shared lwkt locks

[Alex Merritt]

Hi,

Does releasing a lwkt_token release all prior gettoken_shared invocations
to that lock, or is one required to perform reltoken as many times as
you've performed gettoken_shared? There is a warning in vm_object_drop that
the lock may be shared -- I was wondering what exactly that warning is
meant to warn against. Apologies if the answer is apparent somewhere.

Thanks,
Alex
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