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author | Allan Jude <[email protected]> | 2022-12-13 20:27:54 -0500 |
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committer | GitHub <[email protected]> | 2022-12-13 17:27:54 -0800 |
commit | dc95911d21a19930848302aac9283fff68e4a41b (patch) | |
tree | 82f20fc9c52ce28b47987e8c7a089b37dbd100dd /include/sys | |
parent | 70ac2654f579e138d04ed747967fb0d603b0cacb (diff) |
zfs list: Allow more fields in ZFS_ITER_SIMPLE mode
If the fields to be listed and sorted by are constrained to those
populated by dsl_dataset_fast_stat(), then zfs list is much faster,
as it does not need to open each objset and reads its properties.
A previous optimization by Pawel Dawidek
(0cee24064a79f9c01fc4521543c37acea538405f) took advantage
of this to make listing snapshot names sorted only by name much faster.
However, it was limited to `-o name -s name`, this work extends this
optimization to work with:
- name
- guid
- createtxg
- numclones
- inconsistent
- redacted
- origin
and could be further extended to any other properties supported by
dsl_dataset_fast_stat() or similar, that do not require extra locking
or reading from disk.
This was committed before (9a9e2e343dfa2af28bf7910de77ae73aa006de62),
but was reverted due to a regression when used with an older kernel.
If the kernel does not populate zc->zc_objset_stats, we now fallback
to getting the properties via the slower interface, to avoid problems
with newer userland and older kernels.
Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: Allan Jude <[email protected]>
Closes #14110
Diffstat (limited to 'include/sys')
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