On Sat, Oct 30, 2021 at 03:06:31PM -0700, Mina Almasry wrote: > Not quite sufficient, no. The process may have lots of non performance > critical memory. The network service cares about specific memory > ranges and wants to know if those are backed by hugepages. Would it make sense to extend mincore() instead? We have 7 remaining bits per byte. But my question is, what information do you really want? Do you want to know if the memory range is backed by huge pages, or do you want to know if PMDs are being used to map the backing memory? What information would you want to see if, say, 64kB entries are being used on a 4kB ARM system where there's hardware support for those. Other architectures also have support for TLB entries that are intermediate between PTE and PMD sizes.
