Rob Norris 0e62831110 libzpool/cmn_err: remove suppression, add stop option, cleanup
A small uplift of the cmn_err() and panic() calls in userspace:

- remove the suppression on CE_NOTE. We have very few of these calls in
  a standard build, it's convenient for "print debugging".

- make prefixes clear and consistent.

- add LIBZPOOL_PANIC_STOP environment variable to send SIGSTOP to the
  process group on a panic, rather than abort(), so all threads remain
  alive for inspection.

Sponsored-by: Klara, Inc.
Sponsored-by: Wasabi Technology, Inc.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <alexander.motin@TrueNAS.com>
Signed-off-by: Rob Norris <rob.norris@klarasystems.com>
Closes #17834
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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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