On Tue, Oct 15, 2013 at 02:18:53PM +0200, Frederic Weisbecker wrote: > On Tue, Oct 15, 2013 at 02:01:04AM +0000, Liu, Chuansheng wrote: > > We meet one issue that during trigger all CPU backtrace, but during in the > > NMI handler arch_trigger_all_cpu_backtrace_handler, > > It hit the PAGE fault, then PAGE fault is in loop, at last the thread stack > > overflow, and system panic. > > > > Anyone can give some help? Thanks. > > Looks like we re-enter the fault several times. On x86-32, NMIs can > fault if they dereference vmalloc'ed area. I wonder if the module thing > we lookup in the NMI is stored on some vmalloc'ed area.
IIRC modules are indeed allocated using vmalloc. See module_alloc() using vmalloc_exec() -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
