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Remove hash_elements_max accounting from DBUF and ARC #16759

Merged
merged 1 commit into from
Nov 19, 2024
Merged

Remove hash_elements_max accounting from DBUF and ARC #16759

merged 1 commit into from
Nov 19, 2024

Commits on Nov 14, 2024

  1. Remove hash_elements_max accounting from DBUF and ARC 

    Those values require global atomics to get current hash_elements
values in few of the hottest code paths, while in all the years I
never cared about it.  If somebody wants, it should be easy to
get it by periodic sampling, since neither ARC header nor DBUF
counts change so fast that it would be difficult to catch.

For now I've left hash_elements_max kstat for ARC, since it was
used/reported by arc_summary and it would break older versions,
but now it just reports the current value.

Signed-off-by:	Alexander Motin <[email protected]>
Sponsored by:	iXsystems, Inc.
    @amotin
    amotin committed Nov 14, 2024
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