Patch Comment List
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[ { "id": 81976, "web_url": "http://patches.dpdk.org/comment/81976/", "msgid": "<81ec16de-38a4-9d9d-ba33-26378fd00d63@nxp.com>", "list_archive_url": "https://inbox.dpdk.org/dev/81ec16de-38a4-9d9d-ba33-26378fd00d63@nxp.com", "date": "2018-06-08T12:08:20", "subject": "Re: [dpdk-dev] [PATCH 02/22] bus/vdev: enable one device scan", "submitter": { "id": 497, "url": "http://patches.dpdk.org/api/people/497/?format=api", "name": "Shreyansh Jain", "email": "shreyansh.jain@nxp.com" }, "content": "On 6/7/2018 6:08 PM, Qi Zhang wrote:\n> Implemented the bus ops scan_one, besides this improve the scan\n> efficiency in hotplug case, it aslo avoid sync IPC invoke (which\n ^^^^\n also\n\n> happens in vdev->scan on secondary process). The benifit is it\n ^^^^^^^\n benefit\n\n> removes the potiential deadlock in the case when secondary process\n ^^^^^^^^^^\n potential\n\n> receive a request from primary process to attach a new device, since\n> vdev->scan will be invoked on mp thread itself at this case.\n ^^^^^^^\n in that\n\n\nBesides the above spells, is it possible to re-write the commit?\nYou mention it \"...improves the scan efficiency...\" - how? Is that an \nimplicit output of introducing the new scan_one for vdev?\n\n> \n> Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>\n> ---\n> drivers/bus/vdev/vdev.c | 30 ++++++++++++++++++++++++++++++\n> 1 file changed, 30 insertions(+)\n> \n> diff --git a/drivers/bus/vdev/vdev.c b/drivers/bus/vdev/vdev.c\n> index 6139dd551..cdbd77df0 100644\n> --- a/drivers/bus/vdev/vdev.c\n> +++ b/drivers/bus/vdev/vdev.c\n> @@ -467,6 +467,35 @@ vdev_scan(void)\n> \treturn 0;\n> }\n> \n\n[...]", "headers": { "Return-Path": "<dev-bounces@dpdk.org>", "X-Original-To": "patchwork@dpdk.org", "Delivered-To": "patchwork@dpdk.org", "Received": [ "from [92.243.14.124] (localhost [127.0.0.1])\n\tby dpdk.org (Postfix) with ESMTP id 17D826841;\n\tFri, 8 Jun 2018 14:08:41 +0200 (CEST)", "from EUR04-DB3-obe.outbound.protection.outlook.com\n\t(mail-eopbgr60040.outbound.protection.outlook.com [40.107.6.40])\n\tby dpdk.org (Postfix) with ESMTP id D77ED5F72\n\tfor <dev@dpdk.org>; Fri, 8 Jun 2018 14:08:39 +0200 (CEST)", "from [10.232.40.129] (14.142.187.166) by\n\tAM5PR0402MB2770.eurprd04.prod.outlook.com (2603:10a6:203:98::12) with\n\tMicrosoft SMTP Server (version=TLS1_2,\n\tcipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.841.16;\n\tFri, 8 Jun 2018 12:08:35 +0000" ], "DKIM-Signature": "v=1; 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SFP:1101; SCL:1; SRVR:AM5PR0402MB2770; H:[10.232.40.129];\n\tFPR:; \n\tSPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:1; ", "Received-SPF": "None (protection.outlook.com: nxp.com does not designate\n\tpermitted sender hosts)", "X-Microsoft-Antispam-Message-Info": "jPe5Vp08gITminQ0D81srF/ickohNkNBKeIAnKrvNIt9FyJEdUsz/pzJyLnGZ4MXS/KG1cVMd0Hvw+T+H72Wulf9858GZwTdnlh+iSeADw48ziCX3eUWERQ0ZW283pYkZv2ZWN54xS+4B2gxJVZhO3/9y5x9SHIuOQECQYJONBopRoFeztpYfvOYd+0giq6Z", "SpamDiagnosticOutput": "1:99", "SpamDiagnosticMetadata": "NSPM", "X-MS-Office365-Filtering-Correlation-Id": "4a97dd36-76df-43e8-6caf-08d5cd389160", "X-OriginatorOrg": "nxp.com", "X-MS-Exchange-CrossTenant-OriginalArrivalTime": "08 Jun 2018 12:08:35.2515\n\t(UTC)", "X-MS-Exchange-CrossTenant-Network-Message-Id": "4a97dd36-76df-43e8-6caf-08d5cd389160", "X-MS-Exchange-CrossTenant-FromEntityHeader": "Hosted", "X-MS-Exchange-CrossTenant-Id": "686ea1d3-bc2b-4c6f-a92c-d99c5c301635", "X-MS-Exchange-Transport-CrossTenantHeadersStamped": "AM5PR0402MB2770", "Subject": "Re: [dpdk-dev] [PATCH 02/22] bus/vdev: enable one device scan", "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://dpdk.org/ml/options/dev>,\n\t<mailto:dev-request@dpdk.org?subject=unsubscribe>", "List-Archive": "<http://dpdk.org/ml/archives/dev/>", "List-Post": "<mailto:dev@dpdk.org>", "List-Help": "<mailto:dev-request@dpdk.org?subject=help>", "List-Subscribe": "<https://dpdk.org/ml/listinfo/dev>,\n\t<mailto:dev-request@dpdk.org?subject=subscribe>", "Errors-To": "dev-bounces@dpdk.org", "Sender": "\"dev\" <dev-bounces@dpdk.org>" }, "addressed": null }, { "id": 82134, "web_url": "http://patches.dpdk.org/comment/82134/", "msgid": "<039ED4275CED7440929022BC67E7061153237739@SHSMSX103.ccr.corp.intel.com>", "list_archive_url": "https://inbox.dpdk.org/dev/039ED4275CED7440929022BC67E7061153237739@SHSMSX103.ccr.corp.intel.com", "date": "2018-06-13T13:32:48", "subject": "Re: [dpdk-dev] [PATCH 02/22] bus/vdev: enable one device scan", "submitter": { "id": 504, "url": "http://patches.dpdk.org/api/people/504/?format=api", "name": "Qi Zhang", "email": "qi.z.zhang@intel.com" }, "content": "> -----Original Message-----\n> From: Shreyansh Jain [mailto:shreyansh.jain@nxp.com]\n> Sent: Friday, June 8, 2018 8:08 PM\n> To: Zhang, Qi Z <qi.z.zhang@intel.com>\n> Cc: thomas@monjalon.net; Burakov, Anatoly <anatoly.burakov@intel.com>;\n> Ananyev, Konstantin <konstantin.ananyev@intel.com>; dev@dpdk.org;\n> Richardson, Bruce <bruce.richardson@intel.com>; Yigit, Ferruh\n> <ferruh.yigit@intel.com>; Shelton, Benjamin H\n> <benjamin.h.shelton@intel.com>; Vangati, Narender\n> <narender.vangati@intel.com>\n> Subject: Re: [dpdk-dev] [PATCH 02/22] bus/vdev: enable one device scan\n> \n> On 6/7/2018 6:08 PM, Qi Zhang wrote:\n> > Implemented the bus ops scan_one, besides this improve the scan\n> > efficiency in hotplug case, it aslo avoid sync IPC invoke (which\n> ^^^^\n> also\n> \n> > happens in vdev->scan on secondary process). The benifit is it\n> ^^^^^^^\n> benefit\n> \n> > removes the potiential deadlock in the case when secondary process\n> ^^^^^^^^^^\n> potential\n> \n> > receive a request from primary process to attach a new device, since\n> > vdev->scan will be invoked on mp thread itself at this case.\n> ^^^^^^^\n> in that\n> \n> \n> Besides the above spells, is it possible to re-write the commit?\n> You mention it \"...improves the scan efficiency...\" - how? Is that an implicit\n> output of introducing the new scan_one for vdev?\n\n\"Improve scan efficiency\" should be general to all buses in hot plug case.\nsince compare to bus->scan, bus->scan_one no need to iterate all devargs.\nBut yes, it's not the original purpose for this patch set, but a bonus.\n\nI will re-write comment with below format to make it more clear.\nThe patch implemented bus ops scan_one for vdev, it gives two benefits\n1. improve scan efficiency ....\n2. avoid sync IPC invoke .....\n\nRegards\nQi\n\n> \n> >\n> > Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>\n> > ---\n> > drivers/bus/vdev/vdev.c | 30 ++++++++++++++++++++++++++++++\n> > 1 file changed, 30 insertions(+)\n> >\n> > diff --git a/drivers/bus/vdev/vdev.c b/drivers/bus/vdev/vdev.c index\n> > 6139dd551..cdbd77df0 100644\n> > --- a/drivers/bus/vdev/vdev.c\n> > +++ b/drivers/bus/vdev/vdev.c\n> > @@ -467,6 +467,35 @@ vdev_scan(void)\n> > \treturn 0;\n> > }\n> >\n> \n> [...]", "headers": { "Return-Path": "<dev-bounces@dpdk.org>", "X-Original-To": "patchwork@dpdk.org", "Delivered-To": "patchwork@dpdk.org", "Received": [ "from [92.243.14.124] (localhost [127.0.0.1])\n\tby dpdk.org (Postfix) with ESMTP id 2F5471EF8A;\n\tWed, 13 Jun 2018 15:32:54 +0200 (CEST)", "from mga06.intel.com (mga06.intel.com [134.134.136.31])\n\tby dpdk.org (Postfix) with ESMTP id D7EAB1EF89\n\tfor <dev@dpdk.org>; Wed, 13 Jun 2018 15:32:52 +0200 (CEST)", "from orsmga005.jf.intel.com ([10.7.209.41])\n\tby orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384;\n\t13 Jun 2018 06:32:51 -0700", "from fmsmsx108.amr.corp.intel.com ([10.18.124.206])\n\tby orsmga005.jf.intel.com with ESMTP; 13 Jun 2018 06:32:51 -0700", "from fmsmsx112.amr.corp.intel.com (10.18.116.6) by\n\tFMSMSX108.amr.corp.intel.com (10.18.124.206) with Microsoft SMTP\n\tServer (TLS) id 14.3.319.2; Wed, 13 Jun 2018 06:32:51 -0700", "from shsmsx102.ccr.corp.intel.com (10.239.4.154) by\n\tFMSMSX112.amr.corp.intel.com (10.18.116.6) with Microsoft SMTP Server\n\t(TLS) id 14.3.319.2; Wed, 13 Jun 2018 06:32:50 -0700", "from shsmsx103.ccr.corp.intel.com ([169.254.4.51]) by\n\tshsmsx102.ccr.corp.intel.com ([169.254.2.223]) with mapi id\n\t14.03.0319.002; Wed, 13 Jun 2018 21:32:48 +0800" ], "X-Amp-Result": "SKIPPED(no attachment in message)", "X-Amp-File-Uploaded": "False", "X-ExtLoop1": "1", "X-IronPort-AV": "E=Sophos;i=\"5.51,218,1526367600\"; d=\"scan'208\";a=\"232264854\"", "From": "\"Zhang, Qi Z\" <qi.z.zhang@intel.com>", "To": "Shreyansh Jain <shreyansh.jain@nxp.com>", "CC": "\"thomas@monjalon.net\" <thomas@monjalon.net>, \"Burakov, Anatoly\"\n\t<anatoly.burakov@intel.com>, \"Ananyev, Konstantin\"\n\t<konstantin.ananyev@intel.com>, \"dev@dpdk.org\" <dev@dpdk.org>,\n\t\"Richardson, Bruce\" <bruce.richardson@intel.com>, \"Yigit, Ferruh\"\n\t<ferruh.yigit@intel.com>, \"Shelton, Benjamin H\"\n\t<benjamin.h.shelton@intel.com>, \"Vangati, Narender\"\n\t<narender.vangati@intel.com>", "Thread-Topic": "[dpdk-dev] [PATCH 02/22] bus/vdev: enable one device scan", "Thread-Index": "AQHT/lx7R1ren+J2PUqFWouqUNSW1KRVv/IAgAhzpQA=", "Date": "Wed, 13 Jun 2018 13:32:48 +0000", "Message-ID": "<039ED4275CED7440929022BC67E7061153237739@SHSMSX103.ccr.corp.intel.com>", "References": "<20180607123849.14439-1-qi.z.zhang@intel.com>\n\t<20180607123849.14439-3-qi.z.zhang@intel.com>\n\t<81ec16de-38a4-9d9d-ba33-26378fd00d63@nxp.com>", "In-Reply-To": "<81ec16de-38a4-9d9d-ba33-26378fd00d63@nxp.com>", "Accept-Language": "en-US", "Content-Language": "en-US", "X-MS-Has-Attach": "", "X-MS-TNEF-Correlator": "", "x-titus-metadata-40": "eyJDYXRlZ29yeUxhYmVscyI6IiIsIk1ldGFkYXRhIjp7Im5zIjoiaHR0cDpcL1wvd3d3LnRpdHVzLmNvbVwvbnNcL0ludGVsMyIsImlkIjoiNDkxOWY0YWUtNGE1OC00YzZjLTg3ZTUtMjlkMTJjNTk5ZTJkIiwicHJvcHMiOlt7Im4iOiJDVFBDbGFzc2lmaWNhdGlvbiIsInZhbHMiOlt7InZhbHVlIjoiQ1RQX05UIn1dfV19LCJTdWJqZWN0TGFiZWxzIjpbXSwiVE1DVmVyc2lvbiI6IjE3LjEwLjE4MDQuNDkiLCJUcnVzdGVkTGFiZWxIYXNoIjoiNk16bk15VEx5MjArSmtDOWFmT1J6Zk9kakswXC9JcWplWVhudFZHTzA1Rlh4djVQYlZYMnd2SzFDd2Jkemh0WWMifQ==", "x-ctpclassification": "CTP_NT", "dlp-product": "dlpe-windows", "dlp-version": "11.0.200.100", "dlp-reaction": "no-action", "x-originating-ip": "[10.239.127.40]", "Content-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "base64", "MIME-Version": "1.0", "Subject": "Re: [dpdk-dev] [PATCH 02/22] bus/vdev: enable one device scan", "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://dpdk.org/ml/options/dev>,\n\t<mailto:dev-request@dpdk.org?subject=unsubscribe>", "List-Archive": "<http://dpdk.org/ml/archives/dev/>", "List-Post": "<mailto:dev@dpdk.org>", "List-Help": "<mailto:dev-request@dpdk.org?subject=help>", "List-Subscribe": "<https://dpdk.org/ml/listinfo/dev>,\n\t<mailto:dev-request@dpdk.org?subject=subscribe>", "Errors-To": "dev-bounces@dpdk.org", "Sender": "\"dev\" <dev-bounces@dpdk.org>" }, "addressed": null } ]