On Sun, Oct 6, 2013 at 11:01 PM, Toralf Förster <[email protected]> wrote:
>> Hmm, now pages_dirtied is zero, according to the backtrace, but the BUG_ON()
>> asserts its strict positive?!?
>>
>> Can you please try the following instead of the BUG_ON():
>>
>> if (pause < 0) {
>> printk("pages_dirtied = %lu\n", pages_dirtied);
>> printk("task_ratelimit = %lu\n", task_ratelimit);
>> printk("pause = %ld\n", pause);
>> }
>>
>> Gr{oetje,eeting}s,
>>
>> Geert
> I tried it in different ways already - I'm completely unsuccessful in getting
> any printk output.
> As soon as the issue happens I do have a
>
> BUG: soft lockup - CPU#0 stuck for 22s! [trinity-child0:1521]
>
> at stderr of the UML and then no further input is accepted. With uml_mconsole
> I'm however able
> to run very basic commands like a crash dump, sysrq ond so on.
You may get an idea of the magnitude of pages_dirtied by using a chain of
BUG_ON()s, like:
BUG_ON(pages_dirtied > 2000000000);
BUG_ON(pages_dirtied > 1000000000);
BUG_ON(pages_dirtied > 100000000);
BUG_ON(pages_dirtied > 10000000);
BUG_ON(pages_dirtied > 1000000);
Probably 1 million is already too much for normal operation?
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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