[Kernels] intel vt switch hangs

[Mykola S. Grechukh]

30 апреля 2009 г. 15:08 пользователь Mykola S. Grechukh <> написал:
> 29 апреля 2009 г. 21:17 пользователь Konstantin A. Lepikhov
> <lakostis на unsafe.ru> написал:
>> Hi Mykola!
>>
>> Wednesday 29, at 04:28:41 PM you wrote:
>>
>>> Hello,
>>>
>>> http://www.gossamer-threads.com/lists/linux/kernel/1037365?page=last
>>>
>>> http://kerneltrap.org/index.php?q=mailarchive/linux-kernel/2008/11/5/4039804
>>>
>>> i've met this issue with lks-wks-2.6.28-alt4 (on eeepc 701).
>> Looks like this bug is simular to
>> http://bugzilla.kernel.org/show_bug.cgi?id=11947 but due very experimetal
>> and unstable work of intel driver in Sisyphus I'm unable to reproduce
>> this issue. You can try the 2.6.29 kernel from /testing/ repo and confirm
>> that this bug still exists or give more details about local configuration
>> (e.g. which xorg-server/xorg-drv-intel version was used and which ALT
>> distro).
>
> Hello,
>
> i've tested lks-wks-2.6.29-alt0.2 and it works fine. Thanks!
>
> NB: i use branch 5.0.
>
> But also on both .28 and .29 i've found another 100% reproducible
> kernel oops while dereferencing symlink to directory on ext3 filesystem:
>
> # mount /dev/sda2  /mnt/oldroot -t ext3
> # ls -l /mnt/oldroot
> .... works fine
> # ls -l /mnt/oldroot/_externall
> ...works fine
> $ ln -s /mnt/oldroot/_externall ~/
> $ ls -l /mnt/oldroot/_externall
> ... works fine
> $ ls -l ~/_externall/ -> ls hangs
>
> (i will try to get dmesg later)

Here it is:

   1.
      [  270.876242] BUG: unable to handle kernel paging request at 00098811
   2.
      [  270.876259] IP: [<e08498c3>] ext3_readdir+0xc1/0x5bb [ext3]
   3.
      [  270.876299] *pde = 00000000
   4.
      [  270.876309] Oops: 0000 [#1] SMP
   5.
      [  270.876319] last sysfs file:
/sys/devices/LNXSYSTM:00/device:00/ASUS010:00/rfkill/rfkill0/state
   6.
      [  270.876330] Modules linked in: ext3 jbd kqemu i915 drm
i2c_algo_bit af_packet sco bridge stp bnep l2cap bluetooth dm_mod aufs
joydev wlan_scan_sta ath_rate_sample snd_hda_codec_realtek uvcvideo
videodev snd_hda_intel v4l1_compat snd_hda_codec snd_hwdep ath_pci
psmouse i2c_i801 evdev serio_raw pcspkr snd_pcm i2c_core wlan
snd_timer ath_hal(P) snd intel_agp soundcore atl2 snd_page_alloc
agpgart video output eeepc_laptop thermal battery hwmon ac rfkill
button processor pciehp pci_hotplug squashfs zlib_inflate loop
nls_koi8_r nls_cp866 vfat fat nls_base ext2 mbcache sg sd_mod
usb_storage libusual ata_generic ide_pci_generic ide_core pata_acpi
ahci ata_piix libata scsi_mod ehci_hcd uhci_hcd hid_gaff hid_pl
hid_cypress hid_zpff hid_gyration hid_sony hid_ntrig hid_samsung
hid_microsoft hid_tmff hid_monterey hid_ezkey hid_apple hid_a4tech
hid_logitech usbhid usbcore ff_memless hid_cherry hid_sunplus
hid_petalynx hid_belkin hid_chicony
   7.
      [  270.876530]
   8.
      [  270.876539] Pid: 4946, comm: ls Tainted: P
(2.6.29-lks-wks-alt0.2 #1) 701
   9.
      [  270.876548] EIP: 0060:[<e08498c3>] EFLAGS: 00010206 CPU: 0
  10.
      [  270.876576] EIP is at ext3_readdir+0xc1/0x5bb [ext3]
  11.
      [  270.876583] EAX: 7fffffff EBX: 00000000 ECX: 00000000 EDX: 00000000
  12.
      [  270.876591] ESI: d5f2cf80 EDI: 00098801 EBP: d5f3ff6c ESP: d5f3fef4
  13.
      [  270.876598]  DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
  14.
      [  270.876607] Process ls (pid: 4946, ti=d5f3e000 task=c7458c30
task.ti=d5f3e000)
  15.
      [  270.876613] Stack:
  16.
      [  270.876617]  00000000 00034b82 c018cbdc d5f3ff94 d5f2cf80
000001f4 00000000 00000000
  17.
      [  270.876633]  d5da1800 c348cc38 00000000 00001000 00000008
00000000 49f9839a 00000000
  18.
      [  270.876651]  49f96ebe 00000000 49f96ebe 00000000 00034b82
00000000 d5f3ff60 00000003
  19.
      [  270.876669] Call Trace:
  20.
      [  270.876675]  [<c018cbdc>] ? filldir64+0x0/0xcd
  21.
      [  270.876692]  [<c018533b>] ? sys_fstat64+0x22/0x28
  22.
      [  270.876723]  [<c018ce80>] ? vfs_readdir+0x63/0x8f
  23.
      [  270.876732]  [<c018cbdc>] ? filldir64+0x0/0xcd
  24.
      [  270.876741]  [<c018cf0f>] ? sys_getdents64+0x63/0xa0
  25.
      [  270.876750]  [<c010307a>] ? syscall_call+0x7/0xb
  26.
      [  270.876762] Code: db 89 58 14 c7 40 18 00 00 00 00 8b 4d 98
89 41 6c 8b 75 98 31 d2 8b 5e 20 8b 4e 24 89 d8 35 ff ff ff 7f 09 c8
0f 84 c9 04 00 00 <39> 4f 10 75 05 39 5f 0c 74 27 89 f8 e8 d2 fd ff ff
c7 47 04 00
  27.
      [  270.876850] EIP: [<e08498c3>] ext3_readdir+0xc1/0x5bb [ext3]
SS:ESP 0068:d5f3fef4
  28.
      [  270.876886] ---[ end trace 82b423081df20a63 ]---

> /home in this case is aufs2-mounted tmpfs over squashfs.