linux-kernel - Re: Linux 2.6.27-rc5: System boot regression caused by commit a2bd7274b47124d2fc4dfdb8c0591f545ba749dd

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Message-ID: <86802c440808301310v439344a5k2e5a1ce1ed9b0be@mail.gmail.com>
Date:	Sat, 30 Aug 2008 13:10:52 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	"Jeff Garzik" <jeff@...zik.org>, "Tejun Heo" <htejun@...il.com>,
	"Ingo Molnar" <mingo@...e.hu>,
	"David Witbrodt" <dawitbro@...global.net>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Kernel Testers" <kernel-testers@...r.kernel.org>
Subject: Re: Linux 2.6.27-rc5: System boot regression caused by commit a2bd7274b47124d2fc4dfdb8c0591f545ba749dd

On Sat, Aug 30, 2008 at 12:51 PM, Rafael J. Wysocki <rjw@...k.pl> wrote:
> On Saturday, 30 of August 2008, Yinghai Lu wrote:
>> On Sat, Aug 30, 2008 at 11:11 AM, Yinghai Lu <yhlu.kernel@...il.com> wrote:
>> > On Sat, Aug 30, 2008 at 10:55 AM, Yinghai Lu <yhlu.kernel@...il.com> wrote:
>> >> On Sat, Aug 30, 2008 at 10:14 AM, Rafael J. Wysocki <rjw@...k.pl> wrote:
>> >>
>> >>>
>> >>> Could you please rebase them on top of current -git?
>> >>
>> >> please check attached quilt series based on linus tree.
>> >
>> > there is some problem with fix -v4...on one test machine.
>> >
>>
>> this one should work.
>
> dmesg -s 262144
>
> http://www.sisk.pl/kernel/debug/mainline/2.6.27-rc5/dmesg-test.log
>
> cat /proc/iomem
>
> http://www.sisk.pl/kernel/debug/mainline/2.6.27-rc5/iomem-test.txt

calling  pci_subsys_init+0x0/0x120
PCI: Using ACPI for IRQ routing
request_resource: root: (PCI IO) [0, ffff], new: (PCI Bus 0000:01)
[9000, 9fff] conflict 0
request_resource: root: (PCI mem) [0, ffffffffffffffff], new: (PCI Bus
0000:01) [fe700000, fe7fffff] conflict 0
request_resource: root: (PCI mem) [0, ffffffffffffffff], new: (PCI Bus
0000:01) [d8000000, dfffffff] conflict 0
request_resource: root: (PCI IO) [0, ffff], new: (PCI Bus 0000:02)
[a000, bfff] conflict 0
request_resource: root: (PCI mem) [0, ffffffffffffffff], new: (PCI Bus
0000:02) [fe800000, fe8fffff] conflict 0
request_resource: root: (PCI IO) [0, ffff], new: (PCI Bus 0000:03)
[c000, cfff] conflict 0
request_resource: root: (PCI mem) [0, ffffffffffffffff], new: (PCI Bus
0000:03) [fe900000, fe9fffff] conflict 0
request_resource: root: (PCI IO) [0, ffff], new: (PCI Bus 0000:04)
[d000, efff] conflict 0
request_resource: root: (PCI mem) [0, ffffffffffffffff], new: (PCI Bus
0000:04) [fea00000, feafffff] conflict 0
request_resource: root: (PCI mem) [0, ffffffffffffffff], new: (PCI Bus
0000:05) [feb00000, febfffff] conflict 0
request_resource: root: (PCI mem) [0, ffffffffffffffff], new:
(0000:00:00.0) [e0000000, ffffffff] conflict 1
pci 0000:00:00.0: BAR 3: can't allocate resource

so pci_resource_survey is depth first. sub buses request some resource
at first...

we don't need quirk to handle that strange BAR res.

and we got reserved register correctly
in /proc/iomem
d7fe0000-d7ffffff : reserved
..
fff00000-ffffffff : reserved

for
 BIOS-e820: 00000000d7fe0000 - 00000000d8000000 (reserved)
 BIOS-e820: 00000000fff00000 - 0000000100000000 (reserved)

YH
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