Bug#660960: tight loop attempting to madvise(..., MADV_DONTNEED) locked memory

[Bob Tracy]

Earlier messages in this bug-report thread indicated use of Flash would
also trigger the madvise() madness.  I'm "happy" (?) to report that
visiting Flash-enabled web sites reliably triggers this condition on the
Alpha platform for *all* releases of firefox/iceweasel after 9.0.1.

Michael Cree gets the nod for noting his backtraces ending in madvise()
while we Alpha users were trying to figure out what was going on.

Mike H. -- Thanks in advance for any fix/workaround you can come up
with.

--Bob