[Crash-utility] crash-7.3.2 very long list iteration progressively increasing memory usage

Hi Dave, We have a fairly large vmcore (around 250GB) that has a very long kmem cache we are trying to determine whether a loop exists in it. The list has literally billions of entries. Before you roll your eyes hear me out. Just running the following command crash> list -H 0xffff8ac03c81fc28 > list-yeller.txt Seems to increase the memory of crash usage over time very significantly, to the point that we have the following with top output: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 25522 dwysocha 20 0 11.2g 10g 5228 R 97.8 17.5 1106:34 crash   When I started the command yesterday it was adding around 4 million entries to the file per minute. At the time I estimated the command would finish in around 10 hours and I could use it to determine if there was a loop in the list or not. But today has slowed down to less than 1/10th that, to around 300k entries per minute. Is this type of memory usage with list enumeration expected or not? I have not yet begun to delve into the code, but figured you might have a gut feel whether this is expected and fixable or not. Thanks.