From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.4 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E5521C33CAA for ; Thu, 23 Jan 2020 22:55:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A68B420718 for ; Thu, 23 Jan 2020 22:55:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=ziepe.ca header.i=@ziepe.ca header.b="BURrV0y5" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729433AbgAWWz5 (ORCPT ); Thu, 23 Jan 2020 17:55:57 -0500 Received: from mail-pg1-f194.google.com ([209.85.215.194]:46489 "EHLO mail-pg1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729413AbgAWWz5 (ORCPT ); Thu, 23 Jan 2020 17:55:57 -0500 Received: by mail-pg1-f194.google.com with SMTP id z124so2122838pgb.13 for ; Thu, 23 Jan 2020 14:55:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ziepe.ca; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=M7+mwRKYvUclKLwFqX/3sXfC8Je3bfz17EKmfII2yd4=; b=BURrV0y5pnWJIIjhBnFJpdId5kmuYEmnbFAQ2DWYb6Sq6ZB8IyZy1zHm6wlOCgvwOs B6KMiIEajHIfx4bVJgOVUxJEivBd23gGhGg04SzD9QwxumF1IAfRaGUAw5H0F5qK5HWS w+c9mbqoATI1lzKmqlpBLU2xNN1+KY+NG3Laf5YAr2Wie0xAEcF2Mb4Uc0PqftxS9idM Y9HUNpSFoAyOXb3h0oDhtGgWzXh8zCwtRvKBMPU4k7UdhNvcf48amH/gGy2EwPzW/XU9 V9UjESwPvaLZ0IQGRJdgkj9gSRiZLcC0FhGKB73hXn7CkMkMbNhQR+JaJkF4/V9q3PP5 8e0g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=M7+mwRKYvUclKLwFqX/3sXfC8Je3bfz17EKmfII2yd4=; b=jR/yZOGAiA7gkPmL20jwnSwUD4OU7oyLDlvxRvW8X/Z+rgePfT/oKw1/W2gzpS2uUs 7P/GrJb87UZ04Lkyb0qGE0eBxll/7yUKmZHT/djsK1fIcdRQPmWRHzhFkUy7i7xHN9KY s3VHRJ+Zc7hl3lXTsVI6bdEZsxBlch9lioBG6M8f/a5Lu/rA3Q2k6039gugVT90CFtqb 7KWDIpre6mp1RCXsdb6gFfPgBlac3XZ5RwLhctBfH5Ldr+9HiOBJmEVW/rdLZ8m2LQSw Pn5ooaAS66QLseWk1JEAEOVknZazyQEdM7mguY7axx4qc318ha/WYuAYSkq0EtGC6gEE 0orQ== X-Gm-Message-State: APjAAAXLejWSHs9OVMYk15JsFKa6f/XXgRAdCx0muzANsQ0R9cDAq3oy 0GlzQ3sz2lu91PwKshF3RrqHag== X-Google-Smtp-Source: APXvYqzwOnjPxOUBUbeXj4mQ/28esCmvyW5jnJ/Er6AzPPnLzeyDXmUNp4StrAgVRGjskJwOoxPU0w== X-Received: by 2002:a65:52ca:: with SMTP id z10mr741292pgp.47.1579820156317; Thu, 23 Jan 2020 14:55:56 -0800 (PST) Received: from ziepe.ca ([199.201.64.131]) by smtp.gmail.com with ESMTPSA id g9sm3883722pfm.150.2020.01.23.14.55.55 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 23 Jan 2020 14:55:55 -0800 (PST) Received: from jgg by jggl.ziepe.ca with local (Exim 4.90_1) (envelope-from ) id 1iulOF-0003zJ-33; Thu, 23 Jan 2020 18:55:55 -0400 Date: Thu, 23 Jan 2020 18:55:55 -0400 From: Jason Gunthorpe To: Leon Romanovsky Cc: Weihang Li , dledford@redhat.com, linux-rdma@vger.kernel.org, linuxarm@huawei.com Subject: Re: [PATCH for-next 4/7] RDMA/hns: Optimize qp buffer allocation flow Message-ID: <20200123225555.GB15167@ziepe.ca> References: <1579508377-55818-1-git-send-email-liweihang@huawei.com> <1579508377-55818-5-git-send-email-liweihang@huawei.com> <20200123143136.GO7018@unreal> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200123143136.GO7018@unreal> User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org On Thu, Jan 23, 2020 at 04:31:36PM +0200, Leon Romanovsky wrote: > > + ret = map_qp_buf(hr_dev, hr_qp, page_shift, udata); > > I don't remember what was the resolution if it is ok to rely on "udata" > as an indicator of user/kernel flow. udata is to be used to check for kernel/user Jason