Re: Runaway loop with the current git.

From: Kay Sievers
Date: Fri Dec 05 2008 - 21:10:45 EST

On Fri, Dec 5, 2008 at 22:24, Evgeniy Polyakov <zbr@xxxxxxxxxxx> wrote:
> On Fri, Dec 05, 2008 at 10:17:01PM +0100, Kay Sievers (kay.sievers@xxxxxxxx) wrote:
>> > And what's with tty drivers? If kernel freezes there even if suddenly
>> > faulty userspace started to load them, where this can happen? Apparently
>> > it is not sleeping userspace since console does not respond to input.
>> 5-1 dev_t request looks like something in initramfs accesses
>> /dev/console, but the driver for it is not properly
>> initialized/registered that time, and the kernel module loader tries
>> to load a module? The forked process might also try to access
>> /dev/console again, and hence the loop?
> But why system freezes? Is this init linking/__init calling order
> changes?

Can you add something like:
+++ b/kernel/kmod.c
@@ -108,6 +108,7 @@ int request_module(const char *fmt, ...)
return -ENOMEM;

+ printk("XXX call modprobe %s %s[%u]\n", module_name,
current->comm, task_pid_nr(current));

It may show which process is looking for /dev/console and causes
modprobe to run, and maybe we get an idea what's going on. It may at
least show if it's a /dev/console problem.

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