OpenZFS on OS X

Announcing the release of zfs-macOS-2.2.3 it is fairly close to upstream OpenZFS-2.2.3


** Changes since zfs-macOS-2.2.3rc3:

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* CPUID order fix (Intel)


Needed a little more work, panic in sysctl.


** Changes since zfs-macOS-2.2.3rc2:

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* CPUID order fix (Intel)


The fixed CPUID code was not quite right, and we decided to clean it up. We already have a
nice cpuid code that was commented out for KERNEL code by the Linux developers, to use the
Linux API instead. But macOS does not have an API we can call, so we might as well use it for both.
This makes it much easier to read, and it is correct.

Please verify it is correct on your Intel hardware.

On load, it will print something similar to:

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<zfs`spl_start (spl-osx.c:463)> SPL: loading
<zfs`spl_processor_init (spl-processor.c:158)> CPUID: osxsave sse sse2 sse3 ssse3 sse4.1 sse4.2
<zfs`spl_processor_init (spl-processor.c:166)> CPUID: avx avx2 aes pclmulqdq movbe
<zfs`org_openzfsonosx_zfs_zvol::start(IOService*) (zfs_osx.cpp:0)> ZFS: Loaded module v2.2.3-rc2, ZFS pool version 5000, ZFS filesystem version 5


Which can be verified with the userland command "sysctl hw", for example:

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# sysctl hw
hw.optional.aes: 1
hw.optional.avx1_0: 1
hw.optional.avx2_0: 1
hw.optional.avx512f: 0
[snip]


** Changes since zfs-macOS-2.2.3rc1:

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* CPUID order fix (Intel)


Fetching CPUID features used incorrect register order, which meant old Intel would
attempt to use AESNI/PCLQMUL when not available, causing panic.
Potentially new Intel might not think those were available, using generic versions.
No changes to ARM64, use rc1.

** Changes since zfs-macOS-2.2.2:

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* Tunable: "zfs_bclone_wait_dirty" set to wait instead of error from clonefile.
* DDT work (memory reduction, speedup)
* zfs list: add '-t fs' and '-t vol' options
* Add slow disk diagnosis to ZED
* Add 'zpool status -e' flag to see unhealthy vdevs
* BRT: Fix FICLONE/FICLONERANGE shortened copy
* (zpool: Add slot power control, print power status) not on macOS
* spa: make read/write queues configurable
* Allow block cloning across encrypted datasets
* chatGPT auto generates humorous filenames. [1]


[1] no.

**RC4:**



**RC3:**




**RC2:**




**RC1:**