linux-kernel - Re: [Bug 41722] Clevo M5X0JE hangs in ACPI init

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Date:	Fri, 13 Jan 2012 09:29:31 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Rogério Brito <rbrito@....usp.br>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	Edward Donovan <edward.donovan@...ble.net>,
	Thomas Gleixner <tglx@...utronix.de>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	linux-kernel@...r.kernel.org,
	Márcia Coutinho de Brito <mcbrito@...il.com>,
	Ram Pai <linuxram@...ibm.com>
Subject: Re: [Bug 41722] Clevo M5X0JE hangs in ACPI init

On Fri, Jan 13, 2012 at 3:59 AM, Rogério Brito <rbrito@....usp.br> wrote:
> Dear Yinghai,
>
> On Jan 11 2012, Yinghai Lu wrote:
>> On Tue, Jan 10, 2012 at 11:04 PM, Rogério Brito <rbrito@....usp.br> wrote:
>> > On Tue, Jan 10, 2012 at 03:07, Yinghai Lu <yinghai@...nel.org> wrote:
>> >>   git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git
>> >> for-pci2
>> >>
>> >> also please boot with "debug ignore_loglevel"
>> >
>> > Grabbing it right now. Will report it after I get some sleep (5AM here).
>>
>> please try attached patch, it will fix one bios wrong setting.
>
> Should I use this patch agains which tree?
>
> Right now, I have Linus's tree, yours (cited above) and I am, up to now,
> I had been compiling everything from Linus's v3.2 tag: both a vanilla
> kernel, as asked by Bjorn and with the patch that I mentioned to Linus ("the
> one that makes things boot").
>
> If it applies (and newer kernels don't have things which your patch needs),
> I will keep working with Linus's v3.2 tag.

No problem, I will put that patch into for-pci2 for your conveniences.

>
> When I compiled from your branch for-pci2 from linux-yinghai.git (without
> any extra patches), it *did* boot, but noticed one thing weird: using htop
> and in single user mode, it reported 100% of CPU in use. With regular top, a
> more fine grained output revealed that no processes were using the CPU, but
> that almost all of the time was spent in kernel mode.
>
> Anyway, as you asked, I put the log of what I see at
>
>    http://www.ime.usp.br/~rbrito/linux/clevo/2012-01-13-0951-yanghai-for-pci2-branch/

[    0.165615] pci 0000:05:07.0: CardBus bridge to [bus 06-09]
[    0.165682] pci 0000:05:07.0:   bridge window [io  0x0001-0x0000]
[    0.165751] pci 0000:05:07.0:   bridge window [io  0x0001-0x0000]
[    0.165821] pci 0000:05:07.0:   bridge window [mem
0x00000001-0x00000000 pref]
[    0.165904] pci 0000:05:07.0:   bridge window [mem 0x00000001-0x00000000]
[    0.165975] pci 0000:00:10.0: PCI bridge to [bus 05-06]
[    0.166043] pci 0000:00:10.0:   bridge window [mem 0xb3200000-0xb32fffff]
[    0.166259] pci 0000:00:10.0: setting latency timer to 64
[    0.166329] pci 0000:05:07.0: device not available (can't reserve
[io  0x0001-0x0000])
[    0.166412] pci 0000:05:07.0: Error enabling bridge (-22), continuing

We have some problems with handling cardbus bridge as optional resources.

will produce some patches and update for-pci2 branch for your test.

Thanks

Yinghai
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