On Sat, 2004-04-17 at 00:23, Huw Lynes wrote: > On Fri, 16 Apr 2004 12:05:18 -0400 > Martin Stone <martin.stone@xxxxxx> wrote: > > > > > The reason I'm trying to do this is that with FC1 stock kernels I am getting > > > > random kernel *freezes* - not panics or even oopses - on multiple machines > > even when trying the usual frequently recommended "apm=off acpi=off nohlt" > > recommended incantations. It's my hope that some kind of bugfix has been > > applied somewhere along the line that would address this problem, as I can't > > seem to debug it. > > Oh good it's not just us then. What sort of boxes are they? We've begun to see > this mostly on dual-xeon machines. Try setting up a serial console or netdump, and adding the kernel parameter nmi_watchdog=1 to your grub.conf. After booting, check /proc/interrupts to make sure the NMI: count is increasing (if it isn't, try nmi_watchdog=2) This isn't supported on all hardware, but if NMI is increasing, then should NMI stop increasing for 5 seconds the kernel will generate a panic. It should be possible to determine where the kernel got hung from that output. -- Chris Kloiber
