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GET /api/patches/97332/?format=api
{ "id": 97332, "url": "http://patchwork.dpdk.org/api/patches/97332/?format=api", "web_url": "http://patchwork.dpdk.org/project/dpdk/patch/20210825112700.83810-1-xuan.ding@intel.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": "<20210825112700.83810-1-xuan.ding@intel.com>", "list_archive_url": "https://inbox.dpdk.org/dev/20210825112700.83810-1-xuan.ding@intel.com", "date": "2021-08-25T11:27:00", "name": "doc: announce change in dma mapping/unmapping", "commit_ref": null, "pull_url": null, "state": "rejected", "archived": true, "hash": "670382998026d8ece0332d493dadfe5139f07cf2", "submitter": { "id": 1401, "url": "http://patchwork.dpdk.org/api/people/1401/?format=api", "name": "Ding, Xuan", "email": "xuan.ding@intel.com" }, "delegate": { "id": 1, "url": "http://patchwork.dpdk.org/api/users/1/?format=api", "username": "tmonjalo", "first_name": "Thomas", "last_name": "Monjalon", "email": "thomas@monjalon.net" }, "mbox": "http://patchwork.dpdk.org/project/dpdk/patch/20210825112700.83810-1-xuan.ding@intel.com/mbox/", "series": [ { "id": 18451, "url": "http://patchwork.dpdk.org/api/series/18451/?format=api", "web_url": "http://patchwork.dpdk.org/project/dpdk/list/?series=18451", "date": "2021-08-25T11:27:00", "name": "doc: announce change in dma mapping/unmapping", "version": 1, "mbox": "http://patchwork.dpdk.org/series/18451/mbox/" } ], "comments": "http://patchwork.dpdk.org/api/patches/97332/comments/", "check": "fail", "checks": "http://patchwork.dpdk.org/api/patches/97332/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 527F9A0C53;\n\tWed, 25 Aug 2021 13:37:30 +0200 (CEST)", "from [217.70.189.124] (localhost [127.0.0.1])\n\tby mails.dpdk.org (Postfix) with ESMTP id C28EC40041;\n\tWed, 25 Aug 2021 13:37:29 +0200 (CEST)", "from mga02.intel.com (mga02.intel.com [134.134.136.20])\n by mails.dpdk.org (Postfix) with ESMTP id 7B00A4003D\n for <dev@dpdk.org>; Wed, 25 Aug 2021 13:37:28 +0200 (CEST)", "from fmsmga008.fm.intel.com ([10.253.24.58])\n by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384;\n 25 Aug 2021 04:37:27 -0700", "from dpdk-xuanding-dev2.sh.intel.com ([10.67.119.115])\n by fmsmga008.fm.intel.com with ESMTP; 25 Aug 2021 04:37:25 -0700" ], "X-IronPort-AV": [ "E=McAfee;i=\"6200,9189,10086\"; a=\"204703000\"", "E=Sophos;i=\"5.84,350,1620716400\"; d=\"scan'208\";a=\"204703000\"", "E=Sophos;i=\"5.84,350,1620716400\"; d=\"scan'208\";a=\"494217041\"" ], "X-ExtLoop1": "1", "From": "Xuan Ding <xuan.ding@intel.com>", "To": "dev@dpdk.org, anatoly.burakov@intel.com, maxime.coquelin@redhat.com,\n chenbo.xia@intel.com", "Cc": "ferruh.yigit@intel.com, jiayu.hu@intel.com, bruce.richardson@intel.com,\n Xuan Ding <xuan.ding@intel.com>", "Date": "Wed, 25 Aug 2021 11:27:00 +0000", "Message-Id": "<20210825112700.83810-1-xuan.ding@intel.com>", "X-Mailer": "git-send-email 2.17.1", "Subject": "[dpdk-dev] [PATCH] doc: announce change in dma mapping/unmapping", "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": "Currently, the VFIO subsystem will compact adjacent DMA regions for the\npurposes of saving space in the internal list of mappings. This has a\nside effect of compacting two separate mappings that just happen to be\nadjacent in memory. Since VFIO implementation on IA platforms also does\nnot allow partial unmapping of memory mapped for DMA, the current DPDK\nVFIO implementation will prevent unmapping of accidentally adjacent\nmaps even though it could have been unmapped [1].\n\nThe proper fix for this issue is to change the VFIO DMA mapping API to\nalso include page size, and always map memory page-by-page.\n\n[1] https://mails.dpdk.org/archives/dev/2021-July/213493.html\n\nSigned-off-by: Xuan Ding <xuan.ding@intel.com>\n---\n doc/guides/rel_notes/deprecation.rst | 3 +++\n 1 file changed, 3 insertions(+)", "diff": "diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst\nindex 76a4abfd6b..272ffa993e 100644\n--- a/doc/guides/rel_notes/deprecation.rst\n+++ b/doc/guides/rel_notes/deprecation.rst\n@@ -287,3 +287,6 @@ Deprecation Notices\n reserved bytes to 2 (from 3), and use 1 byte to indicate warnings and other\n information from the crypto/security operation. This field will be used to\n communicate events such as soft expiry with IPsec in lookaside mode.\n+\n+ * vfio: the functions `rte_vfio_container_dma_map` and `rte_vfio_container_dma_unmap`\n+ will be amended to include page size. This change is targeted for DPDK 21.11.\n", "prefixes": [] }