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e949d36040
The assertions are racy and the use of `membar_exit()` did nothing to fix that. The helpers use atomic functions, so we cleverly get values from the atomics that we can use to ensure that the assertions operate on the correct values. We also use `membar_producer()` prior to decrementing reference counts so that operations that happened prior to a decrement to 0 will be guaranteed to happen before the decrement on architectures that reorder atomics. This also slightly improves performance by eliminating unnecessary reads, although I doubt it would be measurable in any benchmark. Reviewed-by: Mateusz Guzik <mjguzik@gmail.com> Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu> Closes #13880 |
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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.