Hello, This is the next attempt on asynchronous RAID-6 support. This patch-set has the Dan Williams' comments (Nov, 15) addressed. These were mainly about the ASYNC_TX part of the code. 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; without the patch 1 the ASYNC_TX can't be compiled for 44x in 2.6.27-rc6 or later); 2) RAID-6 implementation (patches 4-10) 3) ppc440spe ADMA driver (patch 11) (provided as a reference here) -- Yuri Tikhonov, Senior Software Engineer Emcraft Systems, www.emcraft.com -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
