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GET /api/patches/95479/?format=api
https://patches.dpdk.org/api/patches/95479/?format=api", "web_url": "https://patches.dpdk.org/project/dpdk/patch/20210707095557.315010-1-maxime.coquelin@redhat.com/", "project": { "id": 1, "url": "https://patches.dpdk.org/api/projects/1/?format=api", "name": "DPDK", "link_name": "dpdk", "list_id": "dev.dpdk.org", "list_email": "dev@dpdk.org", "web_url": "http://core.dpdk.org", "scm_url": "git://dpdk.org/dpdk", "webscm_url": "http://git.dpdk.org/dpdk", "list_archive_url": "https://inbox.dpdk.org/dev", "list_archive_url_format": "https://inbox.dpdk.org/dev/{}", "commit_url_format": "" }, "msgid": "<20210707095557.315010-1-maxime.coquelin@redhat.com>", "list_archive_url": "https://inbox.dpdk.org/dev/20210707095557.315010-1-maxime.coquelin@redhat.com", "date": "2021-07-07T09:55:57", "name": "vhost: fix assuming packed ring size is a power of 2", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": true, "hash": "c53d28a67da014c81ea26c2ed38252ff57908074", "submitter": { "id": 512, "url": "https://patches.dpdk.org/api/people/512/?format=api", "name": "Maxime Coquelin", "email": "maxime.coquelin@redhat.com" }, "delegate": null, "mbox": "https://patches.dpdk.org/project/dpdk/patch/20210707095557.315010-1-maxime.coquelin@redhat.com/mbox/", "series": [ { "id": 17692, "url": "https://patches.dpdk.org/api/series/17692/?format=api", "web_url": "https://patches.dpdk.org/project/dpdk/list/?series=17692", "date": "2021-07-07T09:55:57", "name": "vhost: fix assuming packed ring size is a power of 2", "version": 1, "mbox": "https://patches.dpdk.org/series/17692/mbox/" } ], "comments": "https://patches.dpdk.org/api/patches/95479/comments/", "check": "success", "checks": "https://patches.dpdk.org/api/patches/95479/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<dev-bounces@dpdk.org>", "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])\n\tby inbox.dpdk.org (Postfix) with ESMTP id 2AA62A0C4A;\n\tWed, 7 Jul 2021 11:56:05 +0200 (CEST)", "from [217.70.189.124] (localhost [127.0.0.1])\n\tby mails.dpdk.org (Postfix) with ESMTP id 19366406FF;\n\tWed, 7 Jul 2021 11:56:05 +0200 (CEST)", "from us-smtp-delivery-124.mimecast.com\n (us-smtp-delivery-124.mimecast.com [170.10.133.124])\n by mails.dpdk.org (Postfix) with ESMTP id A5452406B4\n for <dev@dpdk.org>; Wed, 7 Jul 2021 11:56:03 +0200 (CEST)", "from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com\n [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id\n us-mta-460-ytY4zLF4Msmn-TG-uGrixw-1; Wed, 07 Jul 2021 05:56:01 -0400", "from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com\n [10.5.11.12])\n (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))\n (No client certificate requested)\n by mimecast-mx01.redhat.com (Postfix) with ESMTPS id DDC343A42;\n Wed, 7 Jul 2021 09:56:00 +0000 (UTC)", "from max-t490s.redhat.com (unknown [10.36.110.10])\n by smtp.corp.redhat.com (Postfix) with ESMTP id 3456E60C17;\n Wed, 7 Jul 2021 09:55:59 +0000 (UTC)" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com;\n s=mimecast20190719; t=1625651763;\n h=from:from:reply-to:subject:subject:date:date:message-id:message-id:\n to:to:cc:cc:mime-version:mime-version:content-type:content-type:\n content-transfer-encoding:content-transfer-encoding;\n bh=4ao1TUV+2Bg3HgstHXfY6LgT2vWevzMdgyz8esXvJFE=;\n b=D3TErk6uv3JJIsDXDiW1M6uc0qyxQzD4C1wZ8bniE3a9cxe6HlgsXQeIVule39GcqWSWLl\n Lp/UXxoe6ITmqc0XGaAA8J5TliINZB6oq+mI8jStMB4jvbntZ04ocvm4nfrA6hCfCx5eo+\n TnkMRvb2rP66mAYS2S25xvcIgQziwwU=", "X-MC-Unique": "ytY4zLF4Msmn-TG-uGrixw-1", "From": "Maxime Coquelin <maxime.coquelin@redhat.com>", "To": "dev@dpdk.org,\n\tcheng1.jiang@intel.com,\n\tchenbo.xia@intel.com", "Cc": "Maxime Coquelin <maxime.coquelin@redhat.com>,\n\tstable@dpdk.org", "Date": "Wed, 7 Jul 2021 11:55:57 +0200", "Message-Id": "<20210707095557.315010-1-maxime.coquelin@redhat.com>", "MIME-Version": "1.0", "X-Scanned-By": "MIMEDefang 2.79 on 10.5.11.12", "Authentication-Results": "relay.mimecast.com;\n auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=maxime.coquelin@redhat.com", "X-Mimecast-Spam-Score": "0", "X-Mimecast-Originator": "redhat.com", "Content-Transfer-Encoding": "8bit", "Content-Type": "text/plain; charset=\"US-ASCII\"", "Subject": "[dpdk-dev] [PATCH] vhost: fix assuming packed ring size is a power\n of 2", "X-BeenThere": "dev@dpdk.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "DPDK patches and discussions <dev.dpdk.org>", "List-Unsubscribe": "<https://mails.dpdk.org/options/dev>,\n <mailto:dev-request@dpdk.org?subject=unsubscribe>", "List-Archive": "<http://mails.dpdk.org/archives/dev/>", "List-Post": "<mailto:dev@dpdk.org>", "List-Help": "<mailto:dev-request@dpdk.org?subject=help>", "List-Subscribe": "<https://mails.dpdk.org/listinfo/dev>,\n <mailto:dev-request@dpdk.org?subject=subscribe>", "Errors-To": "dev-bounces@dpdk.org", "Sender": "\"dev\" <dev-bounces@dpdk.org>" }, "content": "Unlike split ring, packed ring does not mandate the ring size\nto be a power of 2. So we have to use a modulo operation when\nwrapping ring index.\n\nFixes: 873e8dad6f49 (\"vhost: support packed ring in async datapath\")\nCc: stable@dpdk.org\n\nSigned-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>\n---\n lib/vhost/virtio_net.c | 2 +-\n 1 file changed, 1 insertion(+), 1 deletion(-)", "diff": "diff --git a/lib/vhost/virtio_net.c b/lib/vhost/virtio_net.c\nindex b93482587c..43011b5a2a 100644\n--- a/lib/vhost/virtio_net.c\n+++ b/lib/vhost/virtio_net.c\n@@ -2131,7 +2131,7 @@ uint16_t rte_vhost_poll_enqueue_completed(int vid, uint16_t queue_id,\n \n \tif (vq_is_packed(dev)) {\n \t\tfor (i = 0; i < n_pkts_put; i++) {\n-\t\t\tfrom = (start_idx + i) & (vq_size - 1);\n+\t\t\tfrom = (start_idx + i) % vq_size;\n \t\t\tn_buffers += pkts_info[from].nr_buffers;\n \t\t\tpkts[i] = pkts_info[from].mbuf;\n \t\t}\n", "prefixes": [] }{ "id": 95479, "url": "