Re: [Xen-devel] linux-3.9-rc0 regression from 3.8 SATA controller not detected under xen

[Sander Eikelenboom <linux@xxxxxxxxxxxxxx>]

Tuesday, February 26, 2013, 4:20:38 PM, you wrote:

> 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?

Ok reverting to just before the libata merge doesn't help. Time to start 
digging further back ...


>> 
>> --
>> Sander
>> 
>> Attached:
>> - Serial log with 3.9-rc0 kernel (missing sata)
>> - Serial log with 3.8 kernel (booting fine
>> - .config







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