From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754077AbbJNOrz (ORCPT ); Wed, 14 Oct 2015 10:47:55 -0400 Received: from mga09.intel.com ([134.134.136.24]:35701 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753492AbbJNOry (ORCPT ); Wed, 14 Oct 2015 10:47:54 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,681,1437462000"; d="scan'208";a="826534672" Date: Wed, 14 Oct 2015 20:21:00 +0530 From: Vinod Koul To: Rameshwar Prasad Sahu Cc: dan.j.williams@intel.com, dmaengine@vger.kernel.org, arnd@arndb.de, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, jcm@redhat.com, patches@apm.com Subject: Re: [PATCH] dmaengine: xgene-dma: Remove memcpy offload support due to performance drop Message-ID: <20151014145100.GX27370@localhost> References: <1444830907-8035-1-git-send-email-rsahu@apm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1444830907-8035-1-git-send-email-rsahu@apm.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Oct 14, 2015 at 07:25:07PM +0530, Rameshwar Prasad Sahu wrote: > The DMA engine supports memory copy, RAID5 XOR, RAID6 PQ, and other > computations. But the bandwidth of the entire DMA engine is shared > among all channels. This patch re-configures operations availability > such that one can achieve maximum performance for XOR and PQ > computation by removing the memory offload operations. Applied, thanks -- ~Vinod