Hi Nilesh. Using reply all this time... On Thu, Jan 6, 2011 at 10:27 PM, Tayade, Nilesh <Nilesh.Tayade@xxxxxxxxxxxx> wrote: ...snip... >> You shouldn't be holding a spinlock for periods of time approaching >> the length of a timeslice. The timer interrupt is what determines the >> end of a timeslice. No timer interrupt, no end of a timeslice. >> Preemption is also triggered by the timer interrupt, or by releasing a >> resource that a higher priority task is waiting for. > > May be my understanding is incorrect, but wouldn't we hit the NMI watchdog here(assuming we are running on x86/x86_64)? > We have a system lockup for long time. > http://lxr.linux.no/#linux+v2.6.37/Documentation/nmi_watchdog.txt > > Could someone please clarify? Did you enable it by passing in nmi_watchdog=1 on the kernel command line? (and verify that it was working fine - as described in the nmi__watchdog.txt file) Dave Hylands _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
