[Swift-devel] Re: scheduler changes to deal with fast-failing sites

[Ben Clifford]

r2058 results in scheduling hangs, due to the way in which the overloaded 
host count is cached and not recomputed at the appropriate time.

The attached hacky patch demonstrates a different (more correct though 
less efficient) was of counting the overloaded host count.

I can reliably get a hang after about 10 minutes running:

 cd tests/language-behaviour/
 while true; do swift 0755-ext-mapper.swift ; done

which goes away with this patch.

Patch is at http://www.ci.uchicago.edu/~benc/overload-chk

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