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GET /api/patches/2216326/?format=api
{ "id": 2216326, "url": "http://patchwork.ozlabs.org/api/patches/2216326/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/patch/20260326095354.16340-70-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": "<20260326095354.16340-70-jack@suse.cz>", "list_archive_url": null, "date": "2026-03-26T09:54:22", "name": "[28/42] fs: Drop osync_buffers_list()", "commit_ref": null, "pull_url": null, "state": "not-applicable", "archived": false, "hash": "05d514dd6ac805c681e006ccdc5bae909694cc5f", "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/20260326095354.16340-70-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/2216326/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2216326/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <SRS0=fCXR=B2=vger.kernel.org=linux-ext4+bounces-15423-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=hqLBQU7d;\n\tdkim=pass header.d=suse.cz header.i=@suse.cz header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=pCcdbmui;\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=hqLBQU7d;\n\tdkim=neutral header.d=suse.cz header.i=@suse.cz header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=pCcdbmui;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=ozlabs.org\n (client-ip=150.107.74.76; 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dkim-atps=neutral;\n spf=pass (client-ip=2600:3c0a:e001:db::12fc:5321; helo=sea.lore.kernel.org;\n envelope-from=linux-ext4+bounces-15423-patchwork-incoming=ozlabs.org@vger.kernel.org;\n receiver=ozlabs.org) smtp.mailfrom=vger.kernel.org", "i=1; smtp.subspace.kernel.org;\n dmarc=none (p=none dis=none) header.from=suse.cz;\n spf=pass smtp.mailfrom=suse.cz;\n dkim=pass (1024-bit key) header.d=suse.cz header.i=@suse.cz\n header.b=hqLBQU7d;\n dkim=permerror (0-bit key) header.d=suse.cz header.i=@suse.cz\n header.b=pCcdbmui;\n dkim=pass (1024-bit key) header.d=suse.cz header.i=@suse.cz\n header.b=hqLBQU7d;\n dkim=permerror (0-bit key) header.d=suse.cz header.i=@suse.cz\n header.b=pCcdbmui; arc=none smtp.client-ip=195.135.223.130" ], "DKIM-Signature": [ "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=2VN0idt6n96Vmu45gqkPTClQxBC+i1ol12Ngkp3rwow=;\n\tb=hqLBQU7d8s9AMtdxZk95gyXZ2VDZw8FFwi7t1ABbZA56aQlBA5NTJ3alF4xc/2hK/fjrsb\n\tsWfwI0toNC+sfvOVyAKM0vp9VUGZQsZOizNBMv9iVDYwr6G3Dq6sGmXd076eSnFjM+RSdA\n\tbZM1h8J3zOFDUmdzhwnURijYCKJrEpU=", "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=2VN0idt6n96Vmu45gqkPTClQxBC+i1ol12Ngkp3rwow=;\n\tb=pCcdbmuiCX2PtzgDNrgpyVaS4QttSR28ki4jT9WQcUSLcTubT179MO0q60LwYfwyG2tbZl\n\tyufkTnTxn+x8tUAg==", "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=2VN0idt6n96Vmu45gqkPTClQxBC+i1ol12Ngkp3rwow=;\n\tb=hqLBQU7d8s9AMtdxZk95gyXZ2VDZw8FFwi7t1ABbZA56aQlBA5NTJ3alF4xc/2hK/fjrsb\n\tsWfwI0toNC+sfvOVyAKM0vp9VUGZQsZOizNBMv9iVDYwr6G3Dq6sGmXd076eSnFjM+RSdA\n\tbZM1h8J3zOFDUmdzhwnURijYCKJrEpU=", "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=2VN0idt6n96Vmu45gqkPTClQxBC+i1ol12Ngkp3rwow=;\n\tb=pCcdbmuiCX2PtzgDNrgpyVaS4QttSR28ki4jT9WQcUSLcTubT179MO0q60LwYfwyG2tbZl\n\tyufkTnTxn+x8tUAg==" ], "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 28/42] fs: Drop osync_buffers_list()", "Date": "Thu, 26 Mar 2026 10:54:22 +0100", "Message-ID": "<20260326095354.16340-70-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=2509; i=jack@suse.cz;\n h=from:subject; bh=P2d2o5A/mRUbDC1tll4F9435kE5r2df19H6YCaU+O8A=;\n b=owEBbQGS/pANAwAIAZydqgc/ZEDZAcsmYgBpxQJKDavHJWR7z6TonZsIlZ9x63I6Wk1aS5X5k\n ap0qKlkOeeJATMEAAEIAB0WIQSrWdEr1p4yirVVKBycnaoHP2RA2QUCacUCSgAKCRCcnaoHP2RA\n 2XI4B/9m5jDFDP7odiCDdIr7EejykCusvbqzcv5UUD6AoRXzqfbDMYOjbu4DnxiHT+iceGY1VFt\n ZLMpAF3whLABWHGOLipy7CSdo74LwlgQKozYD3+qUHiO4YbZHQ17k3GNKVBI5AYZbGwTGiqbBaQ\n X1ZKIEJsxXZzD5dIQK9Mk9g1rcl4FL/6WQYVZqcFr0zzSr4LESzllVSc0hFuxAoGuSN9nnyFWnd\n ZgMWTXLw+89hlQJFn2NfpDH20qjak6XbbOXT8FD7wP/7K5qIaAzIqIiyltkfZT8/GoaGiFzKHtW\n En8xcJPG67Lgv1zcRjym0gq5M8bWCz40/xz73/jR+ezsFtyI", "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\tRBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from];\n\tFUZZY_RATELIMITED(0.00)[rspamd.com];\n\tMIME_TRACE(0.00)[0:+];\n\tARC_NA(0.00)[];\n\tRCPT_COUNT_TWELVE(0.00)[17];\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\tR_RATELIMIT(0.00)[to_ip_from(RLhafujjw6m7bafrsz8p45s31g),to(RLpnp1psq57oqao6ocwdpbxen9)];\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\tDKIM_TRACE(0.00)[suse.cz:+];\n\tFROM_EQ_ENVFROM(0.00)[];\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": "7C61B4D293", "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": "The function only waits for already locked buffers in the list of\nmetadata bhs. fsync_buffers_list() has just waited for all outstanding\nIO on buffers so this isn't adding anything useful. Comment in front of\nfsync_buffers_list() mentions concerns about buffers being moved out\nfrom tmp list back to mappings i_private_list but these days\nmark_buffer_dirty_inode() doesn't touch inodes with b_assoc_map set so\nthat cannot happen. Just delete the stale code.\n\nReviewed-by: Christoph Hellwig <hch@lst.de>\nSigned-off-by: Jan Kara <jack@suse.cz>\n---\n fs/buffer.c | 43 ++-----------------------------------------\n 1 file changed, 2 insertions(+), 41 deletions(-)", "diff": "diff --git a/fs/buffer.c b/fs/buffer.c\nindex c85ccfb1a4ec..1c0e7c81a38b 100644\n--- a/fs/buffer.c\n+++ b/fs/buffer.c\n@@ -526,41 +526,6 @@ int inode_has_buffers(struct inode *inode)\n }\n EXPORT_SYMBOL_GPL(inode_has_buffers);\n \n-/*\n- * osync is designed to support O_SYNC io. It waits synchronously for\n- * all already-submitted IO to complete, but does not queue any new\n- * writes to the disk.\n- *\n- * To do O_SYNC writes, just queue the buffer writes with write_dirty_buffer\n- * as you dirty the buffers, and then use osync_inode_buffers to wait for\n- * completion. Any other dirty buffers which are not yet queued for\n- * write will not be flushed to disk by the osync.\n- */\n-static int osync_buffers_list(spinlock_t *lock, struct list_head *list)\n-{\n-\tstruct buffer_head *bh;\n-\tstruct list_head *p;\n-\tint err = 0;\n-\n-\tspin_lock(lock);\n-repeat:\n-\tlist_for_each_prev(p, list) {\n-\t\tbh = BH_ENTRY(p);\n-\t\tif (buffer_locked(bh)) {\n-\t\t\tget_bh(bh);\n-\t\t\tspin_unlock(lock);\n-\t\t\twait_on_buffer(bh);\n-\t\t\tif (!buffer_uptodate(bh))\n-\t\t\t\terr = -EIO;\n-\t\t\tbrelse(bh);\n-\t\t\tspin_lock(lock);\n-\t\t\tgoto repeat;\n-\t\t}\n-\t}\n-\tspin_unlock(lock);\n-\treturn err;\n-}\n-\n /**\n * sync_mapping_buffers - write out & wait upon a mapping's \"associated\" buffers\n * @mapping: the mapping which wants those buffers written\n@@ -777,7 +742,7 @@ static int fsync_buffers_list(spinlock_t *lock, struct list_head *list)\n {\n \tstruct buffer_head *bh;\n \tstruct address_space *mapping;\n-\tint err = 0, err2;\n+\tint err = 0;\n \tstruct blk_plug plug;\n \tLIST_HEAD(tmp);\n \n@@ -844,11 +809,7 @@ static int fsync_buffers_list(spinlock_t *lock, struct list_head *list)\n \t}\n \t\n \tspin_unlock(lock);\n-\terr2 = osync_buffers_list(lock, list);\n-\tif (err)\n-\t\treturn err;\n-\telse\n-\t\treturn err2;\n+\treturn err;\n }\n \n /*\n", "prefixes": [ "28/42" ] }