Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757304AbXJCCoq (ORCPT ); Tue, 2 Oct 2007 22:44:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754639AbXJCCoj (ORCPT ); Tue, 2 Oct 2007 22:44:39 -0400 Received: from netops-testserver-3-out.sgi.com ([192.48.171.28]:50616 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753551AbXJCCoi (ORCPT ); Tue, 2 Oct 2007 22:44:38 -0400 From: akepner@sgi.com Date: Tue, 2 Oct 2007 19:43:38 -0700 To: Grant Grundler , Jesse Barnes , Jes Sorensen , Randy Dunlap , RolandDreier , James Bottomley , David Miller Cc: linux-kernel@vger.kernel.org Subject: [PATCH 0/5] allow drivers to flush in-flight DMA v3 Message-ID: <20071003024338.GE26752@sgi.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1051 Lines: 27 On Altix, DMA may be reordered between a device and host memory. This reordering can happen in the NUMA interconnect, and it usually results in correct operation and improved performance. In some situations it may be necessary to explicitly synchronize DMA from the device. This patchset allows a memory region to be mapped with a "dmabarrier". Writes to the memory region will cause in-flight DMA to be flushed, providing a mechanism to order DMA from a device. There are 5 patches in this patchset: [1/5] dma: add dma_flags_set_attr() to dma interface [2/5] dma: redefine dma_flags_set_attr() for sn-ia64 [3/5] dma: document dma_flags_set_attr() [4/5] infiniband: add "dmabarrier" argument to ib_umem_get() [5/5] mthca: allow setting "dmabarrier" on user-allocated memory -- Arthur - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/