As far as I can tell, the latest kmod-kvdo package for SL7.5 is version 6.1.0-171-17.el7_5: $ rpm -q --requires -p ./x86_64/updates/fastbugs/kmod-kvdo-6.1.0.171-17.el7_5.x86_64.rpm | grep dm_get_device kernel(dm_get_device) = 0xf3d46cd5 ...while the latest kernel package is version 3.10.0-862-6.3.el7: $ rpm -q --provides -p ./x86_64/updates/security/kernel-3.10.0-862.6.3.el7.x86_64.rpm | grep dm_get_device kernel(dm_get_device) = 0x602cd186 As you can see from the requires/provides, these packages are incompatible. (A few other dm_xxx symbols are similarly mismatched.) Note that the next-to-latest kernel, 3.10.0-862.3.3, provides the symbol versions that the latest kmod-kvdo is expecting. So it appears that kmod-kvdo is out of date (?) - Pat