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Fri, 20 Mar 2026 13:41:44 +0000 Received: by quack3.suse.cz (Postfix, from userid 1000) id 54360A0A81; Fri, 20 Mar 2026 14:41:44 +0100 (CET) From: Jan Kara To: Cc: , Christian Brauner , Al Viro , , Ted Tso , "Tigran A. 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 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-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 70DB1180015 X-Stat-Signature: whquhqogi9o9hysfewmod4ootwcc3iny X-Rspam-User: X-HE-Tag: 1774014106-307393 X-HE-Meta: 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 zp+IANkb +RsK2wiC+gzdFWs9nuxBwwEk2FWFsqFCy5ddFtg4uvwIpu1+nzeu02+C51TjerQeJ6ukuC+2Pq43vjmUFf7nv1tCT415dnJ/AdDzRgfIHoF8cnVzsM8Ui4YgT5ni+BXGmd2GeeMEvcuPrm24hZZLtq5T44BmaSbIO3DFjUx2nO5bvpjR1INoEE6Yl2acwxNoIiW6Tx7NkJvqDE0alU1xSfUSIkvWl/Tjb104PhOV904H5Db9F4NjOezX56X/GQ7ihQiRUrFgPiDaHRyXw8YHoTlZyBqk3O2W8jEN7vdVjTsoJ4nYxZxaYofVkMFhKGAVQj3B6qbKy2U7VGQBBmUQ+oHNaS/Zt2SGLoJpcjoiMxuCDJD0vjsOu5pi+0WnrKGp3Ste/ Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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