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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 987EFC43334 for ; Mon, 11 Jul 2022 15:02:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Xf/JbTW5HhhYLWE9WAiV3flZws5f5VGdbz8I4SlYtjo=; b=KFQLoiS/qYpAvm 017Cn/XzrQ0FbqFp7BpO3/jGoTTha3FbQCH4Xr7XFip9hekJL6EtSYXLjSx1qhw5FSbzmqswOLCFB TcbUH50brDYLtbMoeBsZP3+j2f+ae3VRUYJ4zh9JSiwhOcY+asLrRzuOul4VtgKOEYzOmHLksz8ai Q4sNJb8sxP8teASaZ5aHspn6IYgLDpeT8SrfPQ1iOrUYgs788W+JAchdDP6M2/GLKmY80xvmAezHb sGSFdLkWzlQ+PoRuJrHiyynPS7g0kGqubTFD7Bvq80Mp5L3leZixamnbR2/h5jnkP9HIH1YlUKn8N wu/vpIf84Fn8jO2RZP2w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oAuur-002hJH-7r; Mon, 11 Jul 2022 15:01:41 +0000 Received: from hch by bombadil.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1oAuui-002hCr-9j; Mon, 11 Jul 2022 15:01:32 +0000 Date: Mon, 11 Jul 2022 08:01:32 -0700 From: Christoph Hellwig To: Li Chen Cc: Catalin Marinas , Will Deacon , Rob Herring , Frank Rowand , Andrew Morton , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH 0/4] add struct page and Direct I/O support to reserved memory Message-ID: References: <20220711122459.13773-1-me@linux.beauty> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20220711122459.13773-1-me@linux.beauty> X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Who is going to use it and how? Because normally the reserved memory is used through the DMA allocator, and you can't just do direct I/O to that. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel