From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jonathan Tripathy Subject: Re: Expected Behavior Date: Sat, 01 Sep 2012 13:47:52 +0100 Message-ID: <504203F8.4000302@abpni.co.uk> References: <503F132E.6060305@abpni.co.uk> <503F147A.10101@abpni.co.uk> <239802233aa1dabc37f60b293d2941c9@abpni.co.uk> <20120830212841.GB14247@google.com> <503FF05B.1040506@abpni.co.uk> <6035A0D088A63A46850C3988ED045A4B29A7D49D@BITCOM1.int.sbss.com.au> <151f74230aeb6825d9b8b633881d5e6c@abpni.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <151f74230aeb6825d9b8b633881d5e6c-Nf8S+5hNwl710XsdtD+oqA@public.gmane.org> Sender: linux-bcache-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Jonathan Tripathy Cc: James Harper , Kent Overstreet , linux-bcache-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-bcache@vger.kernel.org On 31/08/2012 13:41, Jonathan Tripathy wrote: > > > On 31.08.2012 13:36, Jonathan Tripathy wrote: >> On 31.08.2012 04:47, James Harper wrote: >>>> Hi Kent, >>>> >>>> I'm going to try and reproduce it myself as well. I just used >>>> IOMeter in a >>>> Windows DomU with 30 workers, each having an io depth of 256. A *very* >>>> heavy workload indeed, but my point was to see if I could break >>>> something. >>>> Unless the issue is specific to windows causing problems (NTFS or >>>> whatever), >>>> I'm guessing running fio with 30 jobs and an iodepth of 256 would >>>> probably >>>> produce a similar load. >>>> >>>> BTW, do you have access to a Xen node for testing? >>>> >>> >>> Does the problem resolve itself after you shut down the windows DomU? >>> Or only when you reboot the whole Dom0? >>> >> >> Hi There, >> >> I managed to reproduce this again. I have to reboot the entire Dom0 >> (the physical server) for it to work properly again. >> >> James, are you able to reproduce this? Kent, are there any other >> tests/debug output you need from me? >> > > BTW, I was using IOMeter's 'default' Access Specification with the > following modifications: 100% random, 66% read, 33% write, and a 2kB > size. My bcache is formatted for 512bytes. > -- > Kent, is there any debug output of some sort I could switch on and help you figure out what's going on? If needs be, I can give you access to my setup here where you can run these tests yourself, if you're not keen installing Xen on your end :) Thanks