Date: Fri, 14 May 2010 09:30:03 +0500 From: rihad <rihad@mail.ru> To: Doug Ambrisko <ambrisko@ambrisko.com> Cc: freebsd-stable@FreeBSD.org Subject: Re: Enabling watchdog Message-ID: <4BECD1CB.9060902@mail.ru> In-Reply-To: <201005132313.o4DNDBrp078232@ambrisko.com> References: <201005132313.o4DNDBrp078232@ambrisko.com>
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On 05/14/2010 04:13 AM, Doug Ambrisko wrote: > rihad writes: > | Hi, I'm thinking of enabling the watchdog on our Dell PowerEdge 2950 / > | FreeBSD 8.0 amd64, so that it reboots the machine in case of lockups. > | Right now it doesn't work: > | > | # watchdog > | watchdog: patting the dog: Operation not supported > | # > | Looking through the kernel configuration I found two relevant settings: > | In /sys/conf/NOTES: > | # > | # Add software watchdog routines. > | # > | options SW_WATCHDOG > | > | and in /sys/amd64/conf/NOTES: > | # > | # Watchdog routines. > | # > | options MP_WATCHDOG > | > | Which of them should I rebuild the kernel with? BTW, the existing kernel > | is built with the default "options SCHED_ULE" to make good use of > | multiple CPUs, does watchdog work with it? > > If no one has said yet, kldload ipmi then run watchdogd. ... or compile > it into the kernel. This will enable the IPMI HW watchdog. If it triggers, > it will appear in the IPMI SEL (ipmitool sel list). > Thanks. So did I understand it right that I should first install sysutils/ipmitool, then start polling "ipmitool sel list" in a shell script from a cron job run once a minute, and reboot in case IPMI triggers? But if it's a kernel lockup, none of the user level code might run at all. Any way to fall back to a hard and fast kernel level machine reset?
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