On 04/20/2016 12:10 AM, fixed-term.Oleksij.Rempel wrote:
Hallo all, my target is to provide pretimout support for devices which do not have this functionality. Pre-requirement is this patchset (i contacted the author to rebase it against latest watchdog core branch): https://www.mail-archive.com/linux-watchdog@xxxxxxxxxxxxxxx/msg02394.html The idea is to use different watchdogs/timers or what ever as one group - one virtual device. One driver will be responsible for reseting the system, other for generating an interrupt on pre-timout. It can be also useful for systems which require redundant watchdogs - two or more watchdog pinged over one /dev/watchdog I assume i would need to create a master virtual watchdog driver to bypass/broadcast all pings to child devices. Do you have some ideas or suggestions?
Seems to add a lot of complexity. It might be much simpler to add support for a 'soft' pretimeout in such situations, ie a timer which fires at the correct interval and results in a reset. It might even be possible to use the new internal heartbeat function for this purpose. Guenter -- To unsubscribe from this list: send the line "unsubscribe linux-watchdog" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
