On Thu, 27 Apr 2006, Dmitry Pryanishnikov wrote:

options         INVARIANTS
options         INVARIANT_SUPPORT

In FreeBSD 5.x and FreeBSD 6.x, the INVARIANTS option has been significantly expanded to test a much larger set of invariants, and also incorporate kernel use-after-free checking, which involves memory scrubbing. This is great for catching bugs, but it will have a significant performance impact, especially for kernel-intensive loads.

Robert N M Watson
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