[Bug 88654] New: [BDW]igt/pm_rps/reset sporadically causes system hang

Tue Jan 20 23:26:22 PST 2015

https://bugs.freedesktop.org/show_bug.cgi?id=88654

            Bug ID: 88654
           Summary: [BDW]igt/pm_rps/reset sporadically causes system hang
           Product: DRI
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: huax.lu at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 112588
  --> https://bugs.freedesktop.org/attachment.cgi?id=112588&action=edit
dmesg

==System Environment==
--------------------------
Regression: not sure, fail rate:2/4

on-working platforms: BDW

==kernel==
--------------------------
drm-intel-nightly/d6bc7a6a0a7573350e8be8ec54002c20d1dbe1e0
commit d6bc7a6a0a7573350e8be8ec54002c20d1dbe1e0
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Tue Jan 20 15:10:59 2015 +0100

    drm-intel-nightly: 2015y-01m-20d-14h-10m-40s UTC integration manifest

==Bug detailed description==
-----------------------------
It sporadically causes system hang on BDW. This case also has bug 88096.

output:
IGT-Version: 1.9-ga29f28e (x86_64) (Linux:
3.19.0-rc4_drm-intel-nightly_d6bc7a_20150121+ x86_64)
(pm_rps:4777) intel-batchbuffer-CRITICAL: Test assertion failure function
intel_batchbuffer_flush_on_ring, file intel_batchbuffer.c:180:
(pm_rps:4777) intel-batchbuffer-CRITICAL: Failed assertion:
(drm_intel_gem_bo_context_exec(batch->bo, ctx, used, ring)) == 0
(pm_rps:4777) intel-batchbuffer-CRITICAL: Last errno: 16, Device or resource
busy
Subtest reset: FAIL (85.746s)
(pm_rps:4776) CRITICAL: Test assertion failure function loaded_check, file
pm_rps.c:509:
(pm_rps:4776) CRITICAL: Failed assertion: freqs[CUR] == freqs[MAX]
(pm_rps:4776) CRITICAL: error: 450 != 900
Subtest reset: FAIL (88.748s)
(pm_rps:4776) CRITICAL: Test assertion failure function load_helper_stop, file
pm_rps.c:290:
(pm_rps:4776) CRITICAL: Failed assertion: igt_wait_helper(&lh.igt_proc) == 0
(pm_rps:4776) CRITICAL: Last errno: 10, No child processes
pm_rps: igt_core.c:880: igt_fail: Assertion `!test_with_subtests || in_fixture'
failed.

dmesg:
[  135.692079] WARNING: CPU: 1 PID: 4777 at
drivers/gpu/drm/i915/intel_lrc.c:506
intel_logical_ring_advance_and_submit+0x73/0x254 [i915]()
[  135.694123] execlist context submission without request
[  135.694167] Modules linked in: netconsole configfs ipv6 dm_mod ac
acpi_cpufreq i915 button video drm_kms_helper drm cfbfillrect cfbimgblt
cfbcopyarea [last unloaded: netconsole]
[  135.698342] CPU: 1 PID: 4777 Comm: pm_rps Not tainted
3.19.0-rc4_drm-intel-nightly_d6bc7a_20150121+ #718
[  135.700497]  0000000000000000 0000000000000009 ffffffff81799600
ffff880148eeba78
[  135.702677]  ffffffff8103bdcc 0000000000000000 ffffffffa00ba85f
0000000000020000
[  135.704854]  ffff880002ed18b8 0000000000000000 ffff880002ed0000
ffff8801493b5600
[  135.707025] Call Trace:
[  135.709171]  [<ffffffff81799600>] ? dump_stack+0x40/0x50
[  135.711307]  [<ffffffff8103bdcc>] ? warn_slowpath_common+0x98/0xb0
[  135.713437]  [<ffffffffa00ba85f>] ?
intel_logical_ring_advance_and_submit+0x73/0x254 [i915]
[  135.715562]  [<ffffffff8103be7c>] ? warn_slowpath_fmt+0x45/0x4a
[  135.717675]  [<ffffffffa00ba85f>] ?
intel_logical_ring_advance_and_submit+0x73/0x254 [i915]
[  135.719785]  [<ffffffffa010bb08>] ? logical_ring_wait_for_space+0xc2/0x150
[i915]
[  135.721887]  [<ffffffffa00bad26>] ? intel_logical_ring_begin+0xea/0x1ea
[i915]
[  135.723992]  [<ffffffff8110d473>] ? kmem_cache_free+0xf6/0x134
[  135.726096]  [<ffffffffa00baf02>] ? gen8_emit_flush_render+0x3d/0xe1 [i915]
[  135.728198]  [<ffffffffa00bb37e>] ? intel_execlists_submission+0x230/0x34b
[i915]
[  135.730306]  [<ffffffffa009e24b>] ?
i915_gem_do_execbuffer.isra.12+0xc21/0xd08 [i915]
[  135.732425]  [<ffffffff813f40e5>] ? __pm_runtime_resume+0x5b/0x6a
[  135.734533]  [<ffffffff8110d850>] ? __kmalloc+0x66/0x151
[  135.736622]  [<ffffffffa009f285>] ? i915_gem_execbuffer2+0x172/0x209 [i915]
[  135.738709]  [<ffffffffa009f113>] ? i915_gem_execbuffer+0x350/0x350 [i915]
[  135.740782]  [<ffffffffa001070a>] ? drm_ioctl+0x279/0x3bc [drm]
[  135.742861]  [<ffffffff8113363d>] ? __inode_wait_for_writeback+0x5c/0xa2
[  135.744917]  [<ffffffff81081217>] ? ktime_get+0x44/0x80
[  135.746948]  [<ffffffffa009f113>] ? i915_gem_execbuffer+0x350/0x350 [i915]
[  135.748957]  [<ffffffff8107d542>] ? hrtimer_try_to_cancel+0xa0/0xab
[  135.750939]  [<ffffffff8107d559>] ? hrtimer_cancel+0xc/0x16
[  135.752891]  [<ffffffff811222f5>] ? do_vfs_ioctl+0x412/0x459
[  135.754847]  [<ffffffff8107dead>] ? hrtimer_nanosleep+0x89/0x10b
[  135.756787]  [<ffffffff8107d1bb>] ? update_rmtp+0x60/0x60
[  135.758711]  [<ffffffff81122385>] ? SyS_ioctl+0x49/0x78
[  135.760624]  [<ffffffff8179efd2>] ? system_call_fastpath+0x12/0x17
[  135.762552] ---[ end trace 9955234f7d4f624c ]---
[  135.764486] ------------[ cut here ]------------
[  135.766402] WARNING: CPU: 3 PID: 4777 at include/linux/kref.h:47
intel_logical_ring_advance_and_submit+0xed/0x254 [i915]()

==Reproduce steps==
---------------------------- 
1.  ./pm_rps --run-subtest reset

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