From nobody Mon Feb 9 17:35:33 2026 Received: from sender4-op-o15.zoho.com (sender4-op-o15.zoho.com [136.143.188.15]) (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 EB5FA3346AC; Tue, 6 Jan 2026 14:51:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=136.143.188.15 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767711109; cv=pass; b=Yr2jFsuYKdG8o/+614s1F0Bkhqw/WU3sDawjqC4Q0uOhcqzdFuqj2pi1SbW++9zQdBlUUAA8drb2X7XGqBc01+uM3vrpuF5RpJu7tBRdS2SNy/VTcEEkIt7svvPHbMmpjZJVkyspjCMgJFeqctbyxX8/Oe+t+GdrnrnTg0Nd7bo= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767711109; c=relaxed/simple; bh=pOevL+J7q+1CcY0mMmItyc9+v/qdrrMMr3syYm2BUjA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=m+q5NUjTjajgRV4caeFfeHmZMfu2t+voGPxgUStrcaY9I6pVO4C3SgZ41G16r6Thz8xFpmGRgci96lCxBRJ9u04B+58XmT2/V9q1lDyh6oOn1UEW7HcYcCJ0PiNuWoAr3VneA9l2odHEtNRXmLNFiDoJ/P7tKPVYRGjvX4kVwIo= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=laveeshbansal.com; spf=pass smtp.mailfrom=laveeshbansal.com; dkim=pass (1024-bit key) header.d=laveeshbansal.com header.i=laveeshb@laveeshbansal.com header.b=LTjjmONV; arc=pass smtp.client-ip=136.143.188.15 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=laveeshbansal.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=laveeshbansal.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=laveeshbansal.com header.i=laveeshb@laveeshbansal.com header.b="LTjjmONV" ARC-Seal: i=1; a=rsa-sha256; t=1767711065; cv=none; d=zohomail.com; s=zohoarc; b=bRJnTZjv5X9F9j+IVfw92VnW7NSjXH7J0U3ooNlfVImIGxw5f3/S6+W3QRbJJegsTfYlgvZBVFBoYnsjt0P6BO4JhLmRPLl61T/+JGuG9McFvZfuB9y2oUm9xW9PXvlrVd/bDeCFvCGudlNTLx/voreoFfjNso0YEoVGcF8eWmg= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1767711065; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:Subject:To:To:Message-Id:Reply-To; bh=6KyVd/UMlOeq15tNM8m23IFXXj+MVBVuPZUOQSxgyPk=; b=j5ktmlP50a6Iy6dRawgWjBZBSaYJ10KCsZLCZ3afETILbfqrI5p1r1Hjjnl0/43l2Grw+KUIIOZN9/BTJIDQ51nGSHWQvYpHEnlgKNoZSyRGEjufLTn37C134OGeoLZics8/n0TtWXiQJm7Mxzwf/AWKxxz8O7DX71svxsM9WfY= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=laveeshbansal.com; spf=pass smtp.mailfrom=laveeshb@laveeshbansal.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1767711065; s=zoho; d=laveeshbansal.com; i=laveeshb@laveeshbansal.com; h=From:From:To:To:Cc:Cc:Subject:Subject:Date:Date:Message-ID:In-Reply-To:References:MIME-Version:Content-Transfer-Encoding:Message-Id:Reply-To; bh=6KyVd/UMlOeq15tNM8m23IFXXj+MVBVuPZUOQSxgyPk=; b=LTjjmONViBp+m3MNntTu1dXNyI8uw29Nj7DtvevB7ecjCmGpXtVvW8W61i/nzSor ThI2b3njHmSV63Tu6JuA6QeqJSdPkXBP7W6/iGK2vVBMN7udPoXBh2vXB34x6o/LPxc ncZA3d0lHIQCaJJJl5oDUGLGOcEhk+FRW7tCe8jo= Received: by mx.zohomail.com with SMTPS id 1767711061072771.7293821920516; Tue, 6 Jan 2026 06:51:01 -0800 (PST) From: Laveesh Bansal To: viro@zeniv.linux.org.uk, brauner@kernel.org Cc: jack@suse.cz, tytso@mit.edu, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, Laveesh Bansal Subject: [PATCH v2 2/2] docs: clarify that dirtytime_expire_seconds=0 disables writeback Date: Tue, 6 Jan 2026 14:50:59 +0000 Message-ID: <20260106145059.543282-3-laveeshb@laveeshbansal.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260106145059.543282-1-laveeshb@laveeshbansal.com> References: <20260106145059.543282-1-laveeshb@laveeshbansal.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMailClient: External Content-Type: text/plain; charset="utf-8" Document that setting vm.dirtytime_expire_seconds to zero disables periodic dirtytime writeback, matching the behavior of the related dirty_writeback_centisecs sysctl which already documents this. Signed-off-by: Laveesh Bansal Reviewed-by: Jan Kara --- Documentation/admin-guide/sysctl/vm.rst | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/admin-guide/sysctl/vm.rst b/Documentation/admin-= guide/sysctl/vm.rst index 4d71211fdad8..e2fdbc521033 100644 --- a/Documentation/admin-guide/sysctl/vm.rst +++ b/Documentation/admin-guide/sysctl/vm.rst @@ -231,6 +231,8 @@ eventually gets pushed out to disk. This tunable is us= ed to define when dirty inode is old enough to be eligible for writeback by the kernel flusher thr= eads. And, it is also used as the interval to wakeup dirtytime_writeback thread. =20 +Setting this to zero disables periodic dirtytime writeback. + =20 dirty_writeback_centisecs =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D --=20 2.43.0