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When a vdev is to be expanded -- either via `zpool online -e` or via the autoexpand option -- a SPA_ASYNC_CONFIG_UPDATE request is queued to be handled via an asynchronous worker thread (spa_async_thread). This normally happens almost immediately; but will be delayed up to zfs_ccw_retry_interval seconds (default 5 minutes) if an attempt to write the zpool configuration cache failed. When FreeBSD boots ZFS-root VM images generated using `makefs -t zfs`, the zpoolupgrade rc.d script runs `zpool upgrade`, which modifies the pool configuration and triggers an attempt to write to the cache file. This attempted write fails because the filesystem is still mounted read-only at this point in the boot process, triggering a 5-minute cooldown before SPA_ASYNC_CONFIG_UPDATE requests will be handled by the asynchronous worker thread. When expanding a vdev, reset the "when did a configuration cache write last fail" value so that the SPA_ASYNC_CONFIG_UPDATE request will be handled promptly. A cleaner but more intrusive option would be to use separate SPA_ASYNC_ flags for "configuration changed" and "try writing the configuration cache again", but with FreeBSD 14.0 coming very soon I'd prefer to leave such refactoring for a later date. Reviewed-by: Alexander Motin <mav@FreeBSD.org> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Colin Percival <cperciva@FreeBSD.org> Closes #15405 |
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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.
Official Resources
- Documentation - for using and developing this repo
- ZoL Site - Linux release info & links
- Mailing lists
- OpenZFS site - for conference videos and info on other platforms (illumos, OSX, Windows, etc)
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
METAfile contains the officially recognized supported Linux kernel versions. - Supported FreeBSD versions are any supported branches and releases starting from 12.2-RELEASE.