From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stan Hoeppner Subject: Re: raid5 raid5d multi-thread Date: Fri, 01 Nov 2013 11:19:50 -0500 Message-ID: <5273D4A6.3070308@hardwarefreak.com> References: <72a920d2-2c76-41af-bcac-0dee5b36df5a@aliyun.com> Reply-To: stan@hardwarefreak.com Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <72a920d2-2c76-41af-bcac-0dee5b36df5a@aliyun.com> Sender: linux-raid-owner@vger.kernel.org To: lilofile , linux-raid@vger.kernel.org List-Id: linux-raid.ids On 10/31/2013 10:27 PM, lilofile wrote: > now in MD raid5,stripe is hande in one thread, and I found the CPU occupation is very high, why stripe is not handled in multi-thread ? is any different to implement? and what consideration in original design? Shaohua Li has been working on a threaded RAID5 implementation for many months now. AFAIK it is not yet ready for inclusion nor widespread testing by others. See: https://lkml.org/lkml/2013/7/30/29 -- Stan