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If we receive a DRR_FREEOBJECTS as the first entry in an object range, this might end up producing a hole if the freed objects were the only existing objects in the block. If the txg starts syncing before we've processed any following DRR_OBJECT records, this leads to a possible race where the backing arc_buf_t gets its psize set to 0 in the arc_write_ready() callback while still being referenced from a dirty record in the open txg. To prevent this, we insert a txg_wait_synced call if the first record in the range was a DRR_FREEOBJECTS that actually resulted in one or more freed objects. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: David Hedberg <david.hedberg@findity.com> Sponsored by: Findity AB Closes #11893 Closes #14358 |
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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.