Mike Gerdts f3f46b0e45 OpenZFS 9318 - vol_volsize_to_reservation does not account for raidz skip blocks ... When a volume is created in a pool with raidz vdevs and volblocksize != 128k, the volume can reference more space than is reserved with the automatically calculated refreservation. There are two deficiencies in vol_volsize_to_reservation that contribute to this: 1) Skip blocks may be added to keep each allocation a multiple of parity + 1. This is the dominating factor when volblocksize is close to 2^ashift. 2) raidz deflation for 128 KB blocks is different for most other block sizes. See "The theory of raidz space accounting" comment in libzfs_dataset.c for a full explanation. Authored by: Mike Gerdts <mike.gerdts@joyent.com> Reviewed by: Richard Elling <Richard.Elling@RichardElling.com> Reviewed by: Sanjay Nadkarni <sanjay.nadkarni@nexenta.com> Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com> Reviewed by: Matt Ahrens <matt@delphix.com> Reviewed by: Kody Kantor <kody.kantor@joyent.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Approved by: Dan McDonald <danmcd@joyent.com> Ported-by: Mike Gerdts <mike.gerdts@joyent.com> Porting Notes: * ZTS: wait for zvols to exist before writing * ZTS: use log_must_busy with {zpool|zfs} destroy OpenZFS-issue: https://www.illumos.org/issues/9318 OpenZFS-commit: https://github.com/illumos/illumos-gate/commit/b73ccab0 Closes #8973		2020-01-22 13:48:56 -08:00
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callbacks	ZTS: change $(cat) to $(<) for speedup	2018-10-31 12:00:06 -05:00
cmd	Use sigaction(2) instead of sigset(3) for portability	2019-04-30 20:45:17 -07:00
include	ZTS: Fix mmp_interval failure	2019-09-25 11:27:47 -07:00
tests	OpenZFS 9318 - vol_volsize_to_reservation does not account for raidz skip blocks	2020-01-22 13:48:56 -08:00
Makefile.am	OpenZFS 7503 - zfs-test should tail ::zfs_dbgmsg on test failure	2017-04-12 13:36:48 -07:00