From cec59c440a05c241846e8fe9d2575a2dafb56fd9 Mon Sep 17 00:00:00 2001 From: Jinliang Zheng Date: Tue, 15 Apr 2025 23:36:58 +0800 Subject: kernfs: switch global kernfs_idr_lock to per-fs lock The kernfs implementation has big lock granularity(kernfs_idr_lock) so every kernfs-based(e.g., sysfs, cgroup) fs are able to compete the lock. This patch switches the global kernfs_idr_lock to per-fs lock, which put the spinlock into kernfs_root. Signed-off-by: Jinliang Zheng Acked-by: Tejun Heo Link: https://lore.kernel.org/r/20250415153659.14950-2-alexjlzheng@tencent.com Signed-off-by: Greg Kroah-Hartman --- fs/kernfs/kernfs-internal.h | 1 + 1 file changed, 1 insertion(+) (limited to 'fs/kernfs/kernfs-internal.h') diff --git a/fs/kernfs/kernfs-internal.h b/fs/kernfs/kernfs-internal.h index 40a2a9cd819d..24e9514565ac 100644 --- a/fs/kernfs/kernfs-internal.h +++ b/fs/kernfs/kernfs-internal.h @@ -40,6 +40,7 @@ struct kernfs_root { /* private fields, do not use outside kernfs proper */ struct idr ino_idr; + spinlock_t kernfs_idr_lock; /* root->ino_idr */ u32 last_id_lowbits; u32 id_highbits; struct kernfs_syscall_ops *syscall_ops; -- cgit v1.2.3