21 Mar 2009 lmb   » (Master)

  • So our new test cluster environment is a 16 node HP blade center, which pleases me quite a bit. The blades all have a hardware watchdog card, which of course makes perfect sense for a cluster to use.
  • However, the attempt to set the timeout to 5s was thwarted by the kernel message
    hpwdt: New value passed in is invalid: 5 seconds.
  • So in I dived into hpwdt.c, to find:
    static int hpwdt_change_timer(int new_margin)
    /* Arbitrary, can't find the card's limits */
    if (new_margin < 30 || new_margin > 600) {
    printk(KERN_WARNING "hpwdt: New value passed in is invalid: %d seconds.\n", new_margin);
    return -EINVAL;
  • Okay, that can happen. Sometimes driver writes have to make guesses when the vendor is not cooperative or unavailable. So who wrote the driver?
    * (c) Copyright 2007 Hewlett-Packard Development Company, L.P.
  • ...

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