---
title: "Ab Mughal (@abmughl) | Hashnode"
description: "Ab Mughal (@abmughl) writes on Hashnode. Read their latest articles and follow their work."
url: "https://hashnode.com/@abmughl"
---

@abmughl

# Ab Mughal

@abmughl · Joined November 2026

### [Linux Kernel VFS Pathname Lookup: RCU-Walk vs. Ref-Walk and dcache Scaling](https://trendspike.hashnode.dev/linux-kernel-vfs-pathname-lookup-rcu-walk-vs-ref-walk-and-dcache-scaling?utm_source=hashnode&utm_medium=feed)

In high-concurrency Linux server environments, open(), stat(), and execve() system calls resolve file paths through the Virtual Filesystem (VFS) layer (fs/namei.c). Under multi-core load, naive refere

1 min read · [trendspike.hashnode.dev](https://trendspike.hashnode.dev/linux-kernel-vfs-pathname-lookup-rcu-walk-vs-ref-walk-and-dcache-scaling?utm_source=hashnode&utm_medium=feed)

[1h ago](https://hashnode.com/posts/linux-kernel-vfs-pathname-lookup-rcu-walk-vs-ref-walk-and-dcache-scaling/6af4ecb8d2fb9a9d747b58ba)