Description of problem:

[...]
  Updating   : 2:qemu-common-0.15.1-1.fc16.x86_64                    1/18 
Non-fatal POSTIN scriptlet failure in rpm package 2:qemu-common-0.15.1-1.fc16.x86_64
Operation failed: No such file or directory
Operation failed: No such file or directory
warning: %post(qemu-common-2:0.15.1-1.fc16.x86_64) scriptlet failed, exit status 1
  Updating   : 2:qemu-system-x86-0.15.1-1.fc16.x86_64                2/18 
[...]

This also appears to cause the later cleanup on qemu-common
to fail (hangs on a futex).

Version-Release number of selected component (if applicable):

2:0.15.1

How reproducible:

I only tried it once.

Steps to Reproduce:
1. yum update qemu (old version was 2:qemu-common-0.15.0-5.fc16.x86_64)
2.
3.
  
Actual results:

%postin script fails as above.

Expected results:

Should not fail.

Additional info:

Here is the script ...

getent group kvm >/dev/null || groupadd -g 36 -r kvm
getent group qemu >/dev/null || groupadd -g 107 -r qemu
getent passwd qemu >/dev/null || \
  useradd -r -u 107 -g qemu -G kvm -d / -s /sbin/nologin \
    -c "qemu user" qemu

/bin/systemctl --global enable ksm.service
/bin/systemctl --global enable ksmtuned.service

The errors appear to come from the systemctl commands at the
end.  Is this a systemd error?

$ rpm -q systemd
systemd-35-1.fc16.x86_64