diff --git a/en/device-dev/kernel/kernel-small-overview.md b/en/device-dev/kernel/kernel-small-overview.md index 487282bb8d94453f5135596f2df393f91dbb2ae6..5adf36020583f4681f3b1c05d204848214ebb71d 100644 --- a/en/device-dev/kernel/kernel-small-overview.md +++ b/en/device-dev/kernel/kernel-small-overview.md @@ -2,9 +2,9 @@ -## Overview +## Overview -The OpenHarmony lightweight kernel is a next-generation kernel that evolved from the kernel of Huawei LiteOS, a lightweight IoT operating system. The kernel comes with two patterns: LiteOS-M and LiteOS-A. The LiteOS-M kernel is designed for the mini system, which supports KB-level MCU memory and MPU isolation. Typical counterparts in the industry include FreeRTOS and ThreadX. The LiteOS-A kernel is ideal for the small system, which supports MB-level memory and MMU isolation. Equivalent kernels include Zircon and Darwin. +The OpenHarmony lightweight kernel is a next-generation kernel that evolved from the kernel of Huawei LiteOS, a lightweight IoT operating system. The kernel comes with two patterns: LiteOS-M and LiteOS-A. The LiteOS-M kernel is designed for the mini system, which supports a Microcontroller Unit (MCU), memory of kilobytes, and Memory Protection Unit (MPU) isolation. Typical counterparts in the industry include FreeRTOS and ThreadX. The LiteOS-A kernel is ideal for the small system, which supports memory of megabytes and Memory Management Unit (MMU) isolation. Equivalent kernels include Zircon and Darwin. >![](../public_sys-resources/icon-note.gif) **NOTE:** >OpenHarmony provides different kernels for different systems. The small system supports LiteOS and Linux. This document applies to the LiteOS-A kernel. For details about operations related to the Linux kernel, see [Linux Kernel Overview](kernel-standard-overview.md).