From patchwork Wed Oct 2 18:49:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 13820289 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 0EE8C221684; Wed, 2 Oct 2024 18:50:25 +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=1727895027; cv=none; b=uiPw/6MmB2iykWj/0hdv3F7164dIFogyO62ipVW6BLCzehWgaIJz8Z7Jy260UAKFizLwRzxFZhhmlOyfaSdQDxwRJ3Hfz//j4IppN4aL8YWrrMZmwvALFejudvwfBOAJUjcWIHrwmUVjHTn8uBRVc8HrcX5JMxyQrEHxZOAMZdI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727895027; c=relaxed/simple; bh=XlC7YeycewlZi2a3r3W7IO7Qd7YSP47/MVJ/d8lrj20=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Jrq70AskMzB1JD6DO9XVEgImT3gbp4moyWOXDis+JgGjvjUPUfqZbVDItlZeTNcLy5pOU9BPMBPNFYcLxrXfytWzNUtjsDEbrj5veQAO7COGBDUmnz1btmN9+Y1jNrQckhl7Aa3Ex6KQE7yAXvOAzx0hVayy+Z6g69lL4rporZI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=O6KA5467; 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="O6KA5467" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1DCDFC4CED6; Wed, 2 Oct 2024 18:50:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1727895025; bh=XlC7YeycewlZi2a3r3W7IO7Qd7YSP47/MVJ/d8lrj20=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=O6KA5467Sbp5TN0nr9okSkPDnFzH6zjeE7j6psU2LHS76B0vrpzt9XXInhnHpKxj6 IJs1st80UCkJwLsitlK7096E6X9jQZ7DAweZwN5sVJy+FC2ISbg1SbXK3VGPenYxEk U1IAgYoMVkepjPYtM/hR3yd7lJxl9NKfOImCUoaQR4qRm/5o/Tv+wRjtMzSXJXvoRk icvbBr7WDPMt13T6kpBcJ1IQsUsshFCn4l47xcRCfIkm/Pt+BUR0EEtuogKsRctilw Z7ryrSB373dkJA5xHGzMG+5E8MF7Q282D9nx7DfVsDLyUd396fvwKC8xgFkLfmt5Pi CNEBkjUV9IVeQ== From: Jeff Layton Date: Wed, 02 Oct 2024 14:49:40 -0400 Subject: [PATCH v9 12/12] tmpfs: add support for multigrain timestamps Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241002-mgtime-v9-12-77e2baad57ac@kernel.org> References: <20241002-mgtime-v9-0-77e2baad57ac@kernel.org> In-Reply-To: <20241002-mgtime-v9-0-77e2baad57ac@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=XlC7YeycewlZi2a3r3W7IO7Qd7YSP47/MVJ/d8lrj20=; b=owEBbQKS/ZANAwAIAQAOaEEZVoIVAcsmYgBm/ZXN6h1nh3Jd6jDRqtordF48NCXbHTMIIvKYt k0JvUmUUnGJAjMEAAEIAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCZv2VzQAKCRAADmhBGVaC Feo8D/41p25TrFB0UfY7raME3RSw3V2+1l+VzsBd4T4VUALomAlvpx4rASZanyQ4quJ03pKkB6s rQ9nT3rVtZ+El2EmDy69MXcp8S4KT6MYsiE3NYuVD68oO/NzqNxYUJqM+iSlB7dOB9VONqcos/D uuLiZrD4b/K1jV8heLBwjcXK5mn0koIux75p1x/JCycT5gLRXS2ADRz0cntSbdRPheNG+QcWJtP kt1yBPc6JbSDnXd7F7W+ouC3SylDJfAntabc8Xi0Wns5/8XFWcLjMw0xCsW3dGwbIl8o0O8GEd1 eSpRT0khfdmm2ovPwC9gPXrrQPRdD+ZeEB1o8iUUhQ4LZmc8DWRL5sQ8gDH30E0P748Z/x/QvL1 dTNj80QaMOjeDyzEczN/3basPLVSn6FmAJMSHy04/Q48JvoMbBlLDfaNqlMSg8BT5WneKtii63O VYAAGC+sHZBu/sCKkSE49A4yZZ11DWlK5lD8zYO6BxmQMkhQ/X8weMwUFlZz5jwnFO6dZOtoFg1 RwtHKlDJSUn37SiERYT+bS9JfPGzMDXPW4grx9yYoHTgw9K3MvbsLBlXqCNU5SkAH+HY8mkKr40 MQom1aU4ONpgq+6oOFh1kuv+sb4AUhpUCpPaSDInyl1cNw2X4crJh9AJQR6ujOvMOCbLK9NjmRi F8V1mxt8ohQeGyw== 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 5a77acf6ac6a..5f17eaaa32e2 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -4804,7 +4804,7 @@ static struct file_system_type shmem_fs_type = { .parameters = shmem_fs_parameters, #endif .kill_sb = kill_litter_super, - .fs_flags = FS_USERNS_MOUNT | FS_ALLOW_IDMAP, + .fs_flags = FS_USERNS_MOUNT | FS_ALLOW_IDMAP | FS_MGTIME, }; void __init shmem_init(void)