Andi Kleen wrote:
On Mon, Aug 11, 2008 at 10:27:31PM +0200, Ingo Molnar wrote:
* Maciej Rutecki <maciej.rutecki@xxxxxxxxx> wrote:
A have problem with booting 2.6.26* and 2.6.27-rc* kernels. Very often
booting stops on this message:
[...]
Uniform Multi-Platform E-IDE driver
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
ICH7: IDE controller (0x8086:0x27df rev 0x01) at PCI slot 0000:00:1f.1
ACPI: PCI Interrupt 0000:00:1f.1[A] -> GSI 16 (level, low) -> IRQ 16
ICH7: not 100% native mode: will probe irqs later
ICH7: IDE port disabled
ide0: BM-DMA at 0x60a0-0x60a7
afer should be:
hda: MATSHITADVD-RAM UJ-840S, ATAPI CD/DVD-ROM drive
hda: host max PIO4 wanted PIO255(auto-tune) selected PIO4
hda: MWDMA2 mode selected
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
[...]
Initially I was think, that is hardware problem. But XP and 2.6.25.8
work with _no_ problem (booting from xp, linux, knoppix, linux
firmware development kit - about 50 reboots).
http://unixy.pl/maciek/download/kernel/dupa/dmesg-2.6.26.2.txt
dmesg: http://unixy.pl/maciek/download/kernel/dupa/dmesg-2.6.25.8.txt
i had a look at diff -up dmesg-2.6.25.8.txt dmesg-2.6.26.2.txt, and
these changes stood out:
Yes post 2.6.25 changed to trust the ACPI motherboard resources
to signify working mmcfg, previously it would use the e820 table
which excluded near all motherboards which were not white listed
by PCI-ID because BIOS programmers were generally not aware
they had to reserve mcfg in e820.
You can verify this by booting with pci=nommconf. If it works
then it's likely that.
The new heuristic is apparently the same as what Vista does.
Robert Hancock (cc'ed, fullquote) is mr. mmconfig quirk.
-Andi
Wouldn't hurt to try it, but I'm kind of doubtful it's that - MMCONFIG
failures don't normally get that far into bootup, and I believe we're
not using it for non-extended config space anyways - I doubt IDE is
doing extended config space access..
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