 ++++++++++
 fs/f2fs/super.c                         |  1 +
 fs/f2fs/sysfs.c                         |  8 +++
 include/uapi/linux/f2fs.h               |  7 +++
 9 files changed, 145 insertions(+), 1 deletion(-)

-- 
2.48.0.rc2.279.g1de40edade-goog