gero keeps generating DAG

[apple601601601]

gero keeps generating DAG and used 100% CPU of all cores and fiels starting to fill up my home/.ethash directory when I start it using the default startup.sh,
then I changed the parameter in startup.sh to the following:
cmd="bin/gero --config ${CONFIG_PATH} --datadir ${DATADIR_OPTION} --port ${PORT_OPTION} ${NET_OPTION} ${RPC_OPTION} ${KEYSTORE_OPTION} --ethash.dagdir ${DEFAULT_ETH_HASH_DAG_DIR} --cache 1024 --ethash.cachesinmem 1 --ethash.cachesondisk 10 --ethash.dagsinmem 1 --ethash.dagsondisk 4 --gcmode full --syncmode fast --fakepow --nousb"
Though the space now fills up slower, the program still tries to generage DAG after it started for a while and keeps using 100% CPU.
Could you pease help have a look?
Part of the logs below

INFO [07-13|21:06:28.376] Generating DAG in progress               epoch=33 percentage=99 elapsed=8m40.129s
INFO [07-13|21:06:28.481] Generated ethash verification cache      epoch=33 elapsed=8m40.233s
INFO [07-13|21:06:29.201] Generating DAG in progress               epoch=34 percentage=1  elapsed=6.504s
INFO [07-13|21:06:29.491] Generating DAG in progress               epoch=33 percentage=93 elapsed=7m42.946s
INFO [07-13|21:06:30.325] Generating DAG in progress               epoch=34 percentage=2  elapsed=7.628s
INFO [07-13|21:06:30.573] Generating DAG in progress               epoch=33 percentage=98 elapsed=8m22.553s
INFO [07-13|21:06:30.640] Generating DAG in progress               epoch=33 percentage=94 elapsed=7m44.095s
INFO [07-13|21:06:31.405] Generating DAG in progress               epoch=34 percentage=3  elapsed=8.708s
INFO [07-13|21:06:31.820] Generating DAG in progress               epoch=33 percentage=95 elapsed=7m45.275s
INFO [07-13|21:06:32.354] Generating DAG in progress               epoch=34 percentage=4  elapsed=9.657s
INFO [07-13|21:06:32.502] Generating DAG in progress               epoch=33 percentage=99 elapsed=8m44.604s
INFO [07-13|21:06:32.561] Generated ethash verification cache      epoch=33 elapsed=8m44.663s
INFO [07-13|21:06:33.022] Generating DAG in progress               epoch=33 percentage=96 elapsed=7m46.477s
INFO [07-13|21:06:33.048] Generating DAG in progress               epoch=34 percentage=5  elapsed=10.351s
INFO [07-13|21:06:33.658] Imported new chain segment               blocks=29  txs=3  mgas=0.075 elapsed=21.379s   mgasps=0.004 number=988882 hash=819e89…3a22dd cache=74.15mB
INFO [07-13|21:06:33.668] Generating DAG in progress               epoch=33 percentage=99 elapsed=8m23.906s
INFO [07-13|21:06:33.792] Generated ethash verification cache      epoch=33 elapsed=8m24.030s
INFO [07-13|21:06:34.006] Generating DAG in progress               epoch=34 percentage=6  elapsed=11.309s
INFO [07-13|21:06:34.458] Generating DAG in progress               epoch=33 percentage=97 elapsed=7m47.913s
INFO [07-13|21:06:34.559] Generating DAG in progress               epoch=34 percentage=7  elapsed=11.862s
INFO [07-13|21:06:34.573] Generating DAG in progress               epoch=33 percentage=99 elapsed=8m29.754s
INFO [07-13|21:06:34.617] Generated ethash verification cache      epoch=33 elapsed=8m29.798s
INFO [07-13|21:06:34.741] Generating DAG in progress               epoch=33 percentage=99 elapsed=8m26.439s
INFO [07-13|21:06:34.757] Generated ethash verification cache      epoch=33 elapsed=8m26.456s
INFO [07-13|21:06:35.050] Generating DAG in progress               epoch=34 percentage=8  elapsed=12.353s
INFO [07-13|21:06:35.397] Generating DAG in progress               epoch=33 percentage=99 elapsed=8m32.158s
INFO [07-13|21:06:35.411] Generated ethash verification cache      epoch=33 elapsed=8m32.172s
INFO [07-13|21:06:35.472] Generating DAG in progress               epoch=34 percentage=9  elapsed=12.775s
INFO [07-13|21:06:35.533] Generating DAG in progress               epoch=33 percentage=99 elapsed=8m29.205s
INFO [07-13|21:06:35.544] Generated ethash verification cache      epoch=33 elapsed=8m29.215s
INFO [07-13|21:06:35.763] Generating DAG in progress               epoch=33 percentage=98 elapsed=7m49.217s
INFO [07-13|21:06:35.806] Generating DAG in progress               epoch=34 percentage=10 elapsed=13.108s
INFO [07-13|21:06:36.106] Generating DAG in progress               epoch=34 percentage=11 elapsed=13.409s
INFO [07-13|21:06:36.440] Generating DAG in progress               epoch=34 percentage=12 elapsed=13.743s
INFO [07-13|21:06:36.767] Generating DAG in progress               epoch=34 percentage=13 elapsed=14.070s
INFO [07-13|21:06:37.051] Generating DAG in progress               epoch=34 percentage=14 elapsed=14.354s
INFO [07-13|21:06:37.334] Generating DAG in progress               epoch=34 percentage=15 elapsed=14.637s
INFO [07-13|21:06:37.397] Generating DAG in progress               epoch=33 percentage=99 elapsed=8m29.209s
INFO [07-13|21:06:37.427] Generated ethash verification cache      epoch=33 elapsed=8m29.240s
INFO [07-13|21:06:37.430] Generating DAG in progress               epoch=33 percentage=99 elapsed=8m29.409s
INFO [07-13|21:06:37.493] Generated ethash verification cache      epoch=33 elapsed=8m29.472s
INFO [07-13|21:06:37.632] Generating DAG in progress               epoch=34 percentage=16 elapsed=14.935s
INFO [07-13|21:06:37.861] Generating DAG in progress               epoch=34 percentage=17 elapsed=15.164s
INFO [07-13|21:06:38.089] Generating DAG in progress               epoch=34 percentage=18 elapsed=15.392s
INFO [07-13|21:06:38.322] Generating DAG in progress               epoch=34 percentage=19 elapsed=15.625s
INFO [07-13|21:06:38.565] Generating DAG in progress               epoch=34 percentage=20 elapsed=15.868s
INFO [07-13|21:06:38.807] Generating DAG in progress               epoch=34 percentage=21 elapsed=16.110s
INFO [07-13|21:06:39.039] Generating DAG in progress               epoch=34 percentage=22 elapsed=16.342s
INFO [07-13|21:06:39.276] Generating DAG in progress               epoch=34 percentage=23 elapsed=16.579s
INFO [07-13|21:06:39.507] Generating DAG in progress               epoch=34 percentage=24 elapsed=16.810s
INFO [07-13|21:06:39.745] Generating DAG in progress               epoch=34 percentage=25 elapsed=17.048s
INFO [07-13|21:06:39.978] Generating DAG in progress               epoch=34 percentage=26 elapsed=17.281s
INFO [07-13|21:06:40.213] Generating DAG in progress               epoch=34 percentage=27 elapsed=17.516s
INFO [07-13|21:06:40.410] Generating DAG in progress               epoch=33 percentage=99 elapsed=7m53.865s
INFO [07-13|21:06:40.422] Generated ethash verification cache      epoch=33 elapsed=7m53.877s
INFO [07-13|21:06:40.445] Generating DAG in progress               epoch=34 percentage=28 elapsed=17.748s

[gordon-sero]

@apple601601601 thank you
now the v1.0.0-rc2 fixed this bug.

[apple601601601]

@apple601601601 thank you
now the v1.0.0-rc2 fixed this bug.

Confirm fixed.
cmd changed to following and working fine.

cmd="bin/gero --config ${CONFIG_PATH} --datadir ${DATADIR_OPTION} --port ${PORT_OPTION} ${NET_OPTION} ${RPC_OPTION} ${KEYSTORE_OPTION} --ethash.dagdir ${DEFAULT_ETH_HASH_DAG_DIR} --nousb"