Date: Mon, 23 Aug 2010 10:53:46 +0000 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Jeremy Chadwick <freebsd@jdc.parodius.com> Cc: freebsd-stable@freebsd.org Subject: Re: Watchdog not being disabled while dumping core Message-ID: <85637.1282560826@critter.freebsd.dk> In-Reply-To: Your message of "Mon, 23 Aug 2010 03:34:12 MST." <20100823103412.GA21044@icarus.home.lan>
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In message <20100823103412.GA21044@icarus.home.lan>, Jeremy Chadwick writes: >It was brought to my attention that on FreeBSD with a hardware watchdog >in use (e.g. ichwd(4) + watchdogd(8)), once the kernel panics, it's >quite possible for the watchdog to fire (reboot the system) once the >panic has happened. This issue basically inhibits the ability for a >system with a hardware watchdog in place to be able to successfully >complete doadump(). The good news is that the watchdog hopefully gets your system back on the air, even if the dumping hangs. If it is decided to reset/disarm the watchdog before a dump, please make that a sysctl tunable. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
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