From 5b0d8effdd81c0174f126196d9a829be9aa5c0b2 Mon Sep 17 00:00:00 2001 From: Austin Date: Wed, 6 Apr 2022 02:57:29 +0000 Subject: [PATCH] update zh-cn/device-dev/kernel/kernel-small-basic-trans-user-mutex.md. Signed-off-by: Austin --- zh-cn/device-dev/kernel/kernel-small-basic-trans-user-mutex.md | 1 + 1 file changed, 1 insertion(+) diff --git a/zh-cn/device-dev/kernel/kernel-small-basic-trans-user-mutex.md b/zh-cn/device-dev/kernel/kernel-small-basic-trans-user-mutex.md index 73d28d8a97..aeb7870074 100644 --- a/zh-cn/device-dev/kernel/kernel-small-basic-trans-user-mutex.md +++ b/zh-cn/device-dev/kernel/kernel-small-basic-trans-user-mutex.md @@ -19,6 +19,7 @@ Futex(Fast userspace mutex，用户态快速互斥锁)是内核提供的一种 当前哈希桶共有80个，0~63号桶用于存放私有锁（以虚拟地址进行哈希），64~79号桶用于存放共享锁（以物理地址进行哈希），私有/共享属性通过用户态锁的初始化以及Futex系统调用入参确定。 **图1** Futex设计图 + ![zh-cn_image_0000001127535690](figures/zh-cn_image_0000001127535690.jpg) 如图1，每个futex哈希桶中存放被futex_list串联起来的哈希值相同的futex node，每个futex node对应一个被挂起的task，node中key值唯一标识一把用户态锁，具有相同key值的node被queue_list串联起来表示被同一把锁阻塞的task队列。 -- GitLab