From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail143.messagelabs.com (mail143.messagelabs.com [216.82.254.35]) by kanga.kvack.org (Postfix) with ESMTP id CF5F46B02A3 for ; Tue, 20 Jul 2010 21:45:36 -0400 (EDT) Date: Wed, 21 Jul 2010 10:44:37 +0900 Subject: Re: [RFC 1/3 v3] mm: iommu: An API to unify IOMMU, CPU and device memory management From: FUJITA Tomonori In-Reply-To: <20100720221959.GC12250@codeaurora.org> References: <20100715014148.GC2239@codeaurora.org> <20100719082213.GA7421@n2100.arm.linux.org.uk> <20100720221959.GC12250@codeaurora.org> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-Id: <20100721104356S.fujita.tomonori@lab.ntt.co.jp> Sender: owner-linux-mm@kvack.org To: zpfeffer@codeaurora.org Cc: linux@arm.linux.org.uk, fujita.tomonori@lab.ntt.co.jp, ebiederm@xmission.com, linux-arch@vger.kernel.org, dwalker@codeaurora.org, mel@csn.ul.ie, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, andi@firstfloor.org, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org List-ID: On Tue, 20 Jul 2010 15:20:01 -0700 Zach Pfeffer wrote: > > I'm not saying that it's reasonable to pass (or even allocate) a 1MB > > buffer via the DMA API. > > But given a bunch of large chunks of memory, is there any API that can > manage them (asked this on the other thread as well)? What is the problem about mapping a 1MB buffer with the DMA API? Possibly, an IOMMU can't find space for 1MB but it's not the problem of the DMA API. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org