{"id":2229002,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2229002/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260427154639.180684-21-dhowells@redhat.com/","project":{"id":12,"url":"http://patchwork.ozlabs.org/api/1.1/projects/12/?format=json","name":"Linux CIFS Client","link_name":"linux-cifs-client","list_id":"linux-cifs.vger.kernel.org","list_email":"linux-cifs@vger.kernel.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20260427154639.180684-21-dhowells@redhat.com>","date":"2026-04-27T15:46:35","name":"[v4,20/22] netfs: Fix netfs_read_folio() to wait on writeback","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"e9afe122dccf225caab21ae0a1e056b8b8fa770b","submitter":{"id":59,"url":"http://patchwork.ozlabs.org/api/1.1/people/59/?format=json","name":"David Howells","email":"dhowells@redhat.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260427154639.180684-21-dhowells@redhat.com/mbox/","series":[{"id":501682,"url":"http://patchwork.ozlabs.org/api/1.1/series/501682/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-cifs-client/list/?series=501682","date":"2026-04-27T15:46:15","name":"netfs: Miscellaneous fixes","version":4,"mbox":"http://patchwork.ozlabs.org/series/501682/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2229002/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2229002/checks/","tags":{},"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-cifs@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=HNOEVu2s;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c09:e001:a7::12fc:5321; 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c=relaxed/relaxed; d=redhat.com;\n\ts=mimecast20190719; t=1777304904;\n\th=from:from:reply-to:subject:subject:date:date:message-id:message-id:\n\t to:to:cc:cc:mime-version:mime-version:\n\t content-transfer-encoding:content-transfer-encoding:\n\t in-reply-to:in-reply-to:references:references;\n\tbh=m8TreMojEQ0wPuyO6zSmrQCQs0j8kwVy3C2ZGai7LkE=;\n\tb=HNOEVu2sfnBfzLiaKh9qvY+Sx2hxgpgqKXw4nMIMpKJwykf3gEuaxzrAmBIzwzozxl57vE\n\t+7iJWD2aH1ydQITG2ZZCVpYp6/6mb9/E36qs1LMZaaeMduOrWvJiAMbBa3rsccplmVsa68\n\tpi4v/IHUmAIdoi49IUfxzfF34cC9kfs=","X-MC-Unique":"ruZpO2nZNXevnvPOO4C5GA-1","X-Mimecast-MFC-AGG-ID":"ruZpO2nZNXevnvPOO4C5GA_1777304898","From":"David Howells ","To":"Christian Brauner ","Cc":"David Howells ,\n\tPaulo Alcantara ,\n\tnetfs@lists.linux.dev,\n\tlinux-afs@lists.infradead.org,\n\tlinux-cifs@vger.kernel.org,\n\tceph-devel@vger.kernel.org,\n\tlinux-fsdevel@vger.kernel.org,\n\tlinux-kernel@vger.kernel.org,\n\tMatthew Wilcox ","Subject":"[PATCH v4 20/22] netfs: Fix netfs_read_folio() to wait on writeback","Date":"Mon, 27 Apr 2026 16:46:35 +0100","Message-ID":"<20260427154639.180684-21-dhowells@redhat.com>","In-Reply-To":"<20260427154639.180684-1-dhowells@redhat.com>","References":"<20260427154639.180684-1-dhowells@redhat.com>","Precedence":"bulk","X-Mailing-List":"linux-cifs@vger.kernel.org","List-Id":"","List-Subscribe":"","List-Unsubscribe":"","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","X-Scanned-By":"MIMEDefang 3.0 on 10.30.177.12"},"content":"Fix netfs_read_folio() to wait for an ongoing writeback to complete so that\nit can trust the dirty flag and whatever is attached to folio->private\n(folio->private may get cleaned up by the collector before it clears the\nwriteback flag).\n\nFixes: ee4cdf7ba857 (\"netfs: Speed up buffered reading\")\nCloses: https://sashiko.dev/#/patchset/20260414082004.3756080-1-dhowells%40redhat.com\nSigned-off-by: David Howells \ncc: Paulo Alcantara \ncc: Matthew Wilcox \ncc: netfs@lists.linux.dev\ncc: linux-fsdevel@vger.kernel.org\n---\n fs/netfs/buffered_read.c | 2 ++\n 1 file changed, 2 insertions(+)","diff":"diff --git a/fs/netfs/buffered_read.c b/fs/netfs/buffered_read.c\nindex ec576d840594..5e299237c9ec 100644\n--- a/fs/netfs/buffered_read.c\n+++ b/fs/netfs/buffered_read.c\n@@ -508,6 +508,8 @@ int netfs_read_folio(struct file *file, struct folio *folio)\n \tstruct netfs_inode *ctx = netfs_inode(mapping->host);\n \tint ret;\n \n+\tfolio_wait_writeback(folio);\n+\n \tif (folio_test_dirty(folio))\n \t\treturn netfs_read_gaps(file, folio);\n \n","prefixes":["v4","20/22"]}