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GET /api/patches/2216321/?format=api
{ "id": 2216321, "url": "http://patchwork.ozlabs.org/api/patches/2216321/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/patch/20260326095354.16340-65-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": "<20260326095354.16340-65-jack@suse.cz>", "list_archive_url": null, "date": "2026-03-26T09:54:17", "name": "[23/42] fs: Stop using i_private_data for metadata bh tracking", "commit_ref": null, "pull_url": null, "state": "not-applicable", "archived": false, "hash": "4da4510046f0f201c0a028266559e2c989c75b09", "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/20260326095354.16340-65-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/2216321/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2216321/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <SRS0=ZAYQ=B2=vger.kernel.org=linux-ext4+bounces-15416-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=b08ZOEfJ;\n\tdkim=pass header.d=suse.cz header.i=@suse.cz header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=pShrlopN;\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=b08ZOEfJ;\n\tdkim=neutral header.d=suse.cz header.i=@suse.cz header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=pShrlopN;\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=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=iqluYAMrm+dlJHnbDot2ZiSjiPqYlwY3anHC6KE3E/0=;\n\tb=pShrlopN7+EXYPlUD6CGFrvOK+DfsalAJqLpwNhE9jvBQprSz5I8bxfdPeZwtXEzz6000j\n\tZ9EJrP0bzadH50Ag==", "v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz;\n s=susede2_rsa;\n\tt=1774518901;\n h=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=iqluYAMrm+dlJHnbDot2ZiSjiPqYlwY3anHC6KE3E/0=;\n\tb=b08ZOEfJtM2Ynt1u5G1/GAbwjMwgKPUxST1wMsTKKpdcjD2NhN5EBV29T+ReboLfn+MmGL\n\tZMxyS5iQg+/k52/6RQL05KRL1liFfFYFYexTTvl1PUutVDhlPNdG79umPVg9JQSNDNI80/\n\tG4y7nRrXpMt8XlrXkh56jkt96/FoOmU=", "v=1; a=ed25519-sha256; c=relaxed/relaxed; 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=iqluYAMrm+dlJHnbDot2ZiSjiPqYlwY3anHC6KE3E/0=;\n\tb=pShrlopN7+EXYPlUD6CGFrvOK+DfsalAJqLpwNhE9jvBQprSz5I8bxfdPeZwtXEzz6000j\n\tZ9EJrP0bzadH50Ag==" ], "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>,\n\tChristoph Hellwig <hch@lst.de>", "Subject": "[PATCH 23/42] fs: Stop using i_private_data for metadata bh tracking", "Date": "Thu, 26 Mar 2026 10:54:17 +0100", "Message-ID": "<20260326095354.16340-65-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=1907; i=jack@suse.cz;\n h=from:subject; bh=g9XgltzhqZEAFeB2kTfq2H5zg7Kg1FLbfHn4nC/1sQ0=;\n b=owEBbQGS/pANAwAIAZydqgc/ZEDZAcsmYgBpxQJFlCxxMASB9vH5ojG/AQXJTk5+dWsWbkKGk\n Hlm4JCwJcGJATMEAAEIAB0WIQSrWdEr1p4yirVVKBycnaoHP2RA2QUCacUCRQAKCRCcnaoHP2RA\n 2WDdCADNYweIxmM0eVGSwoohilwPuv2PxZEG08lAogRGbzNRzWGerA4Mb3r3SIaVaN6KXstCic+\n RDMoS444Vyc09q/RiYPAqF3c9bOmL+ZCB63WVEcjlbi8T3+va2aOS5qTLGuySE5eJPrXtidm9z9\n CIovP2aCrQp583wrhwlhLnOvLiUFJtljPh2LPhFqc3z4I2kPIrksXMze7nXnSdxToqoBZmSNtGq\n LVHpniSiQlAKoe8r2sFl+lwKHkSLndQKMkmMk4XST1yIU/ZdFPbuszGqy6gHnJbPo8WV/H/zISo\n PMoXZpIihwTQfvnOnwoAamOEUXbGz4ZzoydP3mzKoPSXVbLZ", "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)[17];\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,lst.de];\n\tR_RATELIMIT(0.00)[to(RLpnp1psq57oqao6ocwdpbxen9),to_ip_from(RLck8brw5hxmszoarioc7838it)];\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": "All filesystem using generic metadata bh tracking are using bdev mapping\nas a backing for these bhs. Stop using i_private_data for it and get to\nbdev mapping directly.\n\nReviewed-by: Christoph Hellwig <hch@lst.de>\nSigned-off-by: Jan Kara <jack@suse.cz>\n---\n fs/buffer.c | 13 +++++--------\n 1 file changed, 5 insertions(+), 8 deletions(-)", "diff": "diff --git a/fs/buffer.c b/fs/buffer.c\nindex bd48644e1bf8..c85ccfb1a4ec 100644\n--- a/fs/buffer.c\n+++ b/fs/buffer.c\n@@ -574,9 +574,10 @@ static int osync_buffers_list(spinlock_t *lock, struct list_head *list)\n */\n int sync_mapping_buffers(struct address_space *mapping)\n {\n-\tstruct address_space *buffer_mapping = mapping->i_private_data;\n+\tstruct address_space *buffer_mapping =\n+\t\t\t\tmapping->host->i_sb->s_bdev->bd_mapping;\n \n-\tif (buffer_mapping == NULL || list_empty(&mapping->i_private_list))\n+\tif (list_empty(&mapping->i_private_list))\n \t\treturn 0;\n \n \treturn fsync_buffers_list(&buffer_mapping->i_private_lock,\n@@ -679,11 +680,6 @@ void mark_buffer_dirty_inode(struct buffer_head *bh, struct inode *inode)\n \tstruct address_space *buffer_mapping = bh->b_folio->mapping;\n \n \tmark_buffer_dirty(bh);\n-\tif (!mapping->i_private_data) {\n-\t\tmapping->i_private_data = buffer_mapping;\n-\t} else {\n-\t\tBUG_ON(mapping->i_private_data != buffer_mapping);\n-\t}\n \tif (!bh->b_assoc_map) {\n \t\tspin_lock(&buffer_mapping->i_private_lock);\n \t\tlist_move_tail(&bh->b_assoc_buffers,\n@@ -868,7 +864,8 @@ void invalidate_inode_buffers(struct inode *inode)\n \tif (inode_has_buffers(inode)) {\n \t\tstruct address_space *mapping = &inode->i_data;\n \t\tstruct list_head *list = &mapping->i_private_list;\n-\t\tstruct address_space *buffer_mapping = mapping->i_private_data;\n+\t\tstruct address_space *buffer_mapping =\n+\t\t\t\tmapping->host->i_sb->s_bdev->bd_mapping;\n \n \t\tspin_lock(&buffer_mapping->i_private_lock);\n \t\twhile (!list_empty(list))\n", "prefixes": [ "23/42" ] }