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Petersen" , Sasha Levin Subject: [PATCH AUTOSEL for 4.14 43/84] scsi: ses: don't ask for diagnostic pages repeatedly during probe Thread-Topic: [PATCH AUTOSEL for 4.14 43/84] scsi: ses: don't ask for diagnostic pages repeatedly during probe Thread-Index: AQHTsz6qcOKhvYRYnkCQ7BJHI+QE3Q== Date: Sat, 3 Mar 2018 22:26:24 +0000 Message-ID: <20180303222518.26271-43-alexander.levin@microsoft.com> References: <20180303222518.26271-1-alexander.levin@microsoft.com> In-Reply-To: <20180303222518.26271-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;MW2PR2101MB0970;7:S75vGJZG5NYhs4P9wHvpZfvkRo5eZWdbnf0ZVAh+l02kBg7hnP9bTOPIAXEApnR7bpAzGd0HYqf1BBlc6cXYkK+oBueBLqNAxO2fm2CFALydFpzR3wtZxyCv+/ABPBpXr82Hg3WpggjzOnOHein8ELZzcKZ9bTqWHOkdil1Fy6T5jQ9rqaBIWelV6gwHmSBySGQxkxR7DEK7pYFJDRPDEtoThf98tux98rUWsjqsn9kfvYEvmKCthB059WFr7C8s x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: 61237500-13f4-46f3-c506-08d581562d6d x-microsoft-antispam: UriScan:(43697045539745)(38994716169672)(222181515654134);BCL:0;PCL:0;RULEID:(7020095)(4652020)(4534165)(4627221)(201703031133081)(201702281549075)(48565401081)(5600026)(4604075)(3008032)(2017052603307)(7193020);SRVR:MW2PR2101MB0970; x-ms-traffictypediagnostic: MW2PR2101MB0970: authentication-results: spf=none (sender IP is ) smtp.mailfrom=Alexander.Levin@microsoft.com; x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:(28532068793085)(227479698468861)(43697045539745)(89211679590171)(38994716169672)(146099531331640)(222181515654134); x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(8211001083)(61425038)(6040501)(2401047)(5005006)(8121501046)(93006095)(93001095)(10201501046)(3002001)(3231220)(944501244)(52105095)(6055026)(61426038)(61427038)(6041288)(20161123562045)(20161123558120)(20161123560045)(20161123564045)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(6072148)(201708071742011);SRVR:MW2PR2101MB0970;BCL:0;PCL:0;RULEID:;SRVR:MW2PR2101MB0970; x-forefront-prvs: 0600F93FE1 x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(376002)(39380400002)(366004)(396003)(39860400002)(346002)(199004)(189003)(575784001)(86362001)(110136005)(4326008)(6506007)(14454004)(99286004)(8936002)(1076002)(36756003)(2906002)(102836004)(76176011)(25786009)(6486002)(316002)(478600001)(3280700002)(107886003)(186003)(54906003)(26005)(81166006)(7736002)(8676002)(6512007)(81156014)(305945005)(72206003)(6436002)(53936002)(6116002)(6666003)(86612001)(68736007)(3846002)(2950100002)(3660700001)(10290500003)(22452003)(10090500001)(2900100001)(106356001)(2501003)(66066001)(97736004)(5660300001)(5250100002)(105586002)(22906009)(217873001);DIR:OUT;SFP:1102;SCL:1;SRVR:MW2PR2101MB0970;H:MW2PR2101MB1034.namprd21.prod.outlook.com;FPR:;SPF:None;PTR:InfoNoRecords;A:1;MX:1;LANG:en; x-microsoft-antispam-message-info: PVB2FoXEVBFBIuJQKLPoKbv8i0ocEUSWOl/ZtsQU1auhG0aGRoEFtUkl8bpLjZJjaciabq/P7j6OEAiumii0LwxMGHYVmoJPWDuvS5OPlcmj4wz0DFbl8cyneUQtuEGsJyrksHIvOWblAzNeNASMEPNcOz/H3xk8+T7GldNgXso= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 61237500-13f4-46f3-c506-08d581562d6d X-MS-Exchange-CrossTenant-originalarrivaltime: 03 Mar 2018 22:26:24.6973 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW2PR2101MB0970 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: From: Li Dongyang [ Upstream commit 9c0a50022b8ac7e863e6ec8342fa476fe5d1d75c ] We are testing if there is a match with the ses device in a loop by calling ses_match_to_enclosure(), which will issue scsi receive diagnostics commands to the ses device for every device on the same host. On one of our boxes with 840 disks, it takes a long time to load the driver: [root@g1b-oss06 ~]# time modprobe ses real 40m48.247s user 0m0.001s sys 0m0.196s With the patch: [root@g1b-oss06 ~]# time modprobe ses real 0m17.915s user 0m0.008s sys 0m0.053s Note that we still need to refresh page 10 when we see a new disk to create the link. Signed-off-by: Li Dongyang Tested-by: Jason Ozolins Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/ses.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/scsi/ses.c b/drivers/scsi/ses.c index 11826c5c2dd4..62f04c0511cf 100644 --- a/drivers/scsi/ses.c +++ b/drivers/scsi/ses.c @@ -615,13 +615,16 @@ static void ses_enclosure_data_process(struct enclosu= re_device *edev, } =20 static void ses_match_to_enclosure(struct enclosure_device *edev, - struct scsi_device *sdev) + struct scsi_device *sdev, + int refresh) { + struct scsi_device *edev_sdev =3D to_scsi_device(edev->edev.parent); struct efd efd =3D { .addr =3D 0, }; =20 - ses_enclosure_data_process(edev, to_scsi_device(edev->edev.parent), 0); + if (refresh) + ses_enclosure_data_process(edev, edev_sdev, 0); =20 if (scsi_is_sas_rphy(sdev->sdev_target->dev.parent)) efd.addr =3D sas_get_address(sdev); @@ -652,7 +655,7 @@ static int ses_intf_add(struct device *cdev, struct enclosure_device *prev =3D NULL; =20 while ((edev =3D enclosure_find(&sdev->host->shost_gendev, prev)) !=3D N= ULL) { - ses_match_to_enclosure(edev, sdev); + ses_match_to_enclosure(edev, sdev, 1); prev =3D edev; } return -ENODEV; @@ -768,7 +771,7 @@ page2_not_supported: shost_for_each_device(tmp_sdev, sdev->host) { if (tmp_sdev->lun !=3D 0 || scsi_device_enclosure(tmp_sdev)) continue; - ses_match_to_enclosure(edev, tmp_sdev); + ses_match_to_enclosure(edev, tmp_sdev, 0); } =20 return 0; --=20 2.14.1