Add a UMA zone flag to disable the use of buckets
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Authored by markj on Apr 24 2018, 3:27 PM.

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alc
kib
jeff

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rS332968: Add a UMA zone flag to disable the use of buckets.

Summary

This allows the creation of zones which don't do any caching in front of
the keg. If the zone is a cache zone, this means that UMA will not
attempt any memory allocations when allocating an item from the backend.
This is intended for use by netdump, after a panic.