is /dev/watchdog\n"); printf(" -i, --info\t\tShow watchdog_info\n"); printf(" -s, --status\t\tGet status & supported features\n"); printf(" -b, --bootstatus\tGet last boot status (Watchdog/POR)\n"); printf(" -d, --disable\t\tTurn off the watchdog timer\n"); ...
structwatchdog_ops {structmodule *owner;/*mandatory operations*/int(*start)(structwatchdog_device *);int(*stop)(structwatchdog_device *);/*optional operations*/int(*ping)(structwatchdog_device *);--喂狗。unsignedint(*status)(structwatchdog_device *);int(*set_timeout)(structwatchdog_device...
printf("The timeout was is %d seconds\n", timeout); 预处理: Pretimeouts: 一些watchdog定时器,可以被设置为,在他们实际复位系统前,有一个触发。这可能通过一个NMI,中断,或其他机制。这将允许在它复位系统前Linux去记录一些有用的信息(比如panic信息和内核转储)。 pretimeout = 10; ioctl(fd, WDIOC_SET...
watchdogd(8)is an advanced system and process supervisor daemon, primarily intended for embedded Linux and server systems. By default it periodically kicks the system watchdog timer (WDT) to prevent it from resetting the system. In its more advanced guise it monitors critical system resources, ...
Linux的WDT(watchdog)驱动 第一部分: WDT驱动原理 WDT在内核中通常都实现为misc驱动。 WDT介绍 一个Watchdog Timer(WDT)是一个在软件出错的时候可以复位计算机系统的硬件电路。 通常一个用户空间守护进程会在正常的时间间隔内通过/dev/watchdog特殊设备文件来通知内核的watchdog驱动,用户空间仍然正常。当这样的一个...
一个Watchdog Timer(WDT)是一个在软件出错的时候可以复位计算机系统的硬件电路。 通常一个用户空间守护进程会在正常的时间间隔内通过/dev/watchdog特殊设备文件来通知内核的watchdog驱动,用户空间仍然正常。当这样的一个通知发生时,驱动通常会告诉硬件watchdog一切正常,然后watchdog应该再等待一段时间来复位系统。如果用户...
Set to 0 for 'unlimited', but note that the hardware timer is not refreshed in this case so the system will hard- reset at some point. retry-timeout = Allow most error conditions to persist for seconds. Set to 0 for immediate action (like softboot behaviour). repair-maximum = <...
* Stopable timer: Yes No * Need to enable clk: No Yes * Halt on suspend: Manual Can be automatic */ #include <linux/clk.h>#include <linux/delay.h>#include <linux/init.h>#include <linux/interrupt.h>#include <linux/io.h>#include <linux/kernel.h>#include <linux/modul...
circuit; and a watchdog timer, which is cleared whenever the processor executes a ping-related command for transmission or reception of ping messages to or from the power receiving device, wherein an overflow period of the watchdog timer is set to be longer than a period for the ping ...
When the ping fails, the file is untouched Setup watchdog.conf to watch that file and react if it wasn't updated for 30 minutes Added a repair script that returns 1 (reboot) by default, but also manages a false alarm thrown by watchdog when system date has changed. Watchdog looks if...