On Mon, Feb 26, 2024 at 1:12 PM Wei Xu <weixugc@xxxxxxxxxx> wrote: > > On Tue, Feb 20, 2024 at 1:46 PM Sourav Panda <souravpanda@xxxxxxxxxx> wrote: > > > > Adds two new per-node fields, namely nr_memmap and nr_memmap_boot, > > to /sys/devices/system/node/nodeN/vmstat and a global Memmap field > > to /proc/meminfo. This information can be used by users to see how > > much memory is being used by per-page metadata, which can vary > > depending on build configuration, machine architecture, and system > > use. > > /proc/vmstat also has the system-wide nr_memmap and nr_memmap_boot. > Given that nr_memmap in /proc/vmstat provides the same info (in > different units) as Memmap in /proc/meminfo, it would be better to > remove Memmap from /proc/meminfo to avoid duplication and confusion. There are many items both in meminfo and in vmstat. Given that /proc/meminfo covers all kmem memory, it is beneficial to keep the kmem part of memmap in meminfo as another classification item. Pasha
