From patchwork Sun Feb 23 15:36:16 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cindy Lu X-Patchwork-Id: 13987069 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 EF25020C008 for ; Sun, 23 Feb 2025 15:41:02 +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=1740325266; cv=none; b=crK9N2Q5l7KaP3m9FxEOtBgj8V6j8t3cZ2yKhG8ZMEqX69EhPM/Jsir/teEXzNfQrzPlEjkwRF/EyF8WelKAAJlfxTeFOWCDizHTJzacAB5iVCK3u8Zhj1VCG1EV0Q6n706NaG9MBApYafEP6MOJxntODO1y4QGy8IlT2Ky9Ol8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740325266; c=relaxed/simple; bh=jZWHDBC1em9YSxJA7OCoxzWdArjA3A0TYOkpGg7ZSRk=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Ycx4tYde8nBm+gSIgzaxV86T/CGKbR93OiEG/LU0puDi49sGeS6uY/ed4vav8SJU/rZS0417kCKI+1lXDnT20QjGbkRgy5ABsNpkCjqoYNs9IIGS72n2m7NNIj2ynU9VXpfosOTgK2UPjMUYsQwEBdPqE6mLye9S98SdT9RgcTs= 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=ZbNvG7fy; 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="ZbNvG7fy" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1740325261; 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=ZbNvG7fyFWL7/2dRBOJIh2gj3lWcKDZxyc6QdyMNTFC/Zo1luQWO3HALto40CF7azBfHxL RpGhe156BnbpfLdWm/zAb2TW2kkhAlD7HqQdhZM/nkuN/+6PLXX07NQPExU7iCqBn5ywtE LayxGbNgTptolJvYRPjiI5zd35tBof0= Received: from mx-prod-mc-05.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-679-urbtvVcWOyqwV6w3ExLEig-1; Sun, 23 Feb 2025 10:40:57 -0500 X-MC-Unique: urbtvVcWOyqwV6w3ExLEig-1 X-Mimecast-MFC-AGG-ID: urbtvVcWOyqwV6w3ExLEig_1740325256 Received: from mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.40]) (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-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 3E03819560B5; Sun, 23 Feb 2025 15:40:56 +0000 (UTC) Received: from server.redhat.com (unknown [10.72.112.28]) by mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id C04D419412A3; Sun, 23 Feb 2025 15:40:51 +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 v6 1/6] vhost: Add a new parameter in vhost_dev to allow user select kthread Date: Sun, 23 Feb 2025 23:36:16 +0800 Message-ID: <20250223154042.556001-2-lulu@redhat.com> In-Reply-To: <20250223154042.556001-1-lulu@redhat.com> References: <20250223154042.556001-1-lulu@redhat.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 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 = byte_weight; dev->use_worker = use_worker; dev->msg_handler = msg_handler; + dev->inherit_owner = 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); };