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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id B6DEDD767F1 for ; Thu, 31 Oct 2024 17:42:14 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 498F56B007B; Thu, 31 Oct 2024 13:42:14 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 449426B0082; Thu, 31 Oct 2024 13:42:14 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 310896B0083; Thu, 31 Oct 2024 13:42:14 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id 12E496B007B for ; Thu, 31 Oct 2024 13:42:14 -0400 (EDT) Received: from smtpin30.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay10.hostedemail.com (Postfix) with ESMTP id B5C2BC1821 for ; Thu, 31 Oct 2024 17:42:13 +0000 (UTC) X-FDA: 82734615348.30.DD89A21 Received: from mail-io1-f50.google.com (mail-io1-f50.google.com [209.85.166.50]) by imf19.hostedemail.com (Postfix) with ESMTP id 915A41A000F for ; Thu, 31 Oct 2024 17:41:37 +0000 (UTC) Authentication-Results: imf19.hostedemail.com; dkim=pass header.d=kernel-dk.20230601.gappssmtp.com header.s=20230601 header.b=OEjQTfyq; spf=pass (imf19.hostedemail.com: domain of axboe@kernel.dk designates 209.85.166.50 as permitted sender) smtp.mailfrom=axboe@kernel.dk; dmarc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1730396450; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=x40+SjEaq5943TtiP/UXom9Wy7SciOs8xRpZ9sdjGNw=; b=hQ8ZSzJye56wk1L9H+0S6ntiOazxWx6iYfnE+er4tizB67LyaU6Vfc6+ZXSf1wqcMrRpPL 6u0P6QEZZX+n0gjYMbUJY66lYiNhTmbSRSqKDBo7ZDXIUa7JDzWcixSnZd4IY3D0pU+2gv QaWQ5PfgrA3jJL8f80iPH6A5FNSfcYg= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1730396450; a=rsa-sha256; cv=none; b=VpW0+vDNRpZLVawmRNMLDvDGlYWBM74Dhi9DcIP/GGQchctzYi7U/xI07VJq/K/FfH5FqO TwqoIwztppwlheZgL//upHzudln/TbmF7lMnWAvqtbmDPS6HJkLg0nJChDihqZduaygK9O kqK5/ZodTuBWNGY+sw4CZ3nBtlE7rFw= ARC-Authentication-Results: i=1; imf19.hostedemail.com; dkim=pass header.d=kernel-dk.20230601.gappssmtp.com header.s=20230601 header.b=OEjQTfyq; spf=pass (imf19.hostedemail.com: domain of axboe@kernel.dk designates 209.85.166.50 as permitted sender) smtp.mailfrom=axboe@kernel.dk; dmarc=none Received: by mail-io1-f50.google.com with SMTP id ca18e2360f4ac-83abe7fc77eso46615139f.0 for ; Thu, 31 Oct 2024 10:42:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20230601.gappssmtp.com; s=20230601; t=1730396530; x=1731001330; darn=kvack.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=x40+SjEaq5943TtiP/UXom9Wy7SciOs8xRpZ9sdjGNw=; b=OEjQTfyq1AHmNvh7zCL465A0IVmwB7tMXQ0IHICvmPNzaRyw6V/3xm+jWfbkuBjy+E Wj2lCy8tYXHzYUP3JTkVB/3eKbTl6MjG/rgzUnJlNtXDI6bspiBTJAbhSAabNNT1fmZw TC3B2DeSj92ySJcm5UKibKWNS+q0Kjha7MFq+cf2B75Q/+xOpq1d4qFtKwm8+tM4K1vu rMd1JrX4GeUU3DgoIZPhG1ecigaSEFSl1pI79GwmmQymlA+fOqQRJGH+Vrpk8rgwpOou SVeTJEtf1XlsnwtDf8topgaQCXnvmMBXjJA+zKh90/+/PX6OuHCei5/tKwHvmUrI1fKp +oEQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730396530; x=1731001330; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=x40+SjEaq5943TtiP/UXom9Wy7SciOs8xRpZ9sdjGNw=; b=mdA/JE5SzS/8duXbdd4r/a6KW36Fs7pmJxSytlp9AEZryKfgxTl7zBi4Aiz2N+j+dc qyQ065Ts+zcdwd3FzaNmiUVcWeQfghIALA4rFEfVeioB3EN2aST1SMZpIZhIi9RWlmrM Jy+HLMaV56zUelcWeFzGXMfxSjArTQMnoSNQKoUdLXM5rKKkLTqviW6IaWmt8acdQp37 4xHuUNNqE6Fnl56VdlsDR9XwZbsqN0ar1f1i1H3E6ENz4BM4vBBDxBli+pY/wzWFmrpF s2CCzgQhd/xQVuL2fnysWOisCT7onYhGbUf44xNBtDCQl5FvvDPtX2bV1Rtj32yY0Wk5 OfiA== X-Forwarded-Encrypted: i=1; AJvYcCXSF6TgV9U90b8hYVFepcmOdDzoUA0HcL3GkWoUO2U6C2s98vm7ET7Tia6ORMTco8cI4cSa+p3mAA==@kvack.org X-Gm-Message-State: AOJu0Ywq3E9ZVpmz4JcOgBM+ranpYkAMGgFxXoONG4p0I/fJHsPqOM0k fljfQbHTBD/lWob8myZr5rw+TXYohywLzdG5gjPz+m+1lmMMyShfFTnfvSDuQBc= X-Google-Smtp-Source: AGHT+IG0ksmejkYn/tsWOFj5UDq65mB5fTjw0uagwhlJwyCNesDEnrmSpfLQj8+GbqVblFhVpBgdOw== X-Received: by 2002:a05:6602:15d4:b0:83a:c242:82aa with SMTP id ca18e2360f4ac-83b1c5cd123mr2127656539f.13.1730396530549; Thu, 31 Oct 2024 10:42:10 -0700 (PDT) Received: from [192.168.1.116] ([96.43.243.2]) by smtp.gmail.com with ESMTPSA id ca18e2360f4ac-83b67b4b157sm40604339f.22.2024.10.31.10.42.08 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 31 Oct 2024 10:42:09 -0700 (PDT) Message-ID: <2a0fc88a-53af-4d7e-b8fd-8cee3f0804a1@kernel.dk> Date: Thu, 31 Oct 2024 11:42:07 -0600 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1 00/17] Provide a new two step DMA mapping API To: Christoph Hellwig Cc: Leon Romanovsky , Jason Gunthorpe , Robin Murphy , Joerg Roedel , Will Deacon , Sagi Grimberg , Keith Busch , Bjorn Helgaas , Logan Gunthorpe , Yishai Hadas , Shameer Kolothum , Kevin Tian , Alex Williamson , Marek Szyprowski , =?UTF-8?B?SsOpcsO0bWUgR2xpc3Nl?= , Andrew Morton , Jonathan Corbet , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-rdma@vger.kernel.org, iommu@lists.linux.dev, linux-nvme@lists.infradead.org, linux-pci@vger.kernel.org, kvm@vger.kernel.org, linux-mm@kvack.org References: <3144b6e7-5c80-46d2-8ddc-a71af3c23072@kernel.dk> <20241031083450.GA30625@lst.de> Content-Language: en-US From: Jens Axboe In-Reply-To: <20241031083450.GA30625@lst.de> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam10 X-Stat-Signature: xbm9cme4t1qqthmpdg76wzf6yh1xbrjh X-Rspamd-Queue-Id: 915A41A000F X-Rspam-User: X-HE-Tag: 1730396497-514752 X-HE-Meta: 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 e/ryGGP6 iGtulVWlM9+dKDgbWUdJP4Kisdsl4R2FbghJJ6aSLv5o9e4drU+V88X2h2wfbZ8vCSWHEzIs/TVMX5mog7Bhj02v3VjsWmA5lhU56Sp74dLBh1fIx56jG6BRG0GFfURbEjhCS68u4qs0GD+CQCRcmQF7Yx/b3fYAUyXaIveRxYKFFBU6zyww7FvegvTOIE1gXgLIvSWRu8+6b3NsRuxySw534afAU2Gyh0CjQMZdmFJ7djDIA6o9/LjYeJTLF+iQ3vcZWyHpWbhG+OYHV3kt8v3ciBDyOyOwamjVsTfI+MdHQE0v6iypAJFpD6TWuYPpqnoWA8vzpETRX76/Jz2j+tiawdAKqporhpQ+8 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 10/31/24 2:34 AM, Christoph Hellwig wrote: > On Wed, Oct 30, 2024 at 07:44:13PM -0600, Jens Axboe wrote: >> On Christoph's request, I tested this series last week and saw some >> pretty significant performance regressions on my box. I don't know what >> the status is in terms of that, just want to make sure something like >> this doesn't get merged until that is both fully understood and sorted >> out. > > Working on it, but I have way too many things going on at once. Note > that the weird thing about your setup was that we apparently dropped into > the slow path, which still puzzles me. But I should probably also look > into making that path a little less slow. That's fine, just wanted to ensure that no push was being done on this before that was resolved. -- Jens Axboe