From nobody Thu Nov 28 15:36:08 2024 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EB1261C6F67; Tue, 1 Oct 2024 10:59:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727780384; cv=none; b=m+P57GVxJiFloHxOHVYSQ1ZLjE/EM7aJqLSZpSYqztZDoidSCS95Zq002Rq0nEzbMz1Yb5g0wpcTNNV2JFaTS63p6eqqd/zpsMBEWKpcfKXyK65uAiHcU3yIOuYYJo0/3UaDDHQPKruAxrC44j/ydlyZme69201ooG3jqPZoRRU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727780384; c=relaxed/simple; bh=vfABgeY7uP8db917PbV1dpj3MLFQbmpQZkOBbve6x6s=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=DPH6kTSvf8NXNPmlagRC+plNrs0Msnr7RRSPv1ogFMuUDKfIcunSdMeqb+tCx//3J7N0oe4plvBfFnmqqXhWujG2lYTBYz7071JZ96PgOPbUZMK/elm/oxtIgXcifuJYW5BdDvpRYc5NyPmrBbBHIDOvePyMmLp3SGCidwo5e2A= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=NqhWoLr2; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="NqhWoLr2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 428E1C4CECD; Tue, 1 Oct 2024 10:59:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1727780383; bh=vfABgeY7uP8db917PbV1dpj3MLFQbmpQZkOBbve6x6s=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=NqhWoLr2qLRQdOkLcMCIBUNS616yE7Wsn2Do3FYKCPxTNAtUhlMY/8vPDqL9CORJ8 gawIrH/IWI+r3aob9UJ951bTu/BMDqZyz55vv0Dwt75DKG3XVFJh+t15nLMHHgmMbn 96Izn6X94VrbCOjG3imdMEt1RCnZa7cVICavqgsbX/cY5RAUpWFPvAf367i7Z/eUkH fV3g68UZZQ5YPZXcLa396R8kWtFuPbB7nD86sjo58JBtkRSEyAc54RJQT5xRH6ebl3 h/caq+ZGm7/fH6u2XMHwCQ3JTm55c66IdUVEDyJC+VNQhN/gDSUWfHmV3q+IsazEps HUQADV0X3MASA== From: Jeff Layton Date: Tue, 01 Oct 2024 06:59:06 -0400 Subject: [PATCH v8 12/12] tmpfs: add support for multigrain timestamps Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20241001-mgtime-v8-12-903343d91bc3@kernel.org> References: <20241001-mgtime-v8-0-903343d91bc3@kernel.org> In-Reply-To: <20241001-mgtime-v8-0-903343d91bc3@kernel.org> To: John Stultz , Thomas Gleixner , Stephen Boyd , Alexander Viro , Christian Brauner , Jan Kara , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Jonathan Corbet , Randy Dunlap , Chandan Babu R , "Darrick J. Wong" , Theodore Ts'o , Andreas Dilger , Chris Mason , Josef Bacik , David Sterba , Hugh Dickins , Andrew Morton , Chuck Lever , Vadim Fedorenko Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-xfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-nfs@vger.kernel.org, linux-mm@kvack.org, Jeff Layton X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=openpgp-sha256; l=932; i=jlayton@kernel.org; h=from:subject:message-id; bh=vfABgeY7uP8db917PbV1dpj3MLFQbmpQZkOBbve6x6s=; b=owEBbQKS/ZANAwAIAQAOaEEZVoIVAcsmYgBm+9X7QDV7gFcbV+IsKkmQpXurd3+vww+OClJdZ SSWm3r5Cg2JAjMEAAEIAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCZvvV+wAKCRAADmhBGVaC FV6PEACdz7xhqHbN+F1/z0hQRO4/mNdSl1k7n8dBoxQIuT87EzYxjm+op9ZONXBq7Wi9B7zpVO4 +yg18nLaWlVJ/wyVOFlsN9AyY3M3qJ0E1xVqYGkg+D0siO/CKOYvUIi6DTP6n5rxvjrgB96B6be 3qVtF/YPIEC6ZXkd5pBa1nyA5B8NYkHJNp1mM1DLxDSyui4SfSdOR42NDEYGBB7AYXZHL8I+fGu VN+hVOpC0sW/rp4dEYSNd0rYKNGEc43bN+N6wG8SurCZMFMQYaGXkcTCti3PhldmzKH1WfFX9TG MqF0eshQ5RDGJP7c94SJeYoZrHOoDAV0ad9MDFseXziUXUbJewSI/WdpUbQbcPDdCRw58Qy1gDG VkD2HVjbK9ty8Rpe5GtkhmudPY3sb7BLC9DRg2W++B4uXM5qJO4GPZwHSJ9buzL9grC/6q28BRo lGEJN8oAh0jMElH6cjMSnFA9Kw4waaK2pCj0337UyhmARAFHrE1yXon1oqS6j9XmT68wrXeLw4m bQhXGdsxvFGNn91k35C9P60R3dKONLg5/DcccX8F8HSwGDDH65KbRzt65ICP7217BznAXCP8VQY ywjpwBUVXttEZ9/AGCiJLXq/xZnoaRs6Ss+0JHgEbIbzV4eeXQ5bfTjomIrl9R4boIUCfbf0/k3 JXXFUvScYgNP0ng== X-Developer-Key: i=jlayton@kernel.org; a=openpgp; fpr=4BC0D7B24471B2A184EAF5D3000E684119568215 Enable multigrain timestamps, which should ensure that there is an apparent change to the timestamp whenever it has been written after being actively observed via getattr. tmpfs only requires the FS_MGTIME flag. Reviewed-by: Josef Bacik Reviewed-by: Jan Kara Tested-by: Randy Dunlap # documentation bits Signed-off-by: Jeff Layton --- mm/shmem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/shmem.c b/mm/shmem.c index 4f11b5506363..3444efc275b1 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -4951,7 +4951,7 @@ static struct file_system_type shmem_fs_type =3D { .parameters =3D shmem_fs_parameters, #endif .kill_sb =3D kill_litter_super, - .fs_flags =3D FS_USERNS_MOUNT | FS_ALLOW_IDMAP, + .fs_flags =3D FS_USERNS_MOUNT | FS_ALLOW_IDMAP | FS_MGTIME, }; =20 void __init shmem_init(void) --=20 2.46.2