On Thu, 2020-09-03 at 13:13 +0200, Christophe Leroy wrote: > You want to start the watchdog just before calling 'reboot' but want to > make sure that the watchdog will not reset the board before all > userspace has shut down correctly ? Yes, just for an example, in the nature exists some aspeed2400/2500 board which has 2 watchdog devices and 2 spi flash memories. By default it starts from 1 spi flash. When watchdog triggers, on next boot, it's automatically starts from 2 flash, also you can manually switch from 1 spi flash to 2 with 2 watchdog device by trigger of it, like transparent reload from 1 spi flash side to 2. > But what is the purpose of the watchdog then, isn't it there to make > sure that the machine gets reboot within a given timeout anyway in case > some userspace takes too long to shut down ? Usually, yes. Thanks.
