Re: [Xen-devel] Re: [Patch RFC] ttm: nouveau accelerated on Xen pv-ops kernel

[Michael D Labriola <mlabriol@xxxxxxxx>]

xen-devel-bounces@xxxxxxxxxxxxxxxxxxx wrote on 03/15/2010 07:13:20 PM:

> On 03/15/2010 07:44 AM, Michael D Labriola wrote:
> > Hmm... I just verified that this patch fixes KMS/Nouveau issues in Xen 
on
> > my two primary test boxes (GeForce 6200, GeForce 7300).  However, on 
my
> > really old machines (AGP GeForce2 MX200), this causes a new crash. 
These
> > old boxes were actually working fine in Xen prior to this patch, just
> > w/out 3d acceleration.  Now I get the following messages in dmesg:
> >
> > [  129.637319] [drm] nouveau 0000:01:00.0: Allocating FIFO number 1
> > [  129.638853] [drm] nouveau 0000:01:00.0: nouveau_channel_alloc:
> > initialised FIFO 1
> > [  129.643791] X: Corrupted page table at address 40412000
> > [  129.643815] *pdpt = 0000000015216001 *pde = 0000000000000000
> > [  129.643856] Bad pagetable: 000f [#1] SMP
> > [  129.643897] last sysfs file:
> > /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/boot_vga
> > [  129.643916] Modules linked in: bridge stp ipv6 autofs4 sunrpc raid1
> > video output sbs sbshc pci_slot lp sg nouveau snd_intel8x0 
snd_ac97_codec
> > ac97_bus snd_seq_dummy he atm ttm drm_kms_helper snd_seq_oss
> > snd_seq_midi_event sr_mod snd_seq cdrom drm serio_raw snd_seq_device
> > snd_pcm_oss snd_mixer_oss snd_pcm e100 mii i2c_algo_bit snd_timer
> > ata_generic snd pcspkr i2c_i801 i2c_core intel_rng soundcore 
i82860_edac
> > snd_page_alloc pata_acpi edac_core parport_pc floppy parport 
dm_snapshot
> > dm_zero dm_mirror dm_region_hash dm_log dm_mod raid0 ext3 mbcache jbd
> > aic7xxx scsi_transport_spi ata_piix libata sd_mod scsi_mod
> > [  129.644024]
> > [  129.644024] Pid: 3690, comm: X Not tainted (2.6.31.6-mdl5 #1) P4DC6
> > [  129.644024] EIP: 0073:[<40394596>] EFLAGS: 00210206 CPU: 0
> > [  129.644024] EIP is at 0x40394596
> > [  129.644024] EAX: 40412000 EBX: 40396cd8 ECX: 0909ee98 EDX: 00044000
> > [  129.644024] ESI: 00000034 EDI: 0909edd8 EBP: bfe7f798 ESP: bfe7f780
> > [  129.644024]  DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b
> > [  129.644024] Process X (pid: 3690, ti=ea1ce000 task=ea77f110
> > task.ti=ea1ce000)
> > [  129.644024]
> > [  129.644024] EIP: [<40394596>] 0x40394596 SS:ESP 007b:bfe7f780
> > [  129.644024] ---[ end trace 569eb18d737a8611 ]---
> > [  129.652216] [drm] nouveau 0000:01:00.0: nouveau_channel_free: 
freeing
> > fifo 1
> >
> >
> > And my X log ends abruptly after this line:
> > (II) NOUVEAU(0): Opened GPU Channel 1
> >
> > Any ideas?
> > 
> 
> Well, this is generally the symptom that someone is confusing mfns and 
> pfns, and therefore ends up incorrectly setting the _PAGE_IO flag in 
> some pte.  If you run it under strace, can you identify which mapping 
> the fault is happening in?

I've attached the output of 'strace -o strace-Xorg Xorg'.  Figuring out 
which mapping the fault is happening in is a little over my head, I'm 
afraid.  If you need different arguments to strace, let me know and I'll 
do it again.

Thanks!

-Mike

---
Michael D Labriola
Electric Boat
mlabriol@xxxxxxxx
401-848-8871 (desk)
401-848-8513 (lab)
401-316-9844 (cell)

Attachment: strace-Xorg
Description: Binary data

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