409f5fb563
9204: feat: more accurate memory usage info on glibc Linux r=jonas-schievink a=jonas-schievink This adds support for the new `mallinfo2` API added in glibc 2.33. It addresses a shortcoming in the `mallinfo` API where it was unable to handle memory usage of more than 2 GB, which we sometimes exceed. Blocked on https://github.com/rust-lang/libc/pull/2228 Co-authored-by: Jonas Schievink <jonasschievink@gmail.com>