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[2603:7000:9602:8233:6d4:c4ff:fe48:9d05]) by smtp.gmail.com with ESMTPSA id g6sm1590177qtg.91.2021.03.03.07.44.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Mar 2021 07:44:29 -0800 (PST) Sender: Tejun Heo Date: Wed, 3 Mar 2021 10:44:28 -0500 From: Tejun Heo To: Jacob Pan Cc: LKML , Joerg Roedel , Lu Baolu , David Woodhouse , iommu@lists.linux-foundation.org, cgroups@vger.kernel.org, Li Zefan , Johannes Weiner , Jean-Philippe Brucker , Alex Williamson , Eric Auger , Jason Gunthorpe , Jonathan Corbet , Raj Ashok , "Tian, Kevin" , Yi Liu , Wu Hao , Dave Jiang Subject: Re: [RFC PATCH 15/18] cgroup: Introduce ioasids controller Message-ID: References: <1614463286-97618-1-git-send-email-jacob.jun.pan@linux.intel.com> <1614463286-97618-16-git-send-email-jacob.jun.pan@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1614463286-97618-16-git-send-email-jacob.jun.pan@linux.intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Feb 27, 2021 at 02:01:23PM -0800, Jacob Pan wrote: > IOASIDs are used to associate DMA requests with virtual address spaces. > They are a system-wide limited resource made available to the userspace > applications. Let it be VMs or user-space device drivers. > > This RFC patch introduces a cgroup controller to address the following > problems: > 1. Some user applications exhaust all the available IOASIDs thus > depriving others of the same host. > 2. System admins need to provision VMs based on their needs for IOASIDs, > e.g. the number of VMs with assigned devices that perform DMA requests > with PASID. Please take a look at the proposed misc controller: http://lkml.kernel.org/r/20210302081705.1990283-2-vipinsh@google.com Would that fit your bill? Thanks. -- tejun 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=-3.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 EE760C433E0 for ; Wed, 3 Mar 2021 21:34:21 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5B1FA64EF6 for ; Wed, 3 Mar 2021 21:34:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5B1FA64EF6 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 15E326F9C5; Wed, 3 Mar 2021 21:34:21 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id tHypDGbqxp20; Wed, 3 Mar 2021 21:34:20 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp3.osuosl.org (Postfix) with ESMTP id 1FD5A6F994; Wed, 3 Mar 2021 21:34:20 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id EC39CC000A; Wed, 3 Mar 2021 21:34:19 +0000 (UTC) Received: from smtp1.osuosl.org (smtp1.osuosl.org [IPv6:2605:bc80:3010::138]) by lists.linuxfoundation.org (Postfix) with ESMTP id 2447DC0001 for ; Wed, 3 Mar 2021 21:34:18 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id 12AA782FA9 for ; Wed, 3 Mar 2021 21:34:18 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Authentication-Results: smtp1.osuosl.org (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from smtp1.osuosl.org ([127.0.0.1]) by localhost (smtp1.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id sPog70E02TB5 for ; Wed, 3 Mar 2021 21:34:14 +0000 (UTC) X-Greylist: delayed 05:49:43 by SQLgrey-1.8.0 Received: from mail-qv1-xf2c.google.com (mail-qv1-xf2c.google.com [IPv6:2607:f8b0:4864:20::f2c]) by smtp1.osuosl.org (Postfix) with ESMTPS id 0AE1283131 for ; Wed, 3 Mar 2021 21:34:13 +0000 (UTC) Received: by mail-qv1-xf2c.google.com with SMTP id d9so6273088qvo.3 for ; Wed, 03 Mar 2021 13:34:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=yAenZ2k324Y74inyHnLSpf4GKMijWe+eb5zJ0f7us3Y=; b=Yo/WbLtNEcukoBaVIbtOmoJkqQ78eohGvlv9L6yTWcdDIuU+1DKAsD3fh1HE47Xrp+ QFlB7j0powGVx/NAToiiojNwZYwizMSL3bMhnmCO5LXvVsufMjP7GNnPm8L/4Z04DNED PwkvridEsCPsRoNu/6CyDKV6GbFO6q2fPyLhHKJnUfbBGoKhaEDc7kAAkZXc5ASnjGnj COSukL6HNRaAnW+dWsCVUTEWV6O1Sj57SBKzdk7nqI1XHIiwgqRSH+n321SqE/5pCgGy ZRtUeRAi9hqP8qbDLI7pXQc3l3kAvlrBrJ0G4HVsFGa3WxRqSwAhAuIuaJFI+TFc8FpN EZ4A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to; bh=yAenZ2k324Y74inyHnLSpf4GKMijWe+eb5zJ0f7us3Y=; b=CLTJBm2Eq8KMKxS6b46ifIniyODl1329B0xtWjh4h3kWvKgDzGr20beBw1pxxfgJfY 6+f3lssoPUT0ono8VMs1lGv5NjQAs2XOMO/DNPVgLNoiUGsrgOLaUMAsNAhR+6eppEeP 6vRa+1FR0xG7vMlwgk/enkgMDk3xioOcnIbCLmvN3ByKR6WIRU+13BqwjH3EI8ow84Ty PHE6heabwe7DC+nz3s8pfk3QOyFn4VEfqR4W0prEk3WHdMMOWLt4X0/8gBYU8x8GGp7q b9DDEUo2Qhwv1RNJCYx2gWZzCWsQzxzmJKborp+MnYTykGWzeZE7H+1P39zGOCY3tewn tRDQ== X-Gm-Message-State: AOAM532kw/Av6g9TfW6rpMMmjjoGzrEpKeUOvrHLdMu+Qu8mJ/S2wKju zG7RazAl2nDleGwHGxB/dXcbbxIkgp3iEA== X-Google-Smtp-Source: ABdhPJzfFnuZzOw9IZBrOfo12BzAhQPTqGWB0InFeznSDVw2hz00sFHfeQE8i+h+temYeCDQwJeU0A== X-Received: by 2002:ad4:4581:: with SMTP id x1mr3253236qvu.9.1614786270710; Wed, 03 Mar 2021 07:44:30 -0800 (PST) Received: from localhost (2603-7000-9602-8233-06d4-c4ff-fe48-9d05.res6.spectrum.com. [2603:7000:9602:8233:6d4:c4ff:fe48:9d05]) by smtp.gmail.com with ESMTPSA id g6sm1590177qtg.91.2021.03.03.07.44.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Mar 2021 07:44:29 -0800 (PST) Date: Wed, 3 Mar 2021 10:44:28 -0500 From: Tejun Heo To: Jacob Pan Subject: Re: [RFC PATCH 15/18] cgroup: Introduce ioasids controller Message-ID: References: <1614463286-97618-1-git-send-email-jacob.jun.pan@linux.intel.com> <1614463286-97618-16-git-send-email-jacob.jun.pan@linux.intel.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1614463286-97618-16-git-send-email-jacob.jun.pan@linux.intel.com> Cc: "Tian, Kevin" , Alex Williamson , Raj Ashok , Jonathan Corbet , Jean-Philippe Brucker , LKML , Dave Jiang , iommu@lists.linux-foundation.org, Li Zefan , Jason Gunthorpe , Johannes Weiner , cgroups@vger.kernel.org, Wu Hao , David Woodhouse X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On Sat, Feb 27, 2021 at 02:01:23PM -0800, Jacob Pan wrote: > IOASIDs are used to associate DMA requests with virtual address spaces. > They are a system-wide limited resource made available to the userspace > applications. Let it be VMs or user-space device drivers. > > This RFC patch introduces a cgroup controller to address the following > problems: > 1. Some user applications exhaust all the available IOASIDs thus > depriving others of the same host. > 2. System admins need to provision VMs based on their needs for IOASIDs, > e.g. the number of VMs with assigned devices that perform DMA requests > with PASID. Please take a look at the proposed misc controller: http://lkml.kernel.org/r/20210302081705.1990283-2-vipinsh@google.com Would that fit your bill? Thanks. -- tejun _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu