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Turn default_bs and default_ibs into ZFS_MODULE_PARAMs

Description

Turn default_bs and default_ibs into ZFS_MODULE_PARAMs

The default_bs and default_ibs tunables control the default block size
and indirect block size.

So far, default_bs and default_ibs were tunable only on FreeBSD, e.g.,

    sysctl vfs.zfs.default_ibs

Remove the FreeBSD-specific sysctl code and expose default_bs and
default_ibs as tunables on both Linux and FreeBSD using
ZFS_MODULE_PARAM.

One of the use cases for changing the values of those tunables is to
lower the indirect block size, which may improve performance of large
directories (as discussed during the OpenZFS Leadership Meeting
on 2022-08-16).

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Signed-off-by: Mateusz Piotrowski <mateusz.piotrowski@klarasystems.com>
Sponsored-by: Wasabi Technology, Inc.
Closes #14293

Details

Provenance
Mateusz Piotrowski <mateusz.piotrowski@klarasystems.com>Authored on Jan 11 2023, 5:38 PM
GitHub <noreply@github.com>Committed on Jan 11 2023, 5:38 PM
Parents
rG4ba3eff2a62a: Update META to 6.1 kernel
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Event Timeline

GitHub <noreply@github.com> committed rG926715b9fcf0: Turn default_bs and default_ibs into ZFS_MODULE_PARAMs (authored by Mateusz Piotrowski <mateusz.piotrowski@klarasystems.com>).Jan 11 2023, 5:38 PM