Hi, currently the scsi-mq is set to Y, since 3.18-rc1 merge. The option enables a feature that makes advantage of enterprise-class storage. It's known not to perform well on slower devices [1] and lacks scheduler support. We'll set the option to N in our stable kernels. The lack of scheduler support can cause significant performance drop. Vojtech reports 10-50x slowdown on random read workloads, the disks seek all over the platters due to the missing io scheduler optimizations. As most of our users are not likely to run on high-end storage devices or otherwise benefit from the scsi-mq feature, I believe it's safe to turn the scsi-mq option off. Once the io scheduler support is availabe we can enable it again. The change will be done for all architectures and all kernel flavors (30 changes in total). [1] http://www.spinics.net/lists/linux-scsi/msg75246.html -- To unsubscribe, e-mail: opensuse-kernel+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-kernel+owner@opensuse.org