eventfd counter, in hexadecimal. For epoll file descriptors (see epoll (7)), we see (since Linux ... file descriptors being monitored via the epoll file descriptor (see epoll_ctl (…exceptional condition, and poll (2) and epoll_wait (2) mark the file as having ... error condition for poll (2) and epoll_wait (2).) /proc/mounts Before Linux 2.4.19, this filefile descriptors produced by bpf (2), epoll_create (2), eventfd (2), inotify_init (2), perf ... surrounded by square brackets. For example, an epoll file descriptor will have a sym…amount of kernel memory consumed by the epoll interface. For further details, see epollexceptional condition, and poll (2) and epoll_wait (2) mark the file as having ... error condition for poll (2) and epoll_wait (2).) /proc/mounts Before Linux 2.4.19, this fileloop system calls ( poll (2), select (2), epoll (7), eventfd (2) and related calls