On Thu, Mar 31, 2016 at 09:29:30PM -0600, Jens Axboe wrote: > On 03/31/2016 06:56 PM, Dave Chinner wrote: > >I'm not changing the host kernels - it's a production machine and so > >it runs long uptime testing of stable kernels. (e.g. catch slow > >memory leaks, etc). So if you've disabled throttling in the guest, I > >can't test the throttling changes. > > Right, that'd definitely hide the problem for you. I'll see if I can > get it in a reproducible state and take it from there. > > On your host, you said it's SCSI backed, but what does the device look like? HW RAID 0 w/ 1GB FBWC (dell h710, IIRC) of 2x200GB SATA SSDs (actually 256GB, but 25% of each is left as spare, unused space). Sustains about 35,000 random 4k write IOPS, up to 70k read IOPS. Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
