On Wed, 2013-10-02 at 03:10 +0000, Chen Gang wrote: > Hello Maintainers: > > Under my x86_64 dual core laptop, I build kernel next-20130927 with > 'allmodconfig', and install it, the machine can not start. Related > information is: > > after call debug_hotplug_cpu(), output "cpu 0 is offline" .... and then > "Failed to execute /init". > > After remove "_debug_hotplug_cpu(0, 0);", can pass the issue (but will > fail in another place). I guess, the reason is my laptop cpu is not > 'hotplug', but have to call debug_hotplug_cpu() with allmodconfig. > > > I will continue analyzing, welcome any additional suggestions or > completions.
allmodconfig sets CONFIG_DEBUG_HOTPLUG_CPU0 to y (which is defined as "def_bool n"), which puts CPU0 offline during boot for testing. This debug feature is causing the problem on your laptop. I am not familiar with allmodconfig, but it seems that it enables all the config options, preferably with 'm'. Thanks, -Toshi -- 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/
