On 20/05/14 11:54, Vitaly Kuznetsov wrote: > Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> writes: > >> 1) ramdisks (/dev/ram*) (persistent grants and indirect descriptors >> disabled) > > sorry, there was a typo. persistent grants and indirect descriptors are > enabled with ramdisks, otherwise such testing won't make any sense. I'm not sure how is that possible, from your description I get that you are using 3.11 on the Dom0, which means blkback has support for persistent grants and indirect descriptors, but the guest is RHEL7, that's using the 3.10 kernel AFAICT, and this kernel only has persistent grants implemented. Roger. -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html