Hi,
We have issue to run the crons running as on every one hour, but found these crons run many times in an hour, suspect logs found in the 'dmesg' and into /var/log/messages, can these cron issue is related to this error, please suggest me what can I do.

[root@ravi ~]# dmesg | tail
0: 3506467000050285
1: 3506466984050285
2: 3506466976050285
3: 3506466984050285
printk: 1105 messages suppressed.
Warning Timer ISR/1: Time went backwards: delta=-49780641 delta_cpu=14219359 shadow=3506471577811020 off=360705804 processed=3506471988050285 cpu_processed=3506471924050285
0: 3506471980050285
1: 3506471924050285
2: 3506471932050285
3: 3506471988050285
[root@ravi ~]# tail /var/log/messages
Jan 4 03:06:05 ravi kernel: 0: 3506606852050285
Jan 4 03:06:05 ravi kernel: 1: 3506606972050285
Jan 4 03:06:05 ravi kernel: 2: 3506606992050285
Jan 4 03:06:05 ravi kernel: 3: 3506606924050285
Jan 4 03:06:10 ravi kernel: printk: 1053 messages suppressed.
Jan 4 03:06:10 ravi kernel: Warning Timer ISR/1: Time went backwards: delta=-128671911 delta_cpu=11328089 shadow=3506610936255509 off=923320940 processed=3506611988050285 cpu_processed=3506611848050285
Jan 4 03:06:10 ravi kernel: 0: 3506611912050285
Jan 4 03:06:10 ravi kernel: 1: 3506611848050285
Jan 4 03:06:10 ravi kernel: 2: 3506611884050285
Jan 4 03:06:10 ravi kernel: 3: 3506611988050285

*/60 * * * * /home/ravi/ravi_cron/etl/aggPerson.sh

Jan 3 22:00:02 ravi crond[23103]: (ravi) CMD (/home/ravi/ravi_cron/etl/aggPerson.sh)
Jan 3 22:00:02 ravi crond[23775]: (ravi) CMD (/home/ravi/ravi_cron/etl/aggPerson.sh)
Jan 3 22:00:42 ravi crond[23961]: (ravi) CMD (/home/ravi/ravi_cron/etl/aggPerson.sh)
Jan 3 23:00:02 ravi crond[28680]: (ravi) CMD (/home/ravi/ravi_cron/etl/aggPerson.sh)
Jan 3 23:00:01 ravi crond[29387]: (ravi) CMD (/home/ravi/ravi_cron/etl/aggPerson.sh)
Jan 3 23:00:42 ravi crond[29670]: (ravi) CMD (/home/ravi/ravi_cron/etl/aggPerson.sh)
Jan 4 00:00:02 ravi crond[1894]: (ravi) CMD (/home/ravi/ravi_cron/etl/aggPerson.sh)
Jan 4 00:00:02 ravi crond[3346]: (ravi) CMD (/home/ravi/ravi_cron/etl/aggPerson.sh)
Jan 4 00:00:44 ravi crond[3573]: (ravi) CMD (/home/ravi/ravi_cron/etl/aggPerson.sh)
Jan 4 01:00:02 ravi crond[8427]: (ravi) CMD (/home/ravi/ravi_cron/etl/aggPerson.sh)
Jan 4 01:00:01 ravi crond[9196]: (ravi) CMD (/home/ravi/ravi_cron/etl/aggPerson.sh)
Jan 4 01:00:41 ravi crond[9362]: (ravi) CMD (/home/ravi/ravi_cron/etl/aggPerson.sh)
Jan 4 02:00:01 ravi crond[13828]: (ravi) CMD (/home/ravi/ravi_cron/etl/aggPerson.sh)
Jan 4 02:00:02 ravi crond[14381]: (ravi) CMD (/home/ravi/ravi_cron/etl/aggPerson.sh)
Jan 4 02:00:42 ravi crond[14600]: (ravi) CMD (/home/ravi/ravi_cron/etl/aggPerson.sh)

I know I am really late but today I faced this issue.This is a bug in Kernel and which is resolved in kernel-2.6.18-194.el5.Please upgrade to this kernel and that should fix the issue..