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[Xen-devel] pvops: i915 kms crashs with corrupt page table


I run a 2.6.32 dom0 kernel (the Debian distribution config). If I enable
KMS in the intel driver, Xorg crashs with corrupt page table.

| Xorg: Corrupted page table at address 7fd9e2f86000
| PGD 745d0067 PUD 74d1f067 PMD 72cae067 PTE fffffffffffff22f
| Bad pagetable: 000f [#1] SMP 
| last sysfs file: /sys/devices/virtual/backlight/acpi_video0/brightness
| CPU 0 
| Modules linked in: i915 drm_kms_helper xen_evtchn xenfs bridge stp 
firewire_sbp2 loop dm_snapshot snd_hda_codec_analog ide_cs arc4 snd_hda_intel 
snd_hda_codec snd_hwdep ecb snd_pcm snd_timer joydev snd hp_accel lis3lv02d 
parport_pc pcmcia irda soundcore parport tpm_infineon iwlagn yenta_socket tpm 
rsrc_nonstatic container evdev input_polldev crc_ccitt iwlcore ac 
snd_page_alloc pcspkr tpm_bios pcmcia_core wmi battery mac80211 processor 
cfg80211 rfkill serio_raw psmouse ext3 jbd mbcache dm_mod sd_mod crc_t10dif 
ide_cd_mod cdrom ata_generic uhci_hcd ide_pci_generic ahci sdhci_pci sdhci 
ricoh_mmc firewire_ohci firewire_core crc_itu_t mmc_core led_class intel_agp 
drm i2c_algo_bit button i2c_core video output e1000e libata scsi_mod ehci_hcd 
piix ide_core usbcore nls_base thermal fan thermal_sys [last unloaded: 
| Pid: 1955, comm: Xorg Not tainted 2.6.32-3-xen-amd64 #1 HP Compaq 6910p
| RIP: e033:[<00007fd9e34dc0a0>]  [<00007fd9e34dc0a0>] 0x7fd9e34dc0a0
| RSP: e02b:00007fff0525abf8  EFLAGS: 00010246
| RAX: 0000000000000010 RBX: 00007fd9e2f86000 RCX: 0000000000000000
| RDX: 00000000ffff0000 RSI: 00000000ffffffff RDI: 000000000000ffff
| RBP: 0000000000000000 R08: 00007fd9e2f86000 R09: 0000000000000000
| R10: 0000000000000000 R11: 0000000000000002 R12: 0000000000000000
| R13: 0000000000000040 R14: 0000000400000000 R15: 0000000400000000
| FS:  00007fd9e786a790(0000) GS:ffff88000342f000(0000) knlGS:0000000000000000
| CS:  e033 DS: 0000 ES: 0000 CR0: 000000008005003b
| CR2: 00007fd9e2f86000 CR3: 0000000002b52000 CR4: 0000000000002660
| DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
| DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
| Process Xorg (pid: 1955, threadinfo ffff880001f2a000, task ffff880001e28e20)
| RIP  [<00007fd9e34dc0a0>] 0x7fd9e34dc0a0
|  RSP <00007fff0525abf8>
| ---[ end trace 8b2c5cb2c5b589cc ]---


There are always alternatives.
                -- Spock, "The Galileo Seven", stardate 2822.3

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