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GET /api/patches/74234/?format=api
{ "id": 74234, "url": "http://patchwork.dpdk.org/api/patches/74234/?format=api", "web_url": "http://patchwork.dpdk.org/project/dpdk/patch/cdb0d6482a5c3a5d7d23625d230d9ef41d657320.1594903876.git.wangyunjian@huawei.com/", "project": { "id": 1, "url": "http://patchwork.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": "<cdb0d6482a5c3a5d7d23625d230d9ef41d657320.1594903876.git.wangyunjian@huawei.com>", "list_archive_url": "https://inbox.dpdk.org/dev/cdb0d6482a5c3a5d7d23625d230d9ef41d657320.1594903876.git.wangyunjian@huawei.com", "date": "2020-07-16T13:38:09", "name": "[1/1] eal/linux: do not create user mem map repeatedly when it exists", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": true, "hash": "368bf248b58c799467b24623ed2dba89dd9fa1cb", "submitter": { "id": 551, "url": "http://patchwork.dpdk.org/api/people/551/?format=api", "name": "Yunjian Wang", "email": "wangyunjian@huawei.com" }, "delegate": { "id": 24651, "url": "http://patchwork.dpdk.org/api/users/24651/?format=api", "username": "dmarchand", "first_name": "David", "last_name": "Marchand", "email": "david.marchand@redhat.com" }, "mbox": "http://patchwork.dpdk.org/project/dpdk/patch/cdb0d6482a5c3a5d7d23625d230d9ef41d657320.1594903876.git.wangyunjian@huawei.com/mbox/", "series": [ { "id": 11095, "url": "http://patchwork.dpdk.org/api/series/11095/?format=api", "web_url": "http://patchwork.dpdk.org/project/dpdk/list/?series=11095", "date": "2020-07-16T13:38:09", "name": "[1/1] eal/linux: do not create user mem map repeatedly when it exists", "version": 1, "mbox": "http://patchwork.dpdk.org/series/11095/mbox/" } ], "comments": "http://patchwork.dpdk.org/api/patches/74234/comments/", "check": "success", "checks": "http://patchwork.dpdk.org/api/patches/74234/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 dpdk.org (dpdk.org [92.243.14.124])\n\tby inbox.dpdk.org (Postfix) with ESMTP id A8B2CA054B;\n\tThu, 16 Jul 2020 15:38:45 +0200 (CEST)", "from [92.243.14.124] (localhost [127.0.0.1])\n\tby dpdk.org (Postfix) with ESMTP id 374301D557;\n\tThu, 16 Jul 2020 15:38:44 +0200 (CEST)", "from huawei.com (szxga06-in.huawei.com [45.249.212.32])\n by dpdk.org (Postfix) with ESMTP id E40231D526;\n Thu, 16 Jul 2020 15:38:39 +0200 (CEST)", "from DGGEMS406-HUB.china.huawei.com (unknown [172.30.72.58])\n by Forcepoint Email with ESMTP id 915F35F092CE6B63138D;\n Thu, 16 Jul 2020 21:38:33 +0800 (CST)", "from localhost (10.174.185.168) by DGGEMS406-HUB.china.huawei.com\n (10.3.19.206) with Microsoft SMTP Server id 14.3.487.0; Thu, 16 Jul 2020\n 21:38:27 +0800" ], "From": "wangyunjian <wangyunjian@huawei.com>", "To": "<dev@dpdk.org>, <david.marchand@redhat.com>", "CC": "<jerry.lilijun@huawei.com>, <xudingke@huawei.com>, Yunjian Wang\n <wangyunjian@huawei.com>, <stable@dpdk.org>", "Date": "Thu, 16 Jul 2020 21:38:09 +0800", "Message-ID": "\n <cdb0d6482a5c3a5d7d23625d230d9ef41d657320.1594903876.git.wangyunjian@huawei.com>", "X-Mailer": "git-send-email 1.9.5.msysgit.1", "MIME-Version": "1.0", "Content-Type": "text/plain", "X-Originating-IP": "[10.174.185.168]", "X-CFilter-Loop": "Reflected", "Subject": "[dpdk-dev] [PATCH 1/1] eal/linux: do not create user mem map\n\trepeatedly when it exists", "X-BeenThere": "dev@dpdk.org", "X-Mailman-Version": "2.1.15", "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": "From: Yunjian Wang <wangyunjian@huawei.com>\n\nCurrently, we will create new user mem map entry for the same memory\nsegment, but in fact it has already been added to the user mem maps.\nIt's not necessary to create it twice.\n\nFixes: 0cbce3a167f1 (\"vfio: skip DMA map failure if already mapped\")\nCc: stable@dpdk.org\n\nSigned-off-by: Yunjian Wang <wangyunjian@huawei.com>\n---\n lib/librte_eal/linux/eal_vfio.c | 7 +++++++\n 1 file changed, 7 insertions(+)", "diff": "diff --git a/lib/librte_eal/linux/eal_vfio.c b/lib/librte_eal/linux/eal_vfio.c\nindex abb12a354..d8a8c39ab 100644\n--- a/lib/librte_eal/linux/eal_vfio.c\n+++ b/lib/librte_eal/linux/eal_vfio.c\n@@ -1828,6 +1828,13 @@ container_dma_map(struct vfio_config *vfio_cfg, uint64_t vaddr, uint64_t iova,\n \t\tret = -1;\n \t\tgoto out;\n \t}\n+\n+\t/* we don't need create new user mem map entry\n+\t * for the same memory segment.\n+\t */\n+\tif (errno == EBUSY || errno == EEXIST)\n+\t\tgoto out;\n+\n \t/* create new user mem map entry */\n \tnew_map = &user_mem_maps->maps[user_mem_maps->n_maps++];\n \tnew_map->addr = vaddr;\n", "prefixes": [ "1/1" ] }