class SetVerboseLogging

Verbose logging includes constraints set via SetConstraints() from each

client along with info set via SetDebugClientInfo() and the structure of

the tree of Node(s).

Normally sysmem prints only a single line complaint when aggregation

fails, with just the specific detailed reason that aggregation failed,

with minimal context. While this is often enough to diagnose a problem

if only a small change was made and the system had been working before

the small change, it's often not particularly helpful for getting a new

buffer collection to work for the first time. Especially with more

complex trees of nodes, involving things like AttachToken(),

SetDispensable(), BufferCollectionTokenGroup nodes, and associated

sub-trees of nodes, verbose logging may help in diagnosing what the tree

looks like and why it's failing a logical allocation, or why a tree or

sub-tree is failing sooner than expected.

The intent of the extra logging is to be acceptable from a performance

point of view, if only enabled on a low number of buffer collections.

If we're not tracking down a bug, we shouldn't send this message.

If too many participants leave verbose logging enabled, we may end up

needing to require that system-wide sysmem verbose logging be permitted

via some other setting, to avoid sysmem spamming the log too much due to

this message.

This may be a NOP for some nodes due to intentional policy associated

with the node, if we don't trust a node enough to let it turn on verbose

logging.