Author: George Wilson george.wilson@delphix.com

Portions Contributed by: Brad Lewis brad.lewis@delphix.com

Portions Contributed by: Pavel Zakharov pavel.zakharov@delphix.com
For reference, this wad includes:
From Delphix:

DLPX-52519 DxOS needs support for Hyper-V drivers
DLPX-52831 guid is leaked in storvsc_config_one
AZ-307 rem_drv of hv_storvsc driver hangs
AZ-308 Storvsc driver needs polling capability.
ATA reads timeout after Azure update
Fix missing mutex_exit() calls.

And a couple of very minor updates from OmniOS to cater for changes in gate:

Adjust hyperv for new C99 Makefile macros
Remove duplicate definition of __packed
Do not package 32bit kernel drivers

Caveats:
This batch represents the initial code drop from Delphix. It works generally well, but it has the following known issues:

Panics if booted in a VM with a single virtual CPU
Panics if booted with low memory (< 1GiB)
Occasionally panics on first boot
Time-sync does not function and error messages are logged
Console output is too verbose

These are fixed in OmniOS and will be addressed in follow-up issues/RTIs.

In addition to being used to run Delphix in Azure, These drivers have been running in various OmniOS development VMs under Hyper-V on Windows 10 since they were integrated.