Neha, Are you trying to get coredump on virtual box and added extra virtual CPU to that guest virtual machine ? -Vivek On Sat, Aug 3, 2013 at 10:48 AM, anish singh <anish198519851985@xxxxxxxxx> wrote: > > On Aug 3, 2013 3:02 AM, "neha naik" <nehanaik27@xxxxxxxxx> wrote: >> >> Hi All, >> I looked into my issue and i had only one cpu on that machine and i was >> getting messages like process # waiting for # secs. >> My theory is that this process was of doing some kind of busy looping on >> that cpu so that the operating system could >> not even generate a dump. >> The moment i increased the number of cpus i got the dump. I am just >> posting this > How did you do that?How can you limit the number of cpus?I wonder if there > is some sysfs control for that? > > because someone else may find it useful. >> >> Regards, >> Neha >> >> On Thu, May 30, 2013 at 11:44 AM, <Valdis.Kletnieks@xxxxxx> wrote: >>> >>> On Thu, 30 May 2013 11:31:49 -0600, neha naik said: >>> >>> > I have loaded the linux crashdump on ubuntu machine. I can manually >>> > generate the crashdump by the 'echo c > /proc/sysrq-trigger'. >>> > However, i am having a panic in a module i have written, which is not >>> > generating a core dump. I simply see the stack in the console and it >>> > kind of >>> > hangs there. I have to manually power it off and power it on ... >>> > Can someone explain why this happens? Is it because the kernel has >>> > gone >>> > into such a state that it cannot even follow the procedure for >>> > crash dump. >>> >>> Most likely, your module isn't in fact panic'ing, but oops'ing. >>> There's a number of kernel variables that control whether to panic. >>> >>> ls -l /proc/sys/kernel/*panic* >>> >>> and for example 'echo 1 > /proc/sys/kernel/panic_on_oops' will cause >>> a panic if something oops'es. >> >> >> >> _______________________________________________ >> Kernelnewbies mailing list >> Kernelnewbies@xxxxxxxxxxxxxxxxx >> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies >> > > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@xxxxxxxxxxxxxxxxx > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
