Justin P. Mattock wrote:
> On Tue, 2008-11-18 at 11:15 +0000, Alan Jenkins wrote:
>
>> On 11/18/08, Justin P. Mattock <justinmattock@xxxxxxxxx> wrote:
>>
>>> in dmesg I see:
>>> [ 11.333737]
>>> but nothing else.
>>> ---------------(cut)-----------------
>>> [ 11.247147] Monitor-Mwait will be used to enter C-1 state
>>> [ 11.247151] Monitor-Mwait will be used to enter C-2 state
>>> [ 11.247154] Monitor-Mwait will be used to enter C-3 state
>>> [ 11.247671] ACPI: CPU0 (power states: C1[C1] C2[C2] C3[C3])
>>> [ 11.247996] processor ACPI_CPU:00: registered as cooling_device0
>>> [ 11.248008] ACPI: Processor [CPU0] (supports 8 throttling states)
>>> [ 11.306465] ACPI: SSDT 3FEB8F10, 0087 (r1 APPLE Cpu1Ist 3000
>>> INTL 20050309)<7>power_supply ADP1: No power supply yet
>>>
>> Look at this last line. The "<7>" is a priority marker. Normally it
>> marks the start of a line, and should be hidden. So you seem to be
>> missing a line break just after "20050309)"...
>>
>>
>>> [ 11.306831] power_supply ADP1: power_supply_changed
>>> [ 11.306839] ACPI: AC Adapter [ADP1] (on-line)
>>> [ 11.333737] <------------what's with this!!!
>>>
>> ...which seems to be delayed and reappears here?
>>
>>
>>> [ 11.342937] power_supply ADP1: power_supply_changed_work
>>> [ 11.351901] power_supply ADP1: power_supply_update_gen_leds 1
>>> [ 11.351916] ACPI: SSDT 3FEB7F10, 0085 (r1 APPLE Cpu1Cst 3000
>>> INTL 20050309)
>>>
>>> if you need to see the full dmesg I can attach..
>>> I've seen this happen on a random.
>>>
>> I guess you have a multicore processor (or some other sort of SMP), right?
>>
>> I think kernel messages are not completely synchronized by design, for
>> reliability reasons. (e.g. to make sure critical error messages /
>> backtraces can get through on a dying system).
>>
>
>
> Cool.
> makes good sense to me,
> As long as it's not something that shouldn't be there,
> or something that's broken. As for this happening again
> looking at dmesg nothing, all synchronized.
> Seems to randomly show itself.
>
It's the ACPICA OS abstraction layer - it splits every message into
multiple printk() calls. Other subsystems don't do this... it probably
could and should be fixed.
drivers/acpi/utmisc.c:
void ACPI_INTERNAL_VAR_XFACE
acpi_ut_info(const char *module_name, u32 line_number, const char
*format, ...)
{
va_list args;
/*
* Removed module_name, line_number, and acpica version, not needed
* for info output
*/
acpi_os_printf("ACPI: ");
va_start(args, format);
acpi_os_vprintf(format, args);
acpi_os_printf("\n");
va_end(args);
}
The alternative is to use the preprocessor, i.e. macros and string
concatenation to generate a single printk().
Alan
--
To unsubscribe from this list: send the line "unsubscribe linux-acpi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
