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GET /api/patches/2216335/?format=api
{ "id": 2216335, "url": "http://patchwork.ozlabs.org/api/patches/2216335/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/patch/20260326095354.16340-82-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": "<20260326095354.16340-82-jack@suse.cz>", "list_archive_url": null, "date": "2026-03-26T09:54:34", "name": "[40/42] ext4: Track metadata bhs in fs-private inode part", "commit_ref": null, "pull_url": null, "state": "not-applicable", "archived": false, "hash": "c8828adac9ade688f7ccb107671aecadf6b2c178", "submitter": { "id": 363, "url": "http://patchwork.ozlabs.org/api/people/363/?format=api", "name": "Jan Kara", "email": "jack@suse.cz" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-ext4/patch/20260326095354.16340-82-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/patches/2216335/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2216335/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <SRS0=LcTE=B2=vger.kernel.org=linux-ext4+bounces-15430-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=yjkZaXGO;\n\tdkim=pass header.d=suse.cz header.i=@suse.cz header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=XKCdYjPu;\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=yjkZaXGO;\n\tdkim=neutral header.d=suse.cz header.i=@suse.cz header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=XKCdYjPu;\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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d=suse.cz;\n\ts=susede2_ed25519; t=1774518901;\n\th=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc:\n\t mime-version:mime-version:\n\t content-transfer-encoding:content-transfer-encoding:\n\t in-reply-to:in-reply-to:references:references;\n\tbh=Cm90rdUlWxy4QnRmbQ6DrHQpjRNXGV5jhYymyeB6abI=;\n\tb=XKCdYjPu1A+14grGsWLA549acStjCWsj38dAoJd3igr7p1zts8guCf6yPs21oSj4UnmPNV\n\t2GY07oSk2Yx0nvBA==" ], "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 40/42] ext4: Track metadata bhs in fs-private inode part", "Date": "Thu, 26 Mar 2026 10:54:34 +0100", "Message-ID": "<20260326095354.16340-82-jack@suse.cz>", "X-Mailer": "git-send-email 2.51.0", "In-Reply-To": "<20260326082428.31660-1-jack@suse.cz>", "References": "<20260326082428.31660-1-jack@suse.cz>", "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=3926; i=jack@suse.cz;\n h=from:subject; bh=9xBH/IqErKiIiNqWXJjy809lW/6/4LgxYE6Bk76CpFo=;\n b=owEBbQGS/pANAwAIAZydqgc/ZEDZAcsmYgBpxQJUDID/ZAUL5XAy2UizNNky/Yki15nrbCzj2\n 38rMkVQuT6JATMEAAEIAB0WIQSrWdEr1p4yirVVKBycnaoHP2RA2QUCacUCVAAKCRCcnaoHP2RA\n 2Q2WB/9Y928g9eFz58LRsc7RHaB+gGxibmuIx9F4zAB0qmKEX9gGTCMxnwDKNE/J7SLaANuTjQ+\n wvjW0OF0ds2gDehs56OIrYWGMpaBdqvzevym1o7KzaxxETjrgxj30OVGsWktpoyVFa0LBkvi84q\n n0cJ7AOIx0+nhwv9zXYIdX4mzhNjaym5qZXiK6zx4+mHr0O5Zimy0L4O2BdnnXCRcVZZAMhDHc8\n xnlbnSIgtS7bC1QYftSWEnHPj/futMxcn/hV0gk4ovjAi/4bUHeTn+xXzbAJk2k9GA4jJ+skwcN\n MZdLjqeBm6eOr8AIIdhljKhyPfNmFfyqCVnQxyj0YDx77YIF", "X-Developer-Key": "i=jack@suse.cz; a=openpgp;\n fpr=93C6099A142276A28BBE35D815BC833443038D8C", "Content-Transfer-Encoding": "8bit", "X-Spamd-Result": "default: False [-1.30 / 50.00];\n\tBAYES_HAM(-3.00)[100.00%];\n\tSUSPICIOUS_RECIPS(1.50)[];\n\tNEURAL_HAM_LONG(-1.00)[-1.000];\n\tMID_CONTAINS_FROM(1.00)[];\n\tR_MISSING_CHARSET(0.50)[];\n\tNEURAL_HAM_SHORT(-0.20)[-1.000];\n\tMIME_GOOD(-0.10)[text/plain];\n\tTAGGED_RCPT(0.00)[];\n\tMIME_TRACE(0.00)[0:+];\n\tFUZZY_RATELIMITED(0.00)[rspamd.com];\n\tRCVD_VIA_SMTP_AUTH(0.00)[];\n\tTO_DN_SOME(0.00)[];\n\tRCPT_COUNT_TWELVE(0.00)[16];\n\tARC_NA(0.00)[];\n\tRCVD_COUNT_THREE(0.00)[3];\n\tDKIM_SIGNED(0.00)[suse.cz:s=susede2_rsa,suse.cz:s=susede2_ed25519];\n\tFROM_HAS_DN(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\tR_RATELIMIT(0.00)[to_ip_from(RLck8brw5hxmszoarioc7838it),to(RLpnp1psq57oqao6ocwdpbxen9)];\n\tFROM_EQ_ENVFROM(0.00)[];\n\tTO_MATCH_ENVRCPT_ALL(0.00)[];\n\tDBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo];\n\tRCVD_TLS_LAST(0.00)[];\n\tFREEMAIL_ENVRCPT(0.00)[gmail.com]", "X-Spam-Score": "-1.30", "X-Spam-Level": "", "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": "Track metadata bhs for an inode in fs-private part of the inode. We need\nthe tracking only for nojournal mode so this is somewhat wasteful. We\ncan relatively easily make the mapping_metadata_bhs struct dynamically\nallocated similarly to how we treat jbd2_inode but let's leave that for\next4 specific series once the dust settles a bit.\n\nSigned-off-by: Jan Kara <jack@suse.cz>\n---\n fs/ext4/ext4.h | 1 +\n fs/ext4/ext4_jbd2.c | 3 ++-\n fs/ext4/fsync.c | 5 +++--\n fs/ext4/inode.c | 4 ++--\n fs/ext4/super.c | 3 ++-\n 5 files changed, 10 insertions(+), 6 deletions(-)", "diff": "diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h\nindex 293f698b7042..8df3617fd0e7 100644\n--- a/fs/ext4/ext4.h\n+++ b/fs/ext4/ext4.h\n@@ -1121,6 +1121,7 @@ struct ext4_inode_info {\n \tstruct rw_semaphore i_data_sem;\n \tstruct inode vfs_inode;\n \tstruct jbd2_inode *jinode;\n+\tstruct mapping_metadata_bhs i_metadata_bhs;\n \n \t/*\n \t * File creation time. Its function is same as that of\ndiff --git a/fs/ext4/ext4_jbd2.c b/fs/ext4/ext4_jbd2.c\nindex 05e5946ed9b3..9a8c225f2753 100644\n--- a/fs/ext4/ext4_jbd2.c\n+++ b/fs/ext4/ext4_jbd2.c\n@@ -390,7 +390,8 @@ int __ext4_handle_dirty_metadata(const char *where, unsigned int line,\n \t\t}\n \t} else {\n \t\tif (inode)\n-\t\t\tmark_buffer_dirty_inode(bh, inode);\n+\t\t\tmmb_mark_buffer_dirty(bh,\n+\t\t\t\t\t &EXT4_I(inode)->i_metadata_bhs);\n \t\telse\n \t\t\tmark_buffer_dirty(bh);\n \t\tif (inode && inode_needs_sync(inode)) {\ndiff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c\nindex e476c6de3074..aa80af2b4eea 100644\n--- a/fs/ext4/fsync.c\n+++ b/fs/ext4/fsync.c\n@@ -68,7 +68,7 @@ static int ext4_sync_parent(struct inode *inode)\n \t\t * through ext4_evict_inode()) and so we are safe to flush\n \t\t * metadata blocks and the inode.\n \t\t */\n-\t\tret = sync_mapping_buffers(inode->i_mapping);\n+\t\tret = mmb_sync(&EXT4_I(inode)->i_metadata_bhs);\n \t\tif (ret)\n \t\t\tbreak;\n \t\tret = sync_inode_metadata(inode, 1);\n@@ -85,7 +85,8 @@ static int ext4_fsync_nojournal(struct file *file, loff_t start, loff_t end,\n \tstruct inode *inode = file->f_inode;\n \tint ret;\n \n-\tret = generic_buffers_fsync_noflush(file, start, end, datasync);\n+\tret = mmb_fsync_noflush(file, &EXT4_I(inode)->i_metadata_bhs,\n+\t\t\t\tstart, end, datasync);\n \tif (!ret)\n \t\tret = ext4_sync_parent(inode);\n \tif (test_opt(inode->i_sb, BARRIER))\ndiff --git a/fs/ext4/inode.c b/fs/ext4/inode.c\nindex 011cb2eb16a2..c9fd1d17b492 100644\n--- a/fs/ext4/inode.c\n+++ b/fs/ext4/inode.c\n@@ -187,7 +187,7 @@ void ext4_evict_inode(struct inode *inode)\n \t\ttruncate_inode_pages_final(&inode->i_data);\n \t\t/* Avoid mballoc special inode which has no proper iops */\n \t\tif (!EXT4_SB(inode->i_sb)->s_journal)\n-\t\t\tsync_mapping_buffers(&inode->i_data);\n+\t\t\tmmb_sync(&EXT4_I(inode)->i_metadata_bhs);\n \t\tgoto no_delete;\n \t}\n \n@@ -3436,7 +3436,7 @@ static bool ext4_inode_datasync_dirty(struct inode *inode)\n \t}\n \n \t/* Any metadata buffers to write? */\n-\tif (mmb_has_buffers(&inode->i_mapping->i_metadata_bhs))\n+\tif (mmb_has_buffers(&EXT4_I(inode)->i_metadata_bhs))\n \t\treturn true;\n \treturn inode_state_read_once(inode) & I_DIRTY_DATASYNC;\n }\ndiff --git a/fs/ext4/super.c b/fs/ext4/super.c\nindex ea827b0ecc8d..31f787a65fac 100644\n--- a/fs/ext4/super.c\n+++ b/fs/ext4/super.c\n@@ -1428,6 +1428,7 @@ static struct inode *ext4_alloc_inode(struct super_block *sb)\n \tINIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work);\n \text4_fc_init_inode(&ei->vfs_inode);\n \tspin_lock_init(&ei->i_fc_lock);\n+\tmmb_init(&ei->i_metadata_bhs, &ei->vfs_inode.i_data);\n \treturn &ei->vfs_inode;\n }\n \n@@ -1525,7 +1526,7 @@ void ext4_clear_inode(struct inode *inode)\n {\n \text4_fc_del(inode);\n \tif (!EXT4_SB(inode->i_sb)->s_journal)\n-\t\tinvalidate_inode_buffers(inode);\n+\t\tmmb_invalidate(&EXT4_I(inode)->i_metadata_bhs);\n \tclear_inode(inode);\n \text4_discard_preallocations(inode);\n \text4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS);\n", "prefixes": [ "40/42" ] }