From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?ISO-8859-1?Q?T=F5nis_Bramanis?= Subject: Re: Limit I/O for individual disks of VM Date: Wed, 28 Sep 2011 10:48:09 +0300 Message-ID: <4E82D139.2060100@elkdata.ee> References: <4E818A50.3050607@elkdata.ee> <4E822AE3.6050601@goop.org> <4E82BDC0.7040604@elkdata.ee> <4E82C017.1050803@goop.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Joseph Glanville Cc: Jeremy Fitzhardinge , xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org If i run the exact same kernel without Xen and test the i/o, it won't crash. I just tried to look up an old post to refer it to You and seems it has been updated just yesterday with a fix: http://xen.1045712.n5.nabble.com/Xen-4-1-3ware-9690SA-rejecting-I-O-to-offline-device-td3208156.html Still, i will try to change the raid controller and see what happens then. Regards, Tõnis Bramanis On 28.09.2011 10:38, Joseph Glanville wrote: > Hi, > > To add to the above it looks like you have a device driver or hardware > issue with your harddrive or raid controller. > I/O ratelimiting might hide the symptoms but not correct the problem. > After you have addressed that you can look at implementing rate limiting > via the methods described below: > > cgroups blk-io controller: > You can find documentation etc in the linux git repo at > /documentation/cgroups/blkio-controller.txt > > dm-ioband: > Wiki is here http://sourceforge.net/apps/trac/ioband/wiki/dm-ioband > > Both of these are external to Xen for the reasons outlined by previous > posts. > > Kind regards, > Joseph. > > 2011/9/28 Jeremy Fitzhardinge > > > On 09/27/2011 11:25 PM, Tõnis Bramanis wrote: > > Hello > > > > and thank You for the answer. Has anyone of You tried to limit i/o on > > the VMs? > > > > I have about 40 containers and when the i/o gets too high, the host > > will crash with this error: > > [23959.739698] sd 4:0:0:0: rejecting I/O to offline device > > 5 [23959.771158] Buffer I/O error on device dm-0, logical > block 40259 > > > > This is not a support request! I am just referring why i would > like to > > limit the disks i/o. > > I think that IO error is a real problem that you should try to solve, > rather than work around it by rate-limiting IO. > > J > > > > > Regards, > > Tõnis Bramanis > > > > On 27.09.2011 22 :58, Jeremy Fitzhardinge wrote: > >> On 09/27/2011 01:33 AM, Tõnis Bramanis wrote: > >>> Hello! > >>> > >>> Will disk i/o limiting be added in any future versions? I see it in > >>> the 4.0 feature requests, but not in any changelogs. > >> > >> I think the hope is that we can use the generic Linux mechanisms for > >> this rather than having to add anything Xen-specific. > >> > >> J > > > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel > > > > > -- > */ > Founder | Director | VP Research > Orion Virtualisation Solutions/* | www.orionvm.com.au > | Phone: 1300 56 99 52 | Mobile: 0428 754 846