From mboxrd@z Thu Jan 1 00:00:00 1970 From: MRK Subject: Re: stuck tasks Date: Mon, 12 Apr 2010 15:38:05 +0200 Message-ID: <4BC3223D.6020403@shiftmail.org> References: <4BC2FE9E.9040802@shiftmail.org> <4BC316EC.9040808@shiftmail.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-reply-to: Sender: linux-raid-owner@vger.kernel.org To: Jeremy Sanders Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On 04/12/2010 03:02 PM, Jeremy Sanders wrote: > It's not doing anything else on that drive. I think it would be faster but > the option CONFIG_MULTICORE_RAID456 was switched on in this kernel, so > there are lots of async processes fighting each other (190 of them on this > system). > Oh it's this one then. I read it has already been discussed here... you really need to remove the multicore implementation: it's experimental as of now and *much* slower than single core. I don't know why the your distro maintainer has activated it. What distro is that? Someone should probably tell the maintainers to disable it by default. I think all your problems will go away if you can recompile with multicore off.