From nobody Thu Dec 18 05:24:33 2025 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 005252327A7 for ; Tue, 10 Dec 2024 16:45:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733849114; cv=none; b=bhYZfp9ho0H+qeIZj+UdWY4JCjn4ky8V1rJEvVa35fWUKnSa0H97u0ps2oWjw9WhwwYHNoz3avwaZZThn5UIlX4wwkds1vt0fiz0VoNkHUINiOgQprCDhK1fCbXKXBAO55YDLmmJbGC+rTxMZBGNwgtzmUbGuKXHT9ODkUTB2nI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733849114; c=relaxed/simple; bh=jZWHDBC1em9YSxJA7OCoxzWdArjA3A0TYOkpGg7ZSRk=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mfcTtjcTM1p5om50LKaV9ZE/Y9GRx5jwbvoZnSFfYGdzPjMyU6xLxqzgWAQUA4Om2GTrHJXjDspZeEH2rGSRnNBRsQzVEvuQCgK76c7WYk+PnBX018jtyDfILIl9f0YhcAAwMwkZ1/M5G/LDkDvrNepz1hLWqbU4Km1w/Tg6iOs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=ELpVI56O; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="ELpVI56O" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1733849111; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Kx5deBxNNDBqr/ibOJLZi9NoxS8td60GQR/dfMsL+Dk=; b=ELpVI56OI6M2CZEq9guCquGNQpzlo2endSyreC6tpsFM2pgdEryd2OkgpbkrxiK2a77ZA/ Sc6czGWoUHI8seAj0GjxjzPjgoYp/57/EyW1W/0WQGjOTQm4zhoVh3kLC4S5O3aojqU0B3 B+/P7e/8pUDKYb//qZZspFkrf5eUI1s= Received: from mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-689-JlGozaCIM8eXm6SCrWnjag-1; Tue, 10 Dec 2024 11:45:10 -0500 X-MC-Unique: JlGozaCIM8eXm6SCrWnjag-1 X-Mimecast-MFC-AGG-ID: JlGozaCIM8eXm6SCrWnjag Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id B943219560BF; Tue, 10 Dec 2024 16:45:09 +0000 (UTC) Received: from server.redhat.com (unknown [10.72.112.152]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 6C9F619560A2; Tue, 10 Dec 2024 16:45:05 +0000 (UTC) From: Cindy Lu To: lulu@redhat.com, jasowang@redhat.com, mst@redhat.com, michael.christie@oracle.com, sgarzare@redhat.com, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org Subject: [PATCH v4 1/8] vhost: Add a new parameter in vhost_dev to allow user select kthread Date: Wed, 11 Dec 2024 00:41:40 +0800 Message-ID: <20241210164456.925060-2-lulu@redhat.com> In-Reply-To: <20241210164456.925060-1-lulu@redhat.com> References: <20241210164456.925060-1-lulu@redhat.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-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 Content-Type: text/plain; charset="utf-8" The vhost now uses vhost_task and workers as a child of the owner thread. While this aligns with containerization principles,it confuses some legacy userspace app, Therefore, we are reintroducing kthread API support. Introduce a new parameter to enable users to choose between kthread and task mode. Signed-off-by: Cindy Lu --- drivers/vhost/vhost.c | 1 + drivers/vhost/vhost.h | 1 + 2 files changed, 2 insertions(+) diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index 9ac25d08f473..eaddbd39c29b 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -552,6 +552,7 @@ void vhost_dev_init(struct vhost_dev *dev, dev->byte_weight =3D byte_weight; dev->use_worker =3D use_worker; dev->msg_handler =3D msg_handler; + dev->inherit_owner =3D true; init_waitqueue_head(&dev->wait); INIT_LIST_HEAD(&dev->read_list); INIT_LIST_HEAD(&dev->pending_list); diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h index bb75a292d50c..c650c4506c70 100644 --- a/drivers/vhost/vhost.h +++ b/drivers/vhost/vhost.h @@ -176,6 +176,7 @@ struct vhost_dev { int byte_weight; struct xarray worker_xa; bool use_worker; + bool inherit_owner; int (*msg_handler)(struct vhost_dev *dev, u32 asid, struct vhost_iotlb_msg *msg); }; --=20 2.45.0