[add linux-mm mailing list] On 8/30/21 12:44 AM, Mikko Rantalainen wrote:
It's not immediately obvious from fs/proc/meminfo.c function meminfo_proc_show() but the output of Cached: field seems to always include all of Shmem: field, too. Is this intentional? Usually cache is something that can be discarded if needed but shared memory (e.g. used to contain files in tmpfs) cannot be discarded without a data-loss. As such, I'd argue that it shouldn't be included in the Cached: output. A simple fix could be - cached = global_node_page_state(NR_FILE_PAGES) - - total_swapcache_pages() - i.bufferram; + cached = global_node_page_state(NR_FILE_PAGES) - + total_swapcache_pages() + - i.bufferram - i.sharedram;
-- ~Randy
