Alexander Motin 5b29e70ae1 Remove mg_allocators (#17192)
Previous code allowed each metaslab group to have different number
of allocators.  But in practice it worked only for embedded SLOGs,
relying on a number of conditions and creating a significant mine
field if any of those change.  I just stepped on one myself.

This change makes all groups to have spa_alloc_count allocators.
It may cost us extra 192 bytes of memory per normal top-level vdev
on large systems, but I find it a small price for cleaner and more
reliable code.

Signed-off-by:	Alexander Motin <mav@FreeBSD.org>
Sponsored by:	iXsystems, Inc.
Fixes #17188
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Paul Dagnelie <pcd@delphix.com>
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OpenZFS is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the OpenZFS community. This repository contains the code for running OpenZFS on Linux and FreeBSD.

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Official Resources

Installation

Full documentation for installing OpenZFS on your favorite operating system can be found at the Getting Started Page.

Contribute & Develop

We have a separate document with contribution guidelines.

We have a Code of Conduct.

Release

OpenZFS is released under a CDDL license. For more details see the NOTICE, LICENSE and COPYRIGHT files; UCRL-CODE-235197

Supported Kernels

  • The META file contains the officially recognized supported Linux kernel versions.
  • Supported FreeBSD versions are any supported branches and releases starting from 13.0-RELEASE.
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