On Wed, Jun 13, 2007 at 11:21:53PM -0700, Yong Rao wrote: > Hi Kris, > > Thanks for your reply. > > I have 2 exactly the same equipments. The ONLY difference is the OS. One > is running 6.0 FBSD. The other one is 6.2 FBSD. > > I built the kernels using the same configuration file (with SMP option). > My problem is that the OS 6.2 does not dump core when crash happens, > while the OS 6.0 does core dump perfectly. Why it is like this? > Something wrong with FBSD 6.2 OS when SMP options is enabled?
Impossible to rule it out of course, but this sounds unlikely. Many of us developers perform dumps on SMP 6.2 systems regularly. There were *many* changes between 6.0 and 6.2, and perhaps it is as simple as your workload is exercising a slightly different code path or timing. Using DDB you will be able to determine what the other threads are doing at the time of crash and this should help to figure out why dumping is failing. Kris
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