Reproduce this issue on qemu-kvm-0.12.1.2-2.375.el6.x86_64.

1. Stop ksm service
[root@localhost home]# service  ksm stop
Stopping ksm:                                              [  OK  ]

2. [root@localhost home]# service ksm condrestart
Stopping ksm:                                              [  OK  ]
Starting ksm:                                              [  OK  ]
[root@localhost home]# 

Expected result:
After step 2, ksm should not be restarted if it's stopped previously.

Enrico, thanks for taking the time to enter a bug report with us. We appreciate
the feedback and look to use reports such as this to guide our efforts at
improving our products. That being said, we're not able to  guarantee the
timeliness or suitability of a resolution for issues entered here because this
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If this issue is critical or in any way time sensitive, please raise a ticket
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Created attachment 765072 [details]
Simple patch that fixes this issue

Simple patch that fixes this issue

(In reply to Enrico Scholz from comment #0)
> Description of problem:
> 
> [root@bintak qemu]# /etc/init.d/ksm stop
> Stopping ksm:                                              [  OK  ]
> [root@bintak qemu]# /etc/init.d/ksm condrestart
> Stopping ksm:                                              [  OK  ]
> Starting ksm:                                              [  OK  ]
> 
> --> 'service ksm condrestart' (which is executed by %post script) starts
> always ksm.
> 
> This happens due do broken status() function:
> 
> ----
> status() {
>          ...
>         RETVAL=0
>     fi; fi
> }
>   ...
> 
>   condrestart|try-restart)
>         status >/dev/null 2>&1 || exit 0
>         restart
> ----
> 
> E.g. 'RETVAL' is computed but never returned so that 'status' always
> succeeds and the 'restart' is executed unconditionally.
> 
> 
> Version-Release number of selected component (if applicable):
> 
> qemu-kvm-0.12.1.2-2.355.el6_4.5.x86_64

Thanks for your analysis Enrico. You are correct, it's been caused by return value not used. See comment #7 for fix :-)

Thanks,
Michal

Verified pass on qemu-kvm-0.12.1.2-2.377.el6.

[root@t2 home]# service  ksm stop
Stopping ksm:                                              [  OK  ]
[root@t2 home]# service  ksm status
ksm is not running
[root@t2 home]# service ksm condrestart
[root@t2 home]# 
[root@t2 home]# service  ksm status
ksm is not running
[root@t2 home]# 
[root@t2 home]# service ksm start
Starting ksm:                                              [  OK  ]
[root@t2 home]# service  ksm status
ksm is running
[root@t2 home]# service ksm condrestart
Stopping ksm:                                              [  OK  ]
Starting ksm:                                              [  OK  ]
[root@t2 home]# service  ksm status
ksm is running

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2013-1553.html