Comment # 8 on bug 1219284 from Andrea Manzini

from a first glance I can't tell any significant difference, apart from
user_namespace which is like doubled for 6.7 ; but some values like inode_cache
or dentry are higher in 6.6 than 6.7 .

I attached the content of both measurement if you want to take a look.

$ grep user_namespace slabinfo_6.*

slabinfo_6.6.txt:user_namespace        13     13    624   13    2 : tunables   
0    0    0 : slabdata      1      1      0

slabinfo_6.7.txt:user_namespace        25     25    632   25    4 : tunables   
0    0    0 : slabdata      1      1      0