Re: linux-3.9-rc0 regression from 3.8 SATA controller not detected under xen

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

On Mon, Feb 25, 2013 at 11:18:30PM +0100, Sander Eikelenboom wrote:
> Hi Konrad,
> 
> I can't get linux-3.9 rc0 to boot under xen-unstable.
> It doesn't detect the s-ata controller, so it ends op with udev timing and bailing out to busybox.
> 
> I don't see a obvious error in the logs.
> 
> The same kernel boots fine on baremetal.
> With linux 3.8 it boots fine under this version of xen-unstable.
> 
> Can you spot something from the logs or you have a hunch from where to start a bisect ?
> (bisecting could be a problem due to multiple boot issues and entangled patchsets i presume ..)

There are at least two pitfalls - the
14e568e78f6f80ca1e27256641ddf524c7dbdc51 (which you can revert) and you need
to make sure you have 0cc9129d75ef8993702d97ab0e49542c15ac6ab9
if you end up in the merge 2ef14f465b9e096531343f5b734cffc5f759f4a6
("Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip")


> 
> 3.9-rc0 last commit is: ab7826595e9ec51a51f622c5fc91e2f59440481a   Merge tag 'mfd-3.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6

Interestingly I can reproduce it on my F1A75-M box as well.

With baremetal I get:
[   12.701221] ahci 0000:00:11.0: version 3.0
[   12.701424] initcall radeon_init+0x0/0x1000 [radeon] returned 0 after 528175 usecs
[   12.712999] ahci 0000:00:11.0: irq 46 for MSI/MSI-X
[   12.717967] ahci 0000:00:11.0: AHCI 0001.0300 32 slots 6 ports 6 Gbps 0x3f impl SATA mode
[   12.726132] ahci 0000:00:11.0: flags: 64bit ncq sntf ilck pm led clo pmp pio slum part
[   12.735405] scsi0 : ahci
[   12.738087] scsi1 : ahci
[   12.740734] scsi2 : ahci
[   12.743511] scsi3 : ahci
[   12.746278] scsi4 : ahci
[   12.748930] scsi5 : ahci

And when booting under Xen 4.1 (note, no IOMMU):

[   19.178696] ahci 0000:00:11.0: version 3.0
[   19.178721] xen: registering gsi 19 triggering 0 polarity 1
[   19.178743] xen: --> pirq=19 -> irq=19 (gsi=19)
[   19.179040] ahci 0000:00:11.0: AHCI 0001.0300 32 slots 6 ports 6 Gbps 0x3f impl SATA mode
[   19.179043] ahci 0000:00:11.0: flags: 64bit ncq sntf ilck pm led clo pmp pio slum part
[   19.241748] ahci: probe of 0000:00:11.0 failed with error -22
[   19.249124] initcall ahci_pci_driver_init+0x0/0x1000 [ahci] returned 0 after 460418 usecs

Had you tried to checkout right before this mega update from Jeff Garzik:

ab78265 Merge tag 'mfd-3.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6
21fbd58 Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
d9978ec Merge tag 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev
==> 77be36d Merge tag 'stable/for-linus-3.9-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen

And seeing if that works?
> 
> --
> Sander
> 
> Attached:
> - Serial log with 3.9-rc0 kernel (missing sata)
> - Serial log with 3.8 kernel (booting fine
> - .config