From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ilya Yanok Subject: [RFC PATCH 00/11] md: support for asynchronous execution of RAID6 operations Date: Thu, 13 Nov 2008 18:15:53 +0300 Message-ID: <1226589364-5619-1-git-send-email-yanok@emcraft.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linuxppc-dev-bounces+glppd-linuxppc64-dev=m.gmane.org@ozlabs.org Errors-To: linuxppc-dev-bounces+glppd-linuxppc64-dev=m.gmane.org@ozlabs.org To: linux-raid@vger.kernel.org Cc: linuxppc-dev@ozlabs.org, dzu@denx.de, wd@denx.de List-Id: linux-raid.ids The following patch-set includes enhancements to the async_tx api and modifications to md-raid6 to issue memory copies and parity calculations asynchronously. Thus we may process copy operations and RAID-6 calculations on the dedicated DMA engines accessible with ASYNC_TX API, and, as a result off-load CPU, and improve the performance. To reduce the code duplication in the raid driver this patch-set modifies some raid-5 functions to make them possible to use in the raid-6 case. The patch-set can be broken down into thee following main categories: 1) Additions to ASYNC_TX API (patches 1-3) 2) RAID-6 implementation (patches 4-10) 3) ppc440spe ADMA driver (patch 11) (it still has a number of problems, provided only as a reference here)