Cherry-pick of 6ce52f70cc1e6450df3454f19743a29295b84050.
disk plugin: Support Linux kernels with additional fields.
Linux 4.19 will add additional counters, which caused this plugin to
bail out because it checked the number of fields exactly instead of
ensuring that there are at least the number of fields expected.
Cherry-pick of 6ce52f70cc1e6450df3454f19743a29295b84050.
disk plugin: Support Linux kernels with additional fields.
Linux 4.19 will add additional counters, which caused this plugin to bail out because it checked the number of fields exactly instead of ensuring that there are at least the number of fields expected.
Fixes: #2951