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authorDavid Hashe <david.hashe@amd.com>2015-07-20 09:15:18 -0500
committerDavid Hashe <david.hashe@amd.com>2015-07-20 09:15:18 -0500
commit21aa5734a0f2c03263e26c66e5cd95ad64c70697 (patch)
tree43cf18ec392aea120c025bf818a0ce30efab201c /src/mem/ruby/common
parent63a9f10de80a2a117aa06858e65dee2b6654762f (diff)
downloadgem5-21aa5734a0f2c03263e26c66e5cd95ad64c70697.tar.xz
ruby: fix deadlock bug in banked array resource checks
The Ruby banked array resource checks (initiated from SLICC) did a check and allocate at the same time. If a transition needs more than one resource, then it might check/allocate resource #1, then fail to get resource #2. Another transition might then try to get the same resources, but in reverse order. Deadlock. This patch separates resource checking and resource reservation into two steps to avoid deadlock.
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