From mboxrd@z Thu Jan 1 00:00:00 1970 From: MRK Subject: Re: stuck tasks Date: Mon, 12 Apr 2010 13:06:06 +0200 Message-ID: <4BC2FE9E.9040802@shiftmail.org> References: 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 12:40 PM, Jeremy Sanders wrote: > Hi - I'm not getting any joy with Fedora's bugzilla. Has anyone seen > problems like this with Fedora 12? Our systems have recently been getting > stuck while rsyncing data onto an MD device: > > https://bugzilla.redhat.com/show_bug.cgi?id=578549 > > You need to lower the sync speed by catting a value into /sys/block/md{n}/md/sync_speed_max the value should be about 1/3 lower than the max speed you see (cat /proc/mdstat) now that it's not yet limited. Set up a script to set it at boot. If it was not happening for you on older kernels might be a good sign: it might mean that the resync is faster now... What is the sync speed you see (cat /proc/mdstat)? How many drives do you have and what type of raid is that?