[dfmm] === scenario: evict_for_node top-of-GTT walk ===
[dfmm] reserved top node [fffff000 + 1000] -> 0
[dfmm] reserved mid node [10000000 + 1000] -> 0
[dfmm] walk [ffffe000, 100001000) on mm [0, 100000000), mm end = 100000000
[dfmm]   visit 1: start=fffff000 size=1000 allocated=1 color=0
[dfmm]   visit 2: start=100000000 size=ffffffff00000000 allocated=0 color=0   <== HEAD SENTINEL
[dfmm]   visit 3: start=10000000 size=1000 allocated=1 color=0
[dfmm]   visit 4: start=fffff000 size=1000 allocated=1 color=0
[dfmm]   visit 5: start=100000000 size=ffffffff00000000 allocated=0 color=0   <== HEAD SENTINEL
[dfmm]   visit 6: start=10000000 size=1000 allocated=1 color=0
[dfmm]   visit 7: start=fffff000 size=1000 allocated=1 color=0
[dfmm]   visit 8: start=100000000 size=ffffffff00000000 allocated=0 color=0   <== HEAD SENTINEL
[dfmm] RESULT: visited=8 head_sentinel_yielded=1 non_terminating=1
[dfmm] dfmm_poc unloaded