From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from list by lists.gnu.org with archive (Exim 4.90_1) id 1lbBUK-0004Ft-1P for mharc-qemu-trivial@gnu.org; Mon, 26 Apr 2021 20:22:05 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:60818) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lb7Uj-0007QC-IW; Mon, 26 Apr 2021 16:06:13 -0400 Received: from mail-wr1-x434.google.com ([2a00:1450:4864:20::434]:37569) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lb7Uf-0001Ng-Np; Mon, 26 Apr 2021 16:06:13 -0400 Received: by mail-wr1-x434.google.com with SMTP id j5so56203284wrn.4; Mon, 26 Apr 2021 13:06:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=PuhuR3UqIjFb4yXds2SdFCLnbq4LjC/3ZCGuCZSVLxE=; b=UlTnEb/0o3ipOyCz1v/eOvrtnfrkpJVqOEwqIu+lQmSqBF6GF7th0g/Gi9k4RL2R6W uZJSRsIJ+Dqm+0rEBzkJjrlA2w9AMd0+5F+gENxtzJGAeEd8OGIwEovgjsFSbOMEfSD8 MqwbIVYbnmNrq7o20gnupqlV3yhLICPpEjv9iq4ZF61RVZY+SnN25WRTLKObeRbgiMk9 zCBoTCfol2DHEDMpaJC56DcNBP2TTy173Pd21vLStkN/Oyy6y2+KSP01GNkVlcpW/KSj YGVgMM/+LqaL1NTRdC3IhuOeQMvmwGh7EfiuGsPmjV6+xJBYR89v5ZmU+3Gt8E7G4heM Efng== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=PuhuR3UqIjFb4yXds2SdFCLnbq4LjC/3ZCGuCZSVLxE=; b=GMvQdNh/sysMscEvVo342Eqw4FLqiqh8mRHS76MWSQfwivcYzI+JBS1xDFVu+VG2Rd FXefsGr19Y/lYY6+5wco/tpUkwRBRZ7xr+1zB8QuLF1sLORpTm8w1DYY1gPD25cKbKSM QWv1m5Ux3W6M4f91IZMokCsTFC78qUuLBSzxd022Ob6D8BpnCpUPz3YsnGBPu4GpQ8c+ 3gSxU89Ksv75cOrONWyt9qixsk/veRDF3UIeBa4Wq/JFrNNftAoae9WHk/bCQwo1OJ/r ksw/04Xhw2u1X8eKF6PvAUs/9unrAYXjh+LfARtu1sBluURcQ7MwUp8/LUz6fZw0++2F c5tg== X-Gm-Message-State: AOAM5323ihheBATCL7BPgsPJ7X9oXPJnMO9LfpAAAC8a+HN5rebW23vD hiQHzi8TmjAyb1RpOTTCRzNmG0Ab6w6KJA== X-Google-Smtp-Source: ABdhPJznmNXCiQJK9g8sX3XvFURb8phM4qCOFJ8LX5nHAzxPFnl0MrgOHYtfkFaSy3B4kokZWaamiw== X-Received: by 2002:adf:f506:: with SMTP id q6mr25231359wro.65.1619467563425; Mon, 26 Apr 2021 13:06:03 -0700 (PDT) Received: from ubuntu.localdomain (host-92-0-155-74.as13285.net. [92.0.155.74]) by smtp.gmail.com with ESMTPSA id y11sm1396792wro.37.2021.04.26.13.06.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Apr 2021 13:06:02 -0700 (PDT) From: Dev Audsin To: qemu-devel@nongnu.org Cc: alex.williamson@redhat.com, qemu-trivial@nongnu.org, dgilber@redhat.com, dev.devaqemu@gmail.com Subject: Date: Mon, 26 Apr 2021 13:05:52 -0700 Message-Id: <20210426200553.145976-1-dev.devaqemu@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::434; envelope-from=dev.devaqemu@gmail.com; helo=mail-wr1-x434.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Mon, 26 Apr 2021 20:21:58 -0400 X-BeenThere: qemu-trivial@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 Apr 2021 20:06:14 -0000 virtio-fs with DAX is currently not compatible with NIC Pass through. When a SR-IOV VF attaches to a qemu process, vfio will try to pin the entire DAX Window but it is empty when the guest boots and will fail. A method to make VFIO and DAX to work together is to make vfio skip DAX cache. Currently DAX cache need to be set to 0, for the SR-IOV VF to be attached to Kata containers. Enabling both SR-IOV VF and DAX work together will potentially improve performance for workloads which are I/O and network intensive 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=-3.5 required=3.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT 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 CF82EC433ED for ; Tue, 27 Apr 2021 00:25:25 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 2C65C613AA for ; Tue, 27 Apr 2021 00:25:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2C65C613AA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:40082 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lbBXX-00071R-4O for qemu-devel@archiver.kernel.org; Mon, 26 Apr 2021 20:25:23 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:60818) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lb7Uj-0007QC-IW; Mon, 26 Apr 2021 16:06:13 -0400 Received: from mail-wr1-x434.google.com ([2a00:1450:4864:20::434]:37569) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lb7Uf-0001Ng-Np; Mon, 26 Apr 2021 16:06:13 -0400 Received: by mail-wr1-x434.google.com with SMTP id j5so56203284wrn.4; Mon, 26 Apr 2021 13:06:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=PuhuR3UqIjFb4yXds2SdFCLnbq4LjC/3ZCGuCZSVLxE=; b=UlTnEb/0o3ipOyCz1v/eOvrtnfrkpJVqOEwqIu+lQmSqBF6GF7th0g/Gi9k4RL2R6W uZJSRsIJ+Dqm+0rEBzkJjrlA2w9AMd0+5F+gENxtzJGAeEd8OGIwEovgjsFSbOMEfSD8 MqwbIVYbnmNrq7o20gnupqlV3yhLICPpEjv9iq4ZF61RVZY+SnN25WRTLKObeRbgiMk9 zCBoTCfol2DHEDMpaJC56DcNBP2TTy173Pd21vLStkN/Oyy6y2+KSP01GNkVlcpW/KSj YGVgMM/+LqaL1NTRdC3IhuOeQMvmwGh7EfiuGsPmjV6+xJBYR89v5ZmU+3Gt8E7G4heM Efng== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=PuhuR3UqIjFb4yXds2SdFCLnbq4LjC/3ZCGuCZSVLxE=; b=GMvQdNh/sysMscEvVo342Eqw4FLqiqh8mRHS76MWSQfwivcYzI+JBS1xDFVu+VG2Rd FXefsGr19Y/lYY6+5wco/tpUkwRBRZ7xr+1zB8QuLF1sLORpTm8w1DYY1gPD25cKbKSM QWv1m5Ux3W6M4f91IZMokCsTFC78qUuLBSzxd022Ob6D8BpnCpUPz3YsnGBPu4GpQ8c+ 3gSxU89Ksv75cOrONWyt9qixsk/veRDF3UIeBa4Wq/JFrNNftAoae9WHk/bCQwo1OJ/r ksw/04Xhw2u1X8eKF6PvAUs/9unrAYXjh+LfARtu1sBluURcQ7MwUp8/LUz6fZw0++2F c5tg== X-Gm-Message-State: AOAM5323ihheBATCL7BPgsPJ7X9oXPJnMO9LfpAAAC8a+HN5rebW23vD hiQHzi8TmjAyb1RpOTTCRzNmG0Ab6w6KJA== X-Google-Smtp-Source: ABdhPJznmNXCiQJK9g8sX3XvFURb8phM4qCOFJ8LX5nHAzxPFnl0MrgOHYtfkFaSy3B4kokZWaamiw== X-Received: by 2002:adf:f506:: with SMTP id q6mr25231359wro.65.1619467563425; Mon, 26 Apr 2021 13:06:03 -0700 (PDT) Received: from ubuntu.localdomain (host-92-0-155-74.as13285.net. [92.0.155.74]) by smtp.gmail.com with ESMTPSA id y11sm1396792wro.37.2021.04.26.13.06.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Apr 2021 13:06:02 -0700 (PDT) From: Dev Audsin To: qemu-devel@nongnu.org Subject: Date: Mon, 26 Apr 2021 13:05:52 -0700 Message-Id: <20210426200553.145976-1-dev.devaqemu@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::434; envelope-from=dev.devaqemu@gmail.com; helo=mail-wr1-x434.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Mon, 26 Apr 2021 20:21:43 -0400 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-trivial@nongnu.org, alex.williamson@redhat.com, dgilber@redhat.com, dev.devaqemu@gmail.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" virtio-fs with DAX is currently not compatible with NIC Pass through. When a SR-IOV VF attaches to a qemu process, vfio will try to pin the entire DAX Window but it is empty when the guest boots and will fail. A method to make VFIO and DAX to work together is to make vfio skip DAX cache. Currently DAX cache need to be set to 0, for the SR-IOV VF to be attached to Kata containers. Enabling both SR-IOV VF and DAX work together will potentially improve performance for workloads which are I/O and network intensive