Received: by 2002:ac0:a5a6:0:0:0:0:0 with SMTP id m35-v6csp2648636imm; Mon, 10 Sep 2018 04:33:51 -0700 (PDT) X-Google-Smtp-Source: ANB0VdZRA8mqfyl25BYgV6NozM/AEak4hebWpO8nKWKvrkX9c1tK+yVUXz7oBblDbexBaiPnpo/T X-Received: by 2002:a63:b914:: with SMTP id z20-v6mr22158285pge.396.1536579231837; Mon, 10 Sep 2018 04:33:51 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1536579231; cv=none; d=google.com; s=arc-20160816; b=KbvfGAJLQm3H6lKFYvfNmSpwF+ZaRum++rim9+VK1aB7MNDgM2S02aCmzOEKleqOwe euiXR0Nxam70MySKN0/2rhQszKfUKdKFletRH6jcCK3l4A9Ai5etOEMon0lMotzQSjNq n4clznA/D2niH6ez2nKu9CyZCZ2yWYInNtGopc5Iu/IKO2wDN5+XZ4Ss2hrKR+UUczGq pFmWx4qZA+pqvrsVp/DLtqWG2Z/oYut4bHj5fja1uUmNIbDx2BhcBV+D1PqeJT1/Obua 9s0cUcfTzU2+8GYILItZp4+k3o8K/JGNhIWdgdmZMI1pK9cPNXQxXP7vrfNhYbJJeb0a Q+kw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:date:cc:to:from:subject:message-id; bh=HQUpXRCG4w/ljhO2NVkWrX4q42K13m2C8qYpKzh75Xw=; b=Vg9UfxBFdYbDCF8fv3MJaPwDfarxY56z+x0aeRJcbkwnG4vj71u3QDHgTAjMQZlyjh wzE0NwO+wgvU5gnTmF5n/RmKGV8Ef2cJdCSXJAVaVf8e7GiokxIF1fxNsv0+LQY5NDxH m55CofYOHOD9xeaNizOt1Nm9nvW4+tB4om5md018i+2eUZFzmr3eymfEJYxJJ6Q7e/mQ C+0lg92BZJKJAdTXLDcE4vmCCOCQVzjj8302x1s7ah9/1nz9YLiAHVg54FseVSmr35re H5k4znstkyIgtvaux59dx8lBbsQK4LvDesoQRHZDhdMYs0R/NBkjEUXTDN95Xbz9xyzO JiVw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=collabora.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id o12-v6si16329480plg.487.2018.09.10.04.33.36; Mon, 10 Sep 2018 04:33:51 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=collabora.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728505AbeIJQZk (ORCPT + 99 others); Mon, 10 Sep 2018 12:25:40 -0400 Received: from bhuna.collabora.co.uk ([46.235.227.227]:56774 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727646AbeIJQZk (ORCPT ); Mon, 10 Sep 2018 12:25:40 -0400 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: gerddie) with ESMTPSA id B1E4F277B58 Message-ID: <1536579068.4810.68.camel@collabora.com> Subject: Re: [PATCH v7] Add udmabuf misc device From: Gert Wollny To: Gerd Hoffmann Cc: linux-kernel@vger.kernel.org, David Airlie , Tomeu Vizoso , Laurent Pinchart , Daniel Vetter Date: Mon, 10 Sep 2018 13:31:08 +0200 In-Reply-To: <20180910105309.zmyoo5yhrmqg47md@sirius.home.kraxel.org> References: <1536491489.4810.22.camel@collabora.com> <20180910083731.o4rryvermyighbtp@sirius.home.kraxel.org> <1536571118.4810.38.camel@collabora.com> <20180910105309.zmyoo5yhrmqg47md@sirius.home.kraxel.org> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.24.6 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Am Montag, den 10.09.2018, 12:53 +0200 schrieb Gerd Hoffmann: > > By default qemu doesn't use memfd for backing storage, you have to > explicitly configure qemu that way (see qemu commit log of the test > branch): > > qemu-system-x86_64 -m 2G > -object memory-backend-memfd,id=ram,size=2G > -numa node,memdev=ram" Thanks, but that doesn't seem to help. Are there any host kernel configuration parameters or features that I should set (apart from enabling udmabuf)? Best, Gert