Second naive question about map operation

Jonathan S. Shapiro shap at
Thu Dec 4 20:40:14 CET 2003

A second naive question.

Imagine that thread A performs separate map operations to each of B and
C (maps of the same thing). This results in a dependency relationship of
the form:

    / \
   B   C

Given that these operations have happened, is there a way for A to
revoke the mapping held by B without also revoking the mapping held by

Does it matter?
Jonathan S. Shapiro <shap at>

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