From nobody Thu Apr 9 21:49:51 2026 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 7743736E47C; Thu, 5 Mar 2026 23:31:19 +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=1772753479; cv=none; b=AUq/70oTwS+qCg/JGcs84Jkf9IpHpVc2oqg+dRimP3Xh3lXNyOcgRrUg3GRw/lEcQwmnyX9J6wl+xJcYW1mUr7zy/V5lJkjAwioWLgxOpB78/xGjhm0NvHlV9Nkrd2VHNEAZCDfhdbKqrlXZ3mRhbrTzVzStDyljgXmSBiAQH6s= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772753479; c=relaxed/simple; bh=7s8+VRxkVOYhZ/0V/yWyXtD+NXc+CLa2t/HYS4SO890=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=XZKqul1RJavAmvmSLBntUT/b5P9Lh03HW6Jp3sSSNZQaWBJhHT6cz2psQn2xpiwlL7FDOWCGQOCdHd+FkMGEjSX0hq4qgTTw+NFgahf1P0TWI4/WySVAufiA4sH3d6fKhpytECJ0378kq/bxGJaZIhyqu4WISlJgcwXfnjZJyqY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=arNEtzTW; 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="arNEtzTW" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 605F6C116C6; Thu, 5 Mar 2026 23:31:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772753479; bh=7s8+VRxkVOYhZ/0V/yWyXtD+NXc+CLa2t/HYS4SO890=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=arNEtzTW8xel+h6UkihMZ3oOj5qkVkY1dkfcq/ZUMlJvN3j7m/hgFlQU9Ho9UI7OA OEJSgP0mQMY2+52yPprsEWPyrx8jklP0uknlg6+m9ibadIp9mFrJJT2zoEZd+Hutoa SaC7g1+S6gs/NMUaXym2W03FnFHHCXav6LmWdyGQy2Zk5UX24NHkzjWmHDOPQbK8XN OJXNLoOBXhmMVqV0IyZIY7SOdecN6NuOnzQTGi5oMNTWv/1QOMgSsGnuNm5EGQBcHg fH3YEODvGDy6t42wShlPlUtJAOw1B1Igl0mpu2SPSvWtxz3rlApbRZi26r9gqduQq4 y8GChCVjtQX0A== From: Christian Brauner Date: Fri, 06 Mar 2026 00:30:26 +0100 Subject: [PATCH RFC v2 23/23] fs: stop rewriting kthread fs structs 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: <20260306-work-kthread-nullfs-v2-23-ad1b4bed7d3e@kernel.org> References: <20260306-work-kthread-nullfs-v2-0-ad1b4bed7d3e@kernel.org> In-Reply-To: <20260306-work-kthread-nullfs-v2-0-ad1b4bed7d3e@kernel.org> To: linux-fsdevel@vger.kernel.org, Linus Torvalds Cc: linux-kernel@vger.kernel.org, Alexander Viro , Jens Axboe , Jan Kara , Tejun Heo , Jann Horn , Christian Brauner X-Mailer: b4 0.15-dev-47773 X-Developer-Signature: v=1; a=openpgp-sha256; l=634; i=brauner@kernel.org; h=from:subject:message-id; bh=7s8+VRxkVOYhZ/0V/yWyXtD+NXc+CLa2t/HYS4SO890=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWSuEuL69TOJ6a1+dZyH5Kwp+3zXad+2UU65+Ii5Nf/v+ YLdDe+mdJSyMIhxMciKKbI4tJuEyy3nqdhslKkBM4eVCWQIAxenAEyk9iojw1SOjX3mOaWlmb/i Uz7lr1H8dV3Q9tSpN+fn8zb6TWz+t5mR4be55u/IOSu90p1NTlx2LN5X78Bw/tnFZTM7rN3Zv3N 2sQAA X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Now that we isolated kthreads filesystem state completely from userspace stop rewriting their state. Signed-off-by: Christian Brauner --- fs/fs_struct.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/fs_struct.c b/fs/fs_struct.c index c1afa7513e34..74fcee814be3 100644 --- a/fs/fs_struct.c +++ b/fs/fs_struct.c @@ -61,6 +61,9 @@ void chroot_fs_refs(const struct path *old_root, const st= ruct path *new_root) =20 read_lock(&tasklist_lock); for_each_process_thread(g, p) { + if (p->flags & PF_KTHREAD) + continue; + task_lock(p); fs =3D p->fs; if (fs) { --=20 2.47.3