No way to determine buffer size contents at runtime

[rountree]

MAX_WLIST_BSIZE is the maximum size of an allowlist and is #defined in msr_whitelist.c as ((128 * 1024) + 1).

The maximum size of a batch array is (2^14-1), which is a function of the ioctl() interface.

While both limits can be added to the documentation, it's not clear that most users will have access to the documentation (as we're not installing man pages in expected places and the sysadmin will be doing the installation).

Should these limits be provided as part of the msr_version device?

[rountree]

Looks like the maximum size of a batch array is whatever can be described by an unsigned long. Need to do some testing.