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Aivazian" , David Sterba , OGAWA Hirofumi , Muchun Song , Oscar Salvador , David Hildenbrand , linux-mm@kvack.org, linux-aio@kvack.org, Benjamin LaHaise , Jan Kara Subject: [PATCH v2 0/41] fs: Move metadata bh tracking from address_space Date: Fri, 20 Mar 2026 14:40:55 +0100 Message-ID: <20260320131728.6449-1-jack@suse.cz> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=3705; i=jack@suse.cz; h=from:subject:message-id; bh=y6WPXhW4cDJwB9kwDgAQyXGA/gUvqttY8DQs+1VHgDU=; b=owGbwMvMwME4Z+4qdvsUh5uMp9WSGDL3+qUxbG63YdnZY3I2/8ukT1OLL3KdmtUmWbxfy3Ou+ zEXw1+lnYzGLAyMHAyyYoosqyMval+bZ9S1NVRDBmYQKxPYFC5OAbiIOwfDDTaD6HZ9hcvZqnsZ ZDTtopo9beJSL0UyWs9x1H/6klVH/bLzspPbN1q9OnV7BnOvZZwYK6dj4VKePTW/3/hd/rXy0tc fR+cnl4ak1SukvpwwLaIj2J/htOfH8LlK3HNET+0J+zAt/HL5p1ie70uWMafxyXPPCzny9oym+V nXzwsKA12cGLfdWXZA5JrG+8qfNms++BVP7vR2+X55TUmonuTL+p7Lp/RqD7E0GibKXjirUnxSn 6lU6V3XiZMmKobXuGo/5glY3XYLPyIz2WniPu+DWzwjnyUZfbs02eBRnFCF3zI2z7g0ye5jn82O Oc7YeXzy2eXH3ZYZi9w9tfGjzrxJJg7LdBWD75VNbi4AAA== X-Developer-Key: i=jack@suse.cz; a=openpgp; fpr=93C6099A142276A28BBE35D815BC833443038D8C Content-Transfer-Encoding: 8bit X-Spamd-Result: default: False [-1.30 / 50.00]; BAYES_HAM(-3.00)[100.00%]; SUSPICIOUS_RECIPS(1.50)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MID_CONTAINS_FROM(1.00)[]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-0.999]; MIME_GOOD(-0.10)[text/plain]; RCVD_TLS_LAST(0.00)[]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FREEMAIL_CC(0.00)[vger.kernel.org,kernel.org,ZenIV.linux.org.uk,mit.edu,gmail.com,suse.com,mail.parknet.co.jp,linux.dev,suse.de,kvack.org,suse.cz]; RCPT_COUNT_TWELVE(0.00)[16]; MIME_TRACE(0.00)[0:+]; TO_MATCH_ENVRCPT_ALL(0.00)[]; TAGGED_RCPT(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.cz:mid,imap1.dmz-prg2.suse.org:helo]; FROM_HAS_DN(0.00)[]; DKIM_SIGNED(0.00)[suse.cz:s=susede2_rsa,suse.cz:s=susede2_ed25519]; RCVD_COUNT_THREE(0.00)[3]; TO_DN_SOME(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com] X-Spam-Flag: NO X-Spam-Score: -1.30 X-Spam-Level: Hello, here is a next revision of the patchset cleaning up buffer head metadata tracking and use of address_space's private_list and private_lock. The patches have survived some testing with fstests and ltp however I didn't test AFFS and KVM guest_memfd changes so a help with testing those would be very welcome. Thanks. Changes since v1: * Fixed hugetlbfs handling of root directory * Reworked mapping_metadata_bhs handling functions to get the tracking structure as an argument so we now don't need iops method to fetch the struct from the inode * Reordered patches into more sensible order * Added patch to merge two mostly duplicate generic fsync implementations * Added Reviewed-by tags * Couple more minor changes that were requested during review Original cover letter: this patch series cleans up the mess that has accumulated over the years in metadata buffer_head tracking for inodes, moves the tracking into dedicated structure in filesystem-private part of the inode (so that we don't use private_list, private_data, and private_lock in struct address_space), and also moves couple other users of private_data and private_list so these are removed from struct address_space saving 3 longs in struct inode for 99% of inodes. I would like to get rid of private_lock in struct address_space as well however the locking changes for buffer_heads are non-trivial there and the patch series is long enough as is. So let's leave that for another time. block/bdev.c | 1 fs/affs/affs.h | 2 fs/affs/dir.c | 1 fs/affs/file.c | 1 fs/affs/inode.c | 2 fs/affs/super.c | 6 fs/affs/symlink.c | 1 fs/aio.c | 78 +++++++- fs/bfs/bfs.h | 2 fs/bfs/dir.c | 1 fs/bfs/file.c | 4 fs/bfs/inode.c | 9 + fs/buffer.c | 387 +++++++++++++++++--------------------------- fs/ext2/ext2.h | 2 fs/ext2/file.c | 1 fs/ext2/inode.c | 3 fs/ext2/namei.c | 2 fs/ext2/super.c | 6 fs/ext2/symlink.c | 2 fs/ext4/ext4.h | 4 fs/ext4/file.c | 1 fs/ext4/inode.c | 9 - fs/ext4/namei.c | 2 fs/ext4/super.c | 9 - fs/ext4/symlink.c | 3 fs/fat/fat.h | 2 fs/fat/file.c | 1 fs/fat/inode.c | 16 + fs/fat/namei_msdos.c | 1 fs/fat/namei_vfat.c | 1 fs/gfs2/glock.c | 1 fs/hugetlbfs/inode.c | 10 - fs/inode.c | 24 +- fs/minix/file.c | 1 fs/minix/inode.c | 10 + fs/minix/minix.h | 2 fs/minix/namei.c | 1 fs/ntfs3/file.c | 3 fs/ocfs2/dlmglue.c | 1 fs/ocfs2/namei.c | 3 fs/udf/file.c | 1 fs/udf/inode.c | 2 fs/udf/namei.c | 1 fs/udf/super.c | 6 fs/udf/symlink.c | 1 fs/udf/udf_i.h | 1 fs/udf/udfdecl.h | 1 include/linux/buffer_head.h | 6 include/linux/fs.h | 11 - include/linux/hugetlb.h | 1 mm/hugetlb.c | 10 - virt/kvm/guest_memfd.c | 12 - 52 files changed, 360 insertions(+), 309 deletions(-) Honza Previous versions: Link: http://lore.kernel.org/r/20260303101717.27224-1-jack@suse.cz # v1