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Turn default_bs and default_ibs into ZFS_MODULE_PARAMs

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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
This commit is contained in:
Mateusz Piotrowski
2023-01-11 18:38:20 +01:00
committed by Brian Behlendorf
parent 6281b5c488
commit 576d34cb11
3 changed files with 12 additions and 9 deletions
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module/os/freebsd/zfs/sysctl_os.c
-8
View File
@@ -356,14 +356,6 @@ SYSCTL_UINT(_vfs_zfs_zfetch, OID_AUTO, max_idistance, CTLFLAG_RWTUN,
/* dsl_pool.c */
/* dnode.c */
extern int zfs_default_bs;
SYSCTL_INT(_vfs_zfs, OID_AUTO, default_bs, CTLFLAG_RWTUN,
&zfs_default_bs, 0, "Default dnode block shift");
extern int zfs_default_ibs;
SYSCTL_INT(_vfs_zfs, OID_AUTO, default_ibs, CTLFLAG_RWTUN,
&zfs_default_ibs, 0, "Default dnode indirect block shift");
/* dsl_scan.c */