From: Li Yang <leoli@freescale.com>
To: chen gong <gong.chen@linux.intel.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>, linux-kernel@vger.kernel.org
Subject: Re: nonboot cpu on SMP suspend
Date: Thu, 19 Mar 2009 15:18:27 +0800 [thread overview]
Message-ID: <2a27d3730903190018h1a0f5b6asf5cf2002fe3504fb@mail.gmail.com> (raw)
In-Reply-To: <49C1EE7D.5070507@linux.intel.com>
On Thu, Mar 19, 2009 at 3:04 PM, chen gong <gong.chen@linux.intel.com> wrote:
> Rafael J. Wysocki 写道:
>>
>> On Wednesday 18 March 2009, Li Yang wrote:
>>>
>>> Hi all,
>>>
>>> I'm curious why we need to un-plug all the nonboot cpus before suspend
>>> and start them all over again after the suspend(ACPI sleep)? I mean
>>> if we can bring the booting cpu back to the exact state as before
>>> suspend, why can't we just do the same for non-booting cpus? And that
>>> will be much faster. Any thought? Thanks.
>>
>> Because we need to enter the BIOS with one CPU on-line only.
>>
> You mean only one CPU can be supported by BIOS when suspend/resume ?
If so, is it a defect of x86 BIOS? And is it true that for other
architectures without a BIOS there won't be such a limitation if the
boot code is sane? Thanks
- Leo
next prev parent reply other threads:[~2009-03-19 7:18 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-18 6:25 nonboot cpu on SMP suspend Li Yang
2009-03-18 23:00 ` Rafael J. Wysocki
2009-03-19 7:04 ` chen gong
2009-03-19 7:18 ` Li Yang [this message]
2009-03-19 12:30 ` Rafael J. Wysocki
2009-03-20 18:58 ` Pavel Machek
2009-03-23 7:15 ` Li Yang
2009-03-23 10:38 ` Pavel Machek
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