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Fri, 6 Nov 2020 13:37:08 +0000 Date: Fri, 6 Nov 2020 09:37:07 -0400 From: Jason Gunthorpe To: liweihang CC: "dledford@redhat.com" , "leon@kernel.org" , "linux-rdma@vger.kernel.org" , Linuxarm Subject: Re: [PATCH for-next] RDMA/hns: Create QP/CQ with selected QPN/CQN for bank load balance Message-ID: <20201106133707.GV2620339@nvidia.com> References: <1599642563-10264-1-git-send-email-liweihang@huawei.com> <20200918142525.GA306144@nvidia.com> <115588ae632747f29e977f6abf0a5733@huawei.com> Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <115588ae632747f29e977f6abf0a5733@huawei.com> X-ClientProxiedBy: MN2PR04CA0007.namprd04.prod.outlook.com (2603:10b6:208:d4::20) To DM6PR12MB3834.namprd12.prod.outlook.com (2603:10b6:5:14a::12) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from mlx.ziepe.ca (156.34.48.30) by MN2PR04CA0007.namprd04.prod.outlook.com (2603:10b6:208:d4::20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3541.21 via Frontend Transport; Fri, 6 Nov 2020 13:37:08 +0000 Received: from jgg by mlx with local (Exim 4.94) (envelope-from ) id 1kb1vP-000nOy-4u; Fri, 06 Nov 2020 09:37:07 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1604669834; bh=j+0PHJwOdghkMuPgGhHB1b213OVeiJinPi6j+hiBh6I=; h=ARC-Seal:ARC-Message-Signature:ARC-Authentication-Results:Date: From:To:CC:Subject:Message-ID:References:Content-Type: Content-Disposition:In-Reply-To:X-ClientProxiedBy:MIME-Version: X-MS-Exchange-MessageSentRepresentingType; b=Tbug+NfKJiLnUZcst5OSTKK7yDQ4Vtdwoy/PerpNzn7RjSQDhPDl6W0fKAC5jQd1A JvZd23ZGNOu6p2gG2BkV3AMBveHiZjMiTi1UrWPQqOOWGoF6rgW1F5aZMd3/DJ5nCw +9OyDeO2RKUdXfV3veUIx5XaR4sck9ru0KI6G+EsBJDnLWPL8xkdtj7XbWg1N+NtKt QlsSPmYKeneEus6HfSKuW5awH4wmxMo6QIHJB2LPxTaLWCUERY4r/k0GfSnUKiWIlI CpUuBC8G/marRi/09mJsmms83f66zyE21ouxDce5ZhQpb9DgMtanb1MGBa8ktlbepf 1EN7xLn/2P3NQ== Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org On Fri, Nov 06, 2020 at 01:52:57AM +0000, liweihang wrote: > There are 8 banks and each of them has a counter which represents > how many QPs are using this bank. We first find the bank with the > smallest count, and then try to find a QPN belongs to this bank > according to the bitmap. The ida will find an unused ID starting > from 0, I think it can't meet our needs. If we use ida here, the > code may looks like: I don't understand, why wouldn't the ida give you a free QPN in a bank directly? Jason