linux-kernel - [PATCH kernfs 0/3] kernfs: switch global locks to per-fs lock

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Message-ID: <20250411183109.6334-1-alexjlzheng@tencent.com>
Date: Sat, 12 Apr 2025 02:31:06 +0800
From: alexjlzheng@...il.com
To: gregkh@...uxfoundation.org,
	tj@...nel.org
Cc: alexjlzheng@...cent.com,
	linux-kernel@...r.kernel.org
Subject: [PATCH kernfs 0/3] kernfs: switch global locks to per-fs lock

From: Jinliang Zheng <alexjlzheng@...cent.com>

The kernfs implementation has big lock granularity so every kernfs-based
(e.g., sysfs, cgroup) fs are able to compete the locks. This patchset
switches the global locks to per-fs locks.

In fact, the implementation of global locks has not yet introduced
performance issues. But in the long run, more and more file systems will
be implemented based on the kernfs framework, so this optimization is
meaningful.

Jinliang Zheng (3):
  kernfs: switch global kernfs_idr_lock to per-fs lock
  kernfs: switch global kernfs_rename_lock to per-fs lock
  kernfs: switch global kernfs_pr_cont_lock to per-fs lock

 fs/kernfs/dir.c             | 74 ++++++++++++++++++-------------------
 fs/kernfs/kernfs-internal.h | 27 ++++++++++++--
 2 files changed, 59 insertions(+), 42 deletions(-)

-- 
2.48.1