Date: Thu, 14 Nov 2019 16:24:06 +0100 From: Miroslav Lachman <000.fbsd@quip.cz> To: Daniel Braniss <danny@cs.huji.ac.il>, freebsd-hackers <freebsd-hackers@freebsd.org> Subject: Re: can the hardware watchdog reboot a hung kernel? Message-ID: <e601ad2b-dae4-0323-7204-35ae4f0d4d1f@quip.cz> In-Reply-To: <EC4DB495-55D0-44BB-8D6A-0301785FADC7@cs.huji.ac.il> References: <EC4DB495-55D0-44BB-8D6A-0301785FADC7@cs.huji.ac.il>
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Daniel Braniss wrote on 2019/11/14 15:52: > hi, > I have serveral hundred Nano-pi NEO running, and sometimes they hang, since there is no console > available, the only solution is to do a power cycle - not so easy since they are distributed in three buildings :-) > > I am looking at the watchdog stuff, but it seems that what I want is not supported, i.e. > reboot the kernel when hung > > wishful thinking? There is watchdog and watchdogd in base. I never tried it but there are some solutions which need support in BIOS / board where watchdog is communicating with HW and if OS freezes, HW don't get reply from OS and issue reboot after timeout. I don't know if Nano-pi has this support or not. Miroslav Lachman
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