[Bug 88909] [all bisected ]igt/kms_flip/bo-too-big-interruptible causes system hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88909

lu hua <huax.lu at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|medium                      |high
            Summary|[BYT bisected               |[all bisected
                   |]igt/kms_flip/bo-too-big-in |]igt/kms_flip/bo-too-big-in
                   |terruptible segment fault   |terruptible causes system
                   |                            |hang
           Severity|normal                      |critical

--- Comment #2 from lu hua <huax.lu at intel.com> ---
It impacts all platforms. I test it on SNB and PNV, system hang. They have the
same bisect commit.
Test on SNB, it takes more tan 10 minutes and doesn't exit testing. ctrl+c, it
also doesn't exit testing. I can connect it via ssh and reboot.
Test on PNV, system is no response.
output(SNB)
IGT-Version: 1.9-g51d87b8 (x86_64) (Linux: 3.19.0-rc5_kcloud_a67906_20150202+
x86_64)
Using monotonic timestamps
Beginning bo-too-big on crtc 19, connector 25
  1600x900 60 1600 1664 1706 1970 900 903 906 912 0xa 0x48 107800
^C^C^C^C^C^C^C^C^C^C

output on PNV:
IGT-Version: 1.9-g51d87b8 (i686) (Linux:
3.19.0-rc6_drm-intel-nightly_8b4216_20150201+ i686)
Using monotonic timestamps
Beginning bo-too-big on crtc 22, connector 23
  1024x600 60 1024 1072 1104 1200 600 603 609 625 0xa 0x48 45000

Message from syslogd at x-pnv2 at Feb  2 16:12:53 ...
 kernel:[20110.832007] CPU: 0 PID: 1596 Comm: kms_flip Tainted: G        W     
3.19.0-rc6_drm-intel-nightly_8b4216_20150201+ #90

Message from syslogd at x-pnv2 at Feb  2 16:12:53 ...
 kernel:[20110.832007] Hardware name: MICRO-STAR INTERNATIONAL CO., LTD
MS-N014/MS-N014, BIOS EN014IMS.10B 11/30/2009

Message from syslogd at x-pnv2 at Feb  2 16:12:53 ...
 kernel:[20110.832007] task: f634e300 ti: f08f6000 task.ti: f08f6000

Message from syslogd at x-pnv2 at Feb  2 16:12:53 ...
 kernel:[20110.832007] Stack:

Message from syslogd at x-pnv2 at Feb  2 16:12:53 ...
 kernel:[20110.832007] Call Trace:

Message from syslogd at x-pnv2 at Feb  2 16:12:53 ...
 kernel:[20110.832007] Code: cb 38 f8 68 b1 10 00 00 68 02 c2 38 f8 e8 32 3a d1
c8 83 c4 0c eb c7 5a 5b 5e c3 56 53 89 c3 56 e8 3d ff ff ff 85 c0 89 c6 75 02
<0f> 0b 8a 40 60 88 44 24 02 24 0f 88 44 24 03 75 02 0f 0b 8b 43

Message from syslogd at x-pnv2 at Feb  2 16:12:53 ...
 kernel:[20110.832007] EIP: [<f831f24a>] i915_gem_object_ggtt_unpin+0x10/0x61
[i915] SS:ESP 0068:f08f7cc8

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