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{ "id": 2216302, "url": "http://patchwork.ozlabs.org/api/covers/2216302/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/cover/20260326082428.31660-1-jack@suse.cz/", "project": { "id": 8, "url": "http://patchwork.ozlabs.org/api/projects/8/?format=api", "name": "Linux ext4 filesystem development", "link_name": "linux-ext4", "list_id": "linux-ext4.vger.kernel.org", "list_email": "linux-ext4@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260326082428.31660-1-jack@suse.cz>", "list_archive_url": null, "date": "2026-03-26T09:53:54", "name": "[v3,0/42] fs: Move metadata bh tracking from address_space", "submitter": { "id": 363, "url": "http://patchwork.ozlabs.org/api/people/363/?format=api", "name": "Jan Kara", "email": "jack@suse.cz" }, "mbox": "http://patchwork.ozlabs.org/project/linux-ext4/cover/20260326082428.31660-1-jack@suse.cz/mbox/", "series": [ { "id": 497561, "url": "http://patchwork.ozlabs.org/api/series/497561/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/list/?series=497561", "date": "2026-03-26T09:53:55", "name": "fs: Move metadata bh tracking from address_space", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/497561/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/covers/2216302/comments/", "headers": { "Return-Path": "\n <SRS0=6PgN=B2=vger.kernel.org=linux-ext4+bounces-15398-patchwork-incoming=ozlabs.org@ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-ext4@vger.kernel.org" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "patchwork-incoming@ozlabs.org" ], "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=suse.cz header.i=@suse.cz header.a=rsa-sha256\n header.s=susede2_rsa header.b=mMw9FFYi;\n\tdkim=pass header.d=suse.cz header.i=@suse.cz header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=mxnNgLTD;\n\tdkim=pass (1024-bit key) header.d=suse.cz header.i=@suse.cz\n header.a=rsa-sha256 header.s=susede2_rsa header.b=mMw9FFYi;\n\tdkim=neutral header.d=suse.cz header.i=@suse.cz header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=mxnNgLTD;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=ozlabs.org\n (client-ip=2404:9400:2221:ea00::3; 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a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz;\n\ts=susede2_ed25519; t=1774518896;\n\th=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc:\n\t mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding;\n\tbh=aRkR63p1jpFA0esSQKuE1SlJEZWNddmmmMLZ5RvIZyY=;\n\tb=mxnNgLTDh78L6iaUILUrTIWzmlO0FdM/XohW5IMysSSlwlXT+3PbizvPRt0y30KMYRyFzS\n\taudeizPvgreVrhAA==", "v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz;\n s=susede2_rsa;\n\tt=1774518896;\n h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc:\n\t mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding;\n\tbh=aRkR63p1jpFA0esSQKuE1SlJEZWNddmmmMLZ5RvIZyY=;\n\tb=mMw9FFYiJgTxvm2jOoucSvEKz2U7CWOrgzoVrYMEGvgYO0FGfAB2yFocxUaY+FxiEi4+sm\n\tfiNUs6Vwt3Yf25EW3iASny5GWdj+U/7+jMxHQxUIincKucdzTko0bFAcmnNJ8fP8Enhsb9\n\tyYtmoNsJNWG1SfV6u+1nH/K2lxYQ+Wo=", "v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz;\n\ts=susede2_ed25519; t=1774518896;\n\th=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc:\n\t mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding;\n\tbh=aRkR63p1jpFA0esSQKuE1SlJEZWNddmmmMLZ5RvIZyY=;\n\tb=mxnNgLTDh78L6iaUILUrTIWzmlO0FdM/XohW5IMysSSlwlXT+3PbizvPRt0y30KMYRyFzS\n\taudeizPvgreVrhAA==" ], "From": "Jan Kara <jack@suse.cz>", "To": "<linux-fsdevel@vger.kernel.org>", "Cc": "<linux-block@vger.kernel.org>,\n\tChristian Brauner <brauner@kernel.org>,\n\tAl Viro <viro@ZenIV.linux.org.uk>,\n\t<linux-ext4@vger.kernel.org>,\n\tTed Tso <tytso@mit.edu>,\n\t\"Tigran A. Aivazian\" <aivazian.tigran@gmail.com>,\n\tDavid Sterba <dsterba@suse.com>,\n\tOGAWA Hirofumi <hirofumi@mail.parknet.co.jp>,\n\tMuchun Song <muchun.song@linux.dev>,\n\tOscar Salvador <osalvador@suse.de>,\n\tDavid Hildenbrand <david@kernel.org>,\n\tlinux-mm@kvack.org,\n\tlinux-aio@kvack.org,\n\tBenjamin LaHaise <bcrl@kvack.org>,\n\tJan Kara <jack@suse.cz>", "Subject": "[PATCH v3 0/42] fs: Move metadata bh tracking from address_space", "Date": "Thu, 26 Mar 2026 10:53:54 +0100", "Message-ID": "<20260326082428.31660-1-jack@suse.cz>", "X-Mailer": "git-send-email 2.51.0", "Precedence": "bulk", "X-Mailing-List": "linux-ext4@vger.kernel.org", "List-Id": "<linux-ext4.vger.kernel.org>", "List-Subscribe": "<mailto:linux-ext4+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-ext4+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "X-Developer-Signature": "v=1; a=openpgp-sha256; l=4261; i=jack@suse.cz;\n h=from:subject:message-id; bh=OcbPNXnG/ezx6KsPDRBMMef9MCYy/KlpWJbDBHz3UEY=;\n b=owEBbQGS/pANAwAIAZydqgc/ZEDZAcsmYgBpxQIxTA34/xtU7IgqXiNrsxzCFcUYmjrIjwuOu\n RDjeyFNXc6JATMEAAEIAB0WIQSrWdEr1p4yirVVKBycnaoHP2RA2QUCacUCMQAKCRCcnaoHP2RA\n 2flRCADUBXWyzZCdBg87axquExTTc4wlsGjblaPAMJfU3zifFLDeVwWmLLmik7Pj8xaFEGkNv5c\n 7NcDloLN9y1e16RUdr3IuzqynO9S5A0uYJo6eXgwpuhZPSlqFBmpTwTCuPPQ1xzrctDqN/mUqc9\n w6L1SNBE+z+S4V3uxEtqURRIo08bTJqMh0K7XajYSiscBEVomuwoFqhHlTzN6utd6Vee57pZBRU\n 1EQUCunm6C7HIkc5q63JnTAZnFz60X5t1BwDoxjkebaad2qFmmf1hIRpFn0/zB8u2Yxw5IdNCWN\n 9OLAVCh8JXchU1pisDLogFOi+h50+5jyFV+M3wstbDEipslp", "X-Developer-Key": "i=jack@suse.cz; a=openpgp;\n fpr=93C6099A142276A28BBE35D815BC833443038D8C", "Content-Transfer-Encoding": "8bit", "X-Spamd-Result": "default: False [-1.51 / 50.00];\n\tBAYES_HAM(-3.00)[100.00%];\n\tSUSPICIOUS_RECIPS(1.50)[];\n\tMID_CONTAINS_FROM(1.00)[];\n\tNEURAL_HAM_LONG(-1.00)[-1.000];\n\tR_MISSING_CHARSET(0.50)[];\n\tNEURAL_HAM_SHORT(-0.20)[-1.000];\n\tR_DKIM_ALLOW(-0.20)[suse.cz:s=susede2_rsa,suse.cz:s=susede2_ed25519];\n\tMIME_GOOD(-0.10)[text/plain];\n\tMX_GOOD(-0.01)[];\n\tDBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,imap1.dmz-prg2.suse.org:rdns];\n\tRCVD_COUNT_THREE(0.00)[3];\n\tDKIM_SIGNED(0.00)[suse.cz:s=susede2_rsa,suse.cz:s=susede2_ed25519];\n\tFUZZY_RATELIMITED(0.00)[rspamd.com];\n\tRBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from];\n\tMIME_TRACE(0.00)[0:+];\n\tARC_NA(0.00)[];\n\tRCPT_COUNT_TWELVE(0.00)[16];\n\tRCVD_TLS_LAST(0.00)[];\n\tTO_MATCH_ENVRCPT_ALL(0.00)[];\n\tFROM_HAS_DN(0.00)[];\n\tRCVD_VIA_SMTP_AUTH(0.00)[];\n\tTAGGED_RCPT(0.00)[];\n\tRECEIVED_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:106:10:150:64:167:received];\n\tSPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:97:from];\n\tDKIM_TRACE(0.00)[suse.cz:+];\n\tFROM_EQ_ENVFROM(0.00)[];\n\tFREEMAIL_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];\n\tTO_DN_SOME(0.00)[];\n\tFREEMAIL_ENVRCPT(0.00)[gmail.com]", "X-Rspamd-Action": "no action", "X-Spam-Score": "-1.51", "X-Spam-Level": "", "X-Rspamd-Server": "rspamd1.dmz-prg2.suse.org", "X-Rspamd-Queue-Id": "D268A4D279", "X-Spam-Status": "No, score=-1.2 required=5.0 tests=ARC_SIGNED,ARC_VALID,\n\tDKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DMARC_MISSING,\n\tHEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,\n\tSPF_PASS autolearn=disabled version=4.0.1", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on gandalf.ozlabs.org" }, "content": "Hello,\n\nhere is a next revision of the patchset cleaning up buffer head metadata\ntracking and use of address_space's private_list and private_lock. Functionally\nthis should be identical to v2, most of the changes were in improving\nchangelogs, patch ordering, function names, etc. The patches have survived some\ntesting with fstests and ltp however I didn't test AFFS and KVM guest_memfd\nchanges so a help with testing those would be very welcome. Thanks.\n\nChanges since v2:\n* Added Reviewed-by tags from Christoph\n* Dropped the patch unifying fsync implementation in fs/libfs.c and fs/buffer.c\n* Put fsync locking change into a separate commit\n* Reordered series to place all fsync path modifications close together\n* Improved some changelogs\n* Renamed some functions based on Christoph's feedback\n\nChanges since v1:\n* Fixed hugetlbfs handling of root directory\n* Reworked mapping_metadata_bhs handling functions to get the tracking\n structure as an argument so we now don't need iops method to fetch the struct\n from the inode\n* Reordered patches into more sensible order\n* Added patch to merge two mostly duplicate generic fsync implementations\n* Added Reviewed-by tags\n* Couple more minor changes that were requested during review\n\nOriginal cover letter:\n\nthis patch series cleans up the mess that has accumulated over the years in\nmetadata buffer_head tracking for inodes, moves the tracking into dedicated\nstructure in filesystem-private part of the inode (so that we don't use\nprivate_list, private_data, and private_lock in struct address_space), and also\nmoves couple other users of private_data and private_list so these are removed\nfrom struct address_space saving 3 longs in struct inode for 99% of inodes. I\nwould like to get rid of private_lock in struct address_space as well however\nthe locking changes for buffer_heads are non-trivial there and the patch series\nis long enough as is. So let's leave that for another time.\n\n block/bdev.c | 1 \n fs/affs/affs.h | 2 \n fs/affs/dir.c | 1 \n fs/affs/file.c | 1 \n fs/affs/inode.c | 2 \n fs/affs/super.c | 6 \n fs/affs/symlink.c | 1 \n fs/aio.c | 78 +++++++-\n fs/bfs/bfs.h | 2 \n fs/bfs/dir.c | 1 \n fs/bfs/file.c | 4 \n fs/bfs/inode.c | 9 +\n fs/buffer.c | 387 +++++++++++++++++---------------------------\n fs/ext2/ext2.h | 2 \n fs/ext2/file.c | 1 \n fs/ext2/inode.c | 3 \n fs/ext2/namei.c | 2 \n fs/ext2/super.c | 6 \n fs/ext2/symlink.c | 2 \n fs/ext4/ext4.h | 4 \n fs/ext4/file.c | 1 \n fs/ext4/inode.c | 9 -\n fs/ext4/namei.c | 2 \n fs/ext4/super.c | 9 -\n fs/ext4/symlink.c | 3 \n fs/fat/fat.h | 2 \n fs/fat/file.c | 1 \n fs/fat/inode.c | 16 +\n fs/fat/namei_msdos.c | 1 \n fs/fat/namei_vfat.c | 1 \n fs/gfs2/glock.c | 1 \n fs/hugetlbfs/inode.c | 10 -\n fs/inode.c | 24 +-\n fs/minix/file.c | 1 \n fs/minix/inode.c | 10 +\n fs/minix/minix.h | 2 \n fs/minix/namei.c | 1 \n fs/ntfs3/file.c | 3 \n fs/ocfs2/dlmglue.c | 1 \n fs/ocfs2/namei.c | 3 \n fs/udf/file.c | 1 \n fs/udf/inode.c | 2 \n fs/udf/namei.c | 1 \n fs/udf/super.c | 6 \n fs/udf/symlink.c | 1 \n fs/udf/udf_i.h | 1 \n fs/udf/udfdecl.h | 1 \n include/linux/buffer_head.h | 6 \n include/linux/fs.h | 11 -\n include/linux/hugetlb.h | 1 \n mm/hugetlb.c | 10 -\n virt/kvm/guest_memfd.c | 12 -\n 52 files changed, 360 insertions(+), 309 deletions(-)\n\n\t\t\t\t\t\t\t\tHonza\n\nPrevious versions:\nLink: http://lore.kernel.org/r/20260303101717.27224-1-jack@suse.cz # v1\nLink: http://lore.kernel.org/r/20260320131728.6449-1-jack@suse.cz # v2" }