This article explains what file descriptors are, how the Linux kernel manages them, and examines Android’s two detection mechanisms—fdsan and fdtrack—by detailing their design concepts and implementation, helping readers grasp and troubleshoot file‑descriptor anomalies in Android systems.
This guide explains how to view and modify Linux's open file descriptor limits using commands like ulimit, sysctl, and by editing system configuration files, covering both system-wide and per‑user settings for improved application performance.
This guide explains how to view current soft and hard file descriptor limits on Linux, adjust them per session with ulimit, modify system-wide limits via sysctl and /etc/security/limits.conf, and make the changes persistent across reboots.
This article explains the structure and operation of Linux timerfd, covering its representation in /proc, the timerfd_create/settime/gettime system calls, internal kernel structures, and how timerfd integrates with epoll for event-driven programming.
This article explains the true nature of a file descriptor (fd) in Linux, tracing how the kernel represents open files through task_struct, files_struct, fdtable, and inode structures, and shows how these layers interact with system calls like open, read, write, dup, and fork.
