From patchwork Mon Apr 11 11:00:05 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Marchand X-Patchwork-Id: 109579 Return-Path: X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 80F96A0093; Mon, 11 Apr 2022 13:00:23 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 7384E4114D; Mon, 11 Apr 2022 13:00:23 +0200 (CEST) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by mails.dpdk.org (Postfix) with ESMTP id AEF1740F35 for ; Mon, 11 Apr 2022 13:00:22 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1649674822; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=1sYDCEGSntc9QQdI0aZrXjKbkxWAAW0ypyDYJcC9wOM=; b=ctKjIXIePJf4apLJBBChfM201lBkPAjVVk4yQo5ArAX4V8RhpqQmZKUo/edzGEuhlXOjUk wo36FMH44/JV/tdg2KiTMCdLTMhz5y+GtBQfD+nEyAMRSIwYwhJKxSyUotSiTue8SPYZQw jTJeJLx4/Q9/mcb0X0FSG4pTMzJFhX8= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-520-dJS9gjj5N06DMagPCic0CQ-1; Mon, 11 Apr 2022 07:00:21 -0400 X-MC-Unique: dJS9gjj5N06DMagPCic0CQ-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 93519811E76; Mon, 11 Apr 2022 11:00:20 +0000 (UTC) Received: from dmarchan.remote.csb (unknown [10.40.192.83]) by smtp.corp.redhat.com (Postfix) with ESMTP id 28AF7145B989; Mon, 11 Apr 2022 11:00:19 +0000 (UTC) From: David Marchand To: dev@dpdk.org Cc: maxime.coquelin@redhat.com, stephen@networkplumber.org, chenbo.xia@intel.com, jiayu.hu@intel.com, yuanx.wang@intel.com, xuan.ding@intel.com Subject: [RFC PATCH v3 0/8] vhost lock annotations Date: Mon, 11 Apr 2022 13:00:05 +0200 Message-Id: <20220411110013.18624-1-david.marchand@redhat.com> In-Reply-To: <20220328121758.26632-1-david.marchand@redhat.com> References: <20220328121758.26632-1-david.marchand@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.85 on 10.11.54.7 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=david.marchand@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org vhost internals involves multiple locks to protect data access by multiple threads. This series is a try at using clang thread safety checks [1] to catch issues during compilation: EAL spinlock and rwlock are annotated and vhost code is instrumented so that clang can statically check correctness. This is still a work in progress (some documentation and a release note update are missing). Those annotations are quite heavy to maintain because the full path of code must be annotated, but I think it is worth using. 1: https://clang.llvm.org/docs/ThreadSafetyAnalysis.html Depends-on: patch-108840 ("vhost: fix missing virtqueue lock protection")