Re: regression in 2.6.23-rc8 - power off failed

From: Bill Davidsen
Date: Sat Sep 29 2007 - 16:41:45 EST

Alexey Starikovskiy wrote:

-static void
-acpi_power_off (void)
- printk("%s called\n",__FUNCTION__);
- /* Some SMP machines only can poweroff in boot CPU */
- set_cpus_allowed(current, cpumask_of_cpu(0));
ACPI in kernel 2.6.12 did disable non-boot cpus too in powe_off.
Later only comment was left for some reason...

Am I midreading that code, or does it really assume that the boot cpu is always zero? Or just that zero will be able to do the power off?

In any case I have had an SMP machine which did not have a CPU zero, and it was discussed here, I believe. Wonder what happens if you set affinity to a CPU you don't have...

Bill Davidsen <davidsen@xxxxxxx>
"We have more to fear from the bungling of the incompetent than from
the machinations of the wicked." - from Slashdot
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