[Bug 85959] New: X crashes right after start / when running multiple benchmark testcases

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85959

            Bug ID: 85959
           Summary: X crashes right after start / when running multiple
                    benchmark testcases
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Intel
          Assignee: chris at chris-wilson.co.uk
          Reporter: valtteri.rantala at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 109022
  --> https://bugs.freedesktop.org/attachment.cgi?id=109022&action=edit
Dmesg file from the run

X Crashes right after reboot. Dmesg reports page fault

System Environment:
--------------------------
Platform: Broadwell
drm git://anongit.freedesktop.org/git/mesa/drm origin/master
00847fa48b83a85b0cb882594a12ed1511f780db
mesa git://anongit.freedesktop.org/git/mesa/mesa origin/master
9e2473763d43f97e46561530e091473dc1e5780d
xserver git://anongit.freedesktop.org/git/xorg/xserver origin/master
63bb5c5ef16edf652179770294dcca4fc07dc992
xf86-video-intel git://anongit.freedesktop.org/git/xorg/driver/xf86-video-intel
origin/master ba408bf21c4b65f19c7b581e4c88c92805184334
libva git://anongit.freedesktop.org/git/vaapi/libva origin/master
ccd93de5a707e92a629cccd595757c8d436fa3cc
intel-driver git://anongit.freedesktop.org/git/vaapi/intel-driver origin/master
24cba20a119c96556ae4dc9a90043896ea70e567
drm-intel git://anongit.freedesktop.org/drm-intel origin/drm-intel-nightly
f8fcadba218fe6d23b2e353fea1cf0a4be4c9454 


Drm-intel:

The bisected to commit: f8fcadba218fe6d23b2e353fea1cf0a4be4c9454 

Reproduction steps:
On BDW/HSW brixbox X crashes right after boot or when running multiple
benchmarks (unigine -> glbenchmark -> gfxbench) 
Is bit hard to reproduce. At least with HSW laptop it seems not to be
reproducible.
1. Reboot machine with that build
2. If X does not crash try running multiple benchmark test. Try running in this
order unigine -> glbenchmark -> gfxbench

Part of dmesg:

[ 2357.881404] ------------[ cut here ]------------
[ 2357.881408] WARNING: CPU: 3 PID: 1223 at
drivers/gpu/drm/i915/i915_gem.c:1641 i915_gem_fault+0x1e2/0x340()
[ 2357.881411] unhandled error in i915_gem_fault: -22
[ 2357.881413] Modules linked in: snd_hda_codec_hdmi snd_hda_codec_realtek
snd_hda_codec_generic intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp
snd_hda_intel crct10dif_pclmul crc32_pclmul snd_hda_controller snd_hda_codec
smsc75xx usbnet snd_hwdep ghash_clmulni_intel mii snd_pcm mei_me mei lpc_ich
i2c_hid i2c_designware_platform i2c_designware_core
[ 2357.881438] CPU: 3 PID: 1223 Comm: Xorg Tainted: G        W     
3.18.0-rc3-gfxbench+ #1
[ 2357.881440] Hardware name: Dell Inc. XPS 12-9Q33/XPS 12-9Q33, BIOS A04
12/03/2013
[ 2357.881442]  0000000000000009 ffff8800d5727bc8 ffffffff81758bf5
0000000000000001
[ 2357.881447]  ffff8800d5727c18 ffff8800d5727c08 ffffffff810678fc
ffffffff81aad600
[ 2357.881453]  0000000000000002 0000000000000001 ffff8800d4550800
ffff88009f20b210
[ 2357.881458] Call Trace:
[ 2357.881462]  [<ffffffff81758bf5>] dump_stack+0x4f/0x7c
[ 2357.881466]  [<ffffffff810678fc>] warn_slowpath_common+0x7c/0xa0
[ 2357.881470]  [<ffffffff81067961>] warn_slowpath_fmt+0x41/0x50
[ 2357.881476]  [<ffffffff81492c8a>] ? i915_gem_object_ggtt_unpin+0x4a/0x80
[ 2357.881480]  [<ffffffff814968a2>] i915_gem_fault+0x1e2/0x340
[ 2357.881485]  [<ffffffff811430a4>] __do_fault+0x34/0x70
[ 2357.881490]  [<ffffffff8108cf41>] ? get_parent_ip+0x11/0x50
[ 2357.881495]  [<ffffffff8114584c>] do_shared_fault.isra.84+0x2c/0x1a0
[ 2357.881499]  [<ffffffff81143ce6>] ? __pte_alloc+0xa6/0x140
[ 2357.881504]  [<ffffffff8114ad90>] ? vma_link+0x80/0xc0
[ 2357.881508]  [<ffffffff811473d4>] handle_mm_fault+0x234/0xd90
[ 2357.881513]  [<ffffffff8114cdd9>] ? mmap_region+0x1a9/0x600
[ 2357.881519]  [<ffffffff81038021>] __do_page_fault+0x141/0x570
[ 2357.881523]  [<ffffffff81135d6d>] ? vm_mmap_pgoff+0x6d/0xa0
[ 2357.881529]  [<ffffffff8118bf10>] ? do_vfs_ioctl+0x2e0/0x4c0
[ 2357.881535]  [<ffffffff8103845c>] do_page_fault+0xc/0x10
[ 2357.881539]  [<ffffffff817617a2>] page_fault+0x22/0x30
[ 2357.881542] ---[ end trace 8796d4f938f80406 ]---

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