Hi, Yes. I was trying to get coredump on virtual box and added extra virtual CPU to the guest virtual machine.
Regards, Neha On Mon, Aug 5, 2013 at 12:44 PM, Vivek Satpute <[email protected]>wrote: > 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 > <[email protected]> wrote: > > > > On Aug 3, 2013 3:02 AM, "neha naik" <[email protected]> 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, <[email protected]> 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 > >> [email protected] > >> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > >> > > > > > > _______________________________________________ > > Kernelnewbies mailing list > > [email protected] > > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > > >
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