From: Bill Davidsen <davidsen@tmr.com>
To: Alexey Starikovskiy <astarikovskiy@suse.de>
Cc: Mark Lord <lkml@rtr.ca>, "H. Peter Anvin" <hpa@zytor.com>,
linux-kernel@vger.kernel.org
Subject: Re: regression in 2.6.23-rc8 - power off failed
Date: Sat, 29 Sep 2007 16:47:06 -0400 [thread overview]
Message-ID: <46FEB9CA.9090703@tmr.com> (raw)
In-Reply-To: <46FE6E17.6070109@suse.de>
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@tmr.com>
"We have more to fear from the bungling of the incompetent than from
the machinations of the wicked." - from Slashdot
next prev parent reply other threads:[~2007-09-29 20:41 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-29 0:54 regression in 2.6.23-rc8 - power off failed Wolfgang Erig
2007-09-29 2:59 ` Frans Pop
2007-09-29 3:29 ` Frans Pop
2007-09-29 3:05 ` H. Peter Anvin
2007-09-29 8:22 ` Wolfgang Erig
2007-09-29 8:30 ` H. Peter Anvin
2007-09-29 9:35 ` Wolfgang Erig
2007-09-29 12:40 ` Mark Lord
2007-09-29 15:24 ` Alexey Starikovskiy
2007-09-29 20:47 ` Bill Davidsen [this message]
2007-09-29 21:08 ` Rafael J. Wysocki
2007-10-01 17:55 ` Alexey Starikovskiy
2007-10-01 20:30 ` Rafael J. Wysocki
2007-09-29 18:07 ` Wolfgang Erig
2007-09-29 19:45 ` Wolfgang Erig
2007-09-29 22:39 ` H. Peter Anvin
2007-10-08 19:47 ` regression in 2.6.23-rc8 - power off failed: solved Wolfgang Erig
2007-09-29 7:46 ` regression in 2.6.23-rc8 - power off failed Alexey Starikovskiy
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