On Mon, Oct 12, 2020 at 2:53 AM Muchun Song <songmuchun@xxxxxxxxxxxxx> wrote: > We are not complaining about TCP using too much memory, but how do > we know that TCP uses a lot of memory. When I firstly face this problem, > I do not know who uses the 25GB memory and it is not shown in the /proc/meminfo. > If we can know the amount memory of the socket buffer via /proc/meminfo, we > may not need to spend a lot of time troubleshooting this problem. Not everyone > knows that a lot of memory may be used here. But I believe many people > should know /proc/meminfo to confirm memory users. Well, I'd bet networking people know `ss -m` better than /proc/meminfo, generally speaking. The practice here is that if you want some networking-specific counters, add it to where networking people know better, that is, `ss -m` or /proc/net/... Or maybe the problem you described is not specific to networking at all, there must be some other places where pages are allocated but not charged. If so, adding a general mm counter in /proc/meminfo makes sense, but it won't be specific to networking. Thanks.
