[Intel-gfx] [PATCH] drm/i915: fix blank screen booting crashes
Jani Nikula
jani.nikula at linux.intel.com
Fri Oct 15 15:55:04 UTC 2021
On Fri, 15 Oct 2021, John Harrison <john.c.harrison at intel.com> wrote:
> On 10/15/2021 07:52, Tvrtko Ursulin wrote:
>> On 04/10/2021 08:36, Jani Nikula wrote:
>>> On Fri, 24 Sep 2021, Ville Syrjälä <ville.syrjala at linux.intel.com>
>>> wrote:
>>>> On Tue, Sep 21, 2021 at 06:50:39PM -0700, Matthew Brost wrote:
>>>>> From: Hugh Dickins <hughd at google.com>
>>>>>
>>>>> 5.15-rc1 crashes with blank screen when booting up on two ThinkPads
>>>>> using i915. Bisections converge convincingly, but arrive at different
>>>>> and surprising "culprits", none of them the actual culprit.
>>>>>
>>>>> netconsole (with init_netconsole() hacked to call i915_init() when
>>>>> logging has started, instead of by module_init()) tells the story:
>>>>>
>>>>> kernel BUG at drivers/gpu/drm/i915/i915_sw_fence.c:245!
>>>>> with RSI: ffffffff814d408b pointing to sw_fence_dummy_notify().
>>>>> I've been building with CONFIG_CC_OPTIMIZE_FOR_SIZE=y, and that
>>>>> function needs to be 4-byte aligned.
>>>>>
>>>>> v2:
>>>>> (Jani Nikula)
>>>>> - Change BUG_ON to WARN_ON
>>>>> v3:
>>>>> (Jani / Tvrtko)
>>>>> - Short circuit __i915_sw_fence_init on WARN_ON
>>>>> v4:
>>>>> (Lucas)
>>>>> - Break WARN_ON changes out in a different patch
>>>>>
>>>>> Fixes: 62eaf0ae217d ("drm/i915/guc: Support request cancellation")
>>>>> Signed-off-by: Hugh Dickins <hughd at google.com>
>>>>> Signed-off-by: Matthew Brost <matthew.brost at intel.com>
>>>>> Reviewed-by: Matthew Brost <matthew.brost at intel.com>
>>>>> ---
>>>>> drivers/gpu/drm/i915/gt/intel_context.c | 4 ++--
>>>>> 1 file changed, 2 insertions(+), 2 deletions(-)
>>>>>
>>>>> diff --git a/drivers/gpu/drm/i915/gt/intel_context.c
>>>>> b/drivers/gpu/drm/i915/gt/intel_context.c
>>>>> index ff637147b1a9..e7f78bc7ebfc 100644
>>>>> --- a/drivers/gpu/drm/i915/gt/intel_context.c
>>>>> +++ b/drivers/gpu/drm/i915/gt/intel_context.c
>>>>> @@ -362,8 +362,8 @@ static int __intel_context_active(struct
>>>>> i915_active *active)
>>>>> return 0;
>>>>> }
>>>>> -static int sw_fence_dummy_notify(struct i915_sw_fence *sf,
>>>>> - enum i915_sw_fence_notify state)
>>>>> +static int __i915_sw_fence_call
>>>>> +sw_fence_dummy_notify(struct i915_sw_fence *sf, enum
>>>>> i915_sw_fence_notify state)
>>>>> {
>>>>> return NOTIFY_DONE;
>>>>> }
>>>>
>>>> This thing seems broken beyond just this alignment stuff. I'm getting
>>>> this spew from DEBUG_OBJECTS all the time on a glk here:
>>>
>>> Nobody followed through with this, so:
>>>
>>> https://lore.kernel.org/r/20211002020257.34a0e882@oasis.local.home
>>>
>>> and
>>>
>>> cdc1e6e225e3 ("drm/i915: fix blank screen booting crashes")
>>
>> John you pushed this yesterday? Will this cause a problem now if we
>> have two commits for the same bug:
> I'm thoroughly confused.
>
> I finally got far enough down my backlog to reach this and it did not
> appear to be in the tree yet so I tried pushing it. The DIM tool gave me
> a bunch of errors that didn't seem to make any sense. It certainly gave
> me the impression that it did not actually do anything. So I gave up on
> it. But now it seems like it did actually push something? And it was
> already merged after all?
Linus merged it directly to his tree because we didn't follow through
with this soon enough. Linus' tree feeds to drm-tip via drm-intel-fixes,
but I guess we haven't done backmerges from Linux' tree to drm-next to
drm-intel-gt-next with that commit. Once you applied the patch, dim
rebuilt drm-tip, which now got the same change from both drm-intel-fixes
and drm-intel-gt-next.
It happens.
But in general, if there are regressions with blank screens at boot
occurring in Linus' tree, the fix needs to move much faster.
BR,
Jani.
>
> John.
>
>>
>> commit b0179f0d18dd7e6fb6b1c52c49ac21365257e97e
>> Author: Hugh Dickins <hughd at google.com>
>> AuthorDate: Tue Sep 21 18:50:39 2021 -0700
>> Commit: John Harrison <John.C.Harrison at Intel.com>
>> CommitDate: Thu Oct 14 18:29:01 2021 -0700
>>
>> drm/i915: fix blank screen booting crashes
>>
>>
>>
>> commit cdc1e6e225e3256d56dc6648411630e71d7c776b
>> Author: Hugh Dickins <hughd at google.com>
>> AuthorDate: Sat Oct 2 03:17:29 2021 -0700
>> Commit: Linus Torvalds <torvalds at linux-foundation.org>
>> CommitDate: Sat Oct 2 09:39:15 2021 -0700
>>
>> drm/i915: fix blank screen booting crashes
>>
>> Regards,
>>
>> Tvrtko
>>
>>>
>>>
>>> BR,
>>> Jani.
>>>
>>>
>>>>
>>>> [ 48.122629] ------------[ cut here ]------------
>>>> [ 48.122640] ODEBUG: init destroyed (active state 0) object type:
>>>> i915_sw_fence hint: sw_fence_dummy_notify+0x0/0x10 [i915]
>>>> [ 48.122963] WARNING: CPU: 0 PID: 815 at lib/debugobjects.c:505
>>>> debug_print_object+0x6e/0x90
>>>> [ 48.122976] Modules linked in: i915 i2c_algo_bit ttm
>>>> drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops
>>>> prime_numbers intel_gtt agpgart fuse nls_iso8859_1 nls_cp437 vfat
>>>> fat intel_rapl_msr wmi_bmof intel_rapl_common x86_pkg_temp_thermal
>>>> r8169 realtek mdio_devres coretemp libphy efi_pstore evdev sdhci_pci
>>>> cqhci sdhci mei_me mmc_core i2c_i801 intel_pmc_core mei led_class
>>>> wmi i2c_smbus sch_fq_codel drm ip_tables x_tables ipv6 autofs4
>>>> [ 48.123119] CPU: 0 PID: 815 Comm: kms_async_flips Not tainted
>>>> 5.15.0-rc2-hsw+ #131
>>>> [ 48.123125] Hardware name: Intel Corporation NUC7CJYH/NUC7JYB,
>>>> BIOS JYGLKCPX.86A.0027.2018.0125.1347 01/25/2018
>>>> [ 48.123129] RIP: 0010:debug_print_object+0x6e/0x90
>>>> [ 48.123137] Code: 07 08 02 83 c0 01 8b 4b 14 4c 8b 45 00 48 c7 c7
>>>> a0 19 0a 82 89 05 66 07 08 02 8b 43 10 48 8b 14 c5 c0 0d e4 81 e8 d7
>>>> 2e 3c 00 <0f> 0b 83 05 c5 c0 0c 01 01 48 83 c4 08 5b 5d c3 83 05 b7
>>>> c0 0c 01
>>>> [ 48.123142] RSP: 0018:ffffc90000dabae0 EFLAGS: 00010282
>>>> [ 48.123150] RAX: 0000000000000000 RBX: ffff88810004f848 RCX:
>>>> 0000000000000000
>>>> [ 48.123154] RDX: 0000000080000001 RSI: ffffffff8112673f RDI:
>>>> ffffffff8112673f
>>>> [ 48.123159] RBP: ffffffffa0577480 R08: ffff88827fbfcfe8 R09:
>>>> 000000000009fffb
>>>> [ 48.123163] R10: 00000000fffe0000 R11: 3fffffffffffffff R12:
>>>> ffff88810a04d100
>>>> [ 48.123167] R13: ffff88810a07d308 R14: ffff888109990800 R15:
>>>> ffff88810997b800
>>>> [ 48.123171] FS: 00007ffff624b9c0(0000) GS:ffff888276e00000(0000)
>>>> knlGS:0000000000000000
>>>> [ 48.123176] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>>>> [ 48.123181] CR2: 00007ffff7f93bf0 CR3: 0000000108e56000 CR4:
>>>> 0000000000350ef0
>>>> [ 48.123185] Call Trace:
>>>> [ 48.123190] i915_sw_fence_reinit+0x15/0x40 [i915]
>>>> [ 48.123341] intel_context_init+0x16b/0x1d0 [i915]
>>>> [ 48.123492] intel_context_create+0x33/0x100 [i915]
>>>> [ 48.123642] default_engines+0x9d/0x120 [i915]
>>>> [ 48.123806] i915_gem_create_context+0x465/0x630 [i915]
>>>> [ 48.125964] ? trace_kmalloc+0x29/0xd0
>>>> [ 48.125976] ? kmem_cache_alloc_trace+0x121/0x620
>>>> [ 48.125984] i915_gem_context_open+0x145/0x1d0 [i915]
>>>> [ 48.126172] i915_gem_open+0x75/0xb0 [i915]
>>>> [ 48.126364] drm_file_alloc+0x1b1/0x280 [drm]
>>>> [ 48.126427] drm_open+0xde/0x250 [drm]
>>>> [ 48.126482] drm_stub_open+0xa8/0x130 [drm]
>>>> [ 48.126538] chrdev_open+0xbf/0x240
>>>> [ 48.126547] ? cdev_device_add+0x90/0x90
>>>> [ 48.126553] do_dentry_open+0x151/0x3a0
>>>> [ 48.126560] path_openat+0x76f/0xa10
>>>> [ 48.126568] do_filp_open+0xa9/0x150
>>>> [ 48.126575] ? preempt_count_sub+0x9b/0xd0
>>>> [ 48.126584] ? _raw_spin_unlock+0x29/0x40
>>>> [ 48.126593] do_sys_openat2+0x97/0x160
>>>> [ 48.126600] __x64_sys_openat+0x54/0x90
>>>> [ 48.126607] do_syscall_64+0x38/0x90
>>>> [ 48.126614] entry_SYSCALL_64_after_hwframe+0x44/0xae
>>>> [ 48.126622] RIP: 0033:0x7ffff7cdca5b
>>>> [ 48.126630] Code: 25 00 00 41 00 3d 00 00 41 00 74 4b 64 8b 04 25
>>>> 18 00 00 00 85 c0 75 67 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00
>>>> 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 91 00 00 00 48 8b 4c 24 28 64 48
>>>> 33 0c 25
>>>> [ 48.126636] RSP: 002b:00007fffffffda20 EFLAGS: 00000246 ORIG_RAX:
>>>> 0000000000000101
>>>> [ 48.126645] RAX: ffffffffffffffda RBX: 00007fffffffdb60 RCX:
>>>> 00007ffff7cdca5b
>>>> [ 48.126649] RDX: 0000000000000002 RSI: 00007fffffffdb60 RDI:
>>>> 00000000ffffff9c
>>>> [ 48.126654] RBP: 00007fffffffdb60 R08: 0000000000000001 R09:
>>>> 000000000000000e
>>>> [ 48.126658] R10: 0000000000000000 R11: 0000000000000246 R12:
>>>> 0000000000000002
>>>> [ 48.126663] R13: 00007ffff7f9406a R14: 0000000000000000 R15:
>>>> 00000000fffffffb
>>>> [ 48.126669] irq event stamp: 29565
>>>> [ 48.126673] hardirqs last enabled at (29571):
>>>> [<ffffffff81126357>] __up_console_sem+0x67/0x70
>>>> [ 48.126682] hardirqs last disabled at (29576):
>>>> [<ffffffff8112633c>] __up_console_sem+0x4c/0x70
>>>> [ 48.126689] softirqs last enabled at (29394):
>>>> [<ffffffff81c0032c>] __do_softirq+0x32c/0x499
>>>> [ 48.126696] softirqs last disabled at (29371):
>>>> [<ffffffff810ba2ed>] irq_exit_rcu+0xdd/0x130
>>>> [ 48.126704] ---[ end trace 4978f2ce56481e4b ]---
>>>> [ 48.126711] ------------[ cut here ]------------
>>>> [ 48.126714] ODEBUG: activate destroyed (active state 0) object
>>>> type: i915_sw_fence hint: sw_fence_dummy_notify+0x0/0x10 [i915]
>>>> [ 48.127053] WARNING: CPU: 1 PID: 815 at lib/debugobjects.c:505
>>>> debug_print_object+0x6e/0x90
>>>> [ 48.127062] Modules linked in: i915 i2c_algo_bit ttm
>>>> drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops
>>>> prime_numbers intel_gtt agpgart fuse nls_iso8859_1 nls_cp437 vfat
>>>> fat intel_rapl_msr wmi_bmof intel_rapl_common x86_pkg_temp_thermal
>>>> r8169 realtek mdio_devres coretemp libphy efi_pstore evdev sdhci_pci
>>>> cqhci sdhci mei_me mmc_core i2c_i801 intel_pmc_core mei led_class
>>>> wmi i2c_smbus sch_fq_codel drm ip_tables x_tables ipv6 autofs4
>>>> [ 48.127216] CPU: 1 PID: 815 Comm: kms_async_flips Tainted:
>>>> G W 5.15.0-rc2-hsw+ #131
>>>> [ 48.127221] Hardware name: Intel Corporation NUC7CJYH/NUC7JYB,
>>>> BIOS JYGLKCPX.86A.0027.2018.0125.1347 01/25/2018
>>>> [ 48.127226] RIP: 0010:debug_print_object+0x6e/0x90
>>>> [ 48.127232] Code: 07 08 02 83 c0 01 8b 4b 14 4c 8b 45 00 48 c7 c7
>>>> a0 19 0a 82 89 05 66 07 08 02 8b 43 10 48 8b 14 c5 c0 0d e4 81 e8 d7
>>>> 2e 3c 00 <0f> 0b 83 05 c5 c0 0c 01 01 48 83 c4 08 5b 5d c3 83 05 b7
>>>> c0 0c 01
>>>> [ 48.127238] RSP: 0018:ffffc90000daba88 EFLAGS: 00010282
>>>> [ 48.127245] RAX: 0000000000000000 RBX: ffff88810004f848 RCX:
>>>> 0000000000000000
>>>> [ 48.127250] RDX: 0000000080000001 RSI: ffffffff8112673f RDI:
>>>> ffffffff8112673f
>>>> [ 48.127254] RBP: ffffffffa0577480 R08: ffff88827fbfcfe8 R09:
>>>> 000000000009fffb
>>>> [ 48.127259] R10: 00000000fffe0000 R11: 3fffffffffffffff R12:
>>>> ffff88810a04d468
>>>> [ 48.127263] R13: ffffffffa0577480 R14: ffffffff835ce0b8 R15:
>>>> ffff88810997b800
>>>> [ 48.127268] FS: 00007ffff624b9c0(0000) GS:ffff888276e80000(0000)
>>>> knlGS:0000000000000000
>>>> [ 48.127273] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>>>> [ 48.127277] CR2: 000055555556f5e8 CR3: 0000000108e56000 CR4:
>>>> 0000000000350ee0
>>>> [ 48.127282] Call Trace:
>>>> [ 48.127287] debug_object_activate+0x174/0x200
>>>> [ 48.127296] i915_sw_fence_commit+0x15/0x20 [i915]
>>>> [ 48.127461] intel_context_init+0x173/0x1d0 [i915]
>>>> [ 48.127627] intel_context_create+0x33/0x100 [i915]
>>>> [ 48.127792] default_engines+0x9d/0x120 [i915]
>>>> [ 48.127971] i915_gem_create_context+0x465/0x630 [i915]
>>>> [ 48.128195] ? trace_kmalloc+0x29/0xd0
>>>> [ 48.128203] ? kmem_cache_alloc_trace+0x121/0x620
>>>> [ 48.128211] i915_gem_context_open+0x145/0x1d0 [i915]
>>>> [ 48.128389] i915_gem_open+0x75/0xb0 [i915]
>>>> [ 48.128577] drm_file_alloc+0x1b1/0x280 [drm]
>>>> [ 48.128632] drm_open+0xde/0x250 [drm]
>>>> [ 48.128687] drm_stub_open+0xa8/0x130 [drm]
>>>> [ 48.128742] chrdev_open+0xbf/0x240
>>>> [ 48.128749] ? cdev_device_add+0x90/0x90
>>>> [ 48.128754] do_dentry_open+0x151/0x3a0
>>>> [ 48.128761] path_openat+0x76f/0xa10
>>>> [ 48.128768] do_filp_open+0xa9/0x150
>>>> [ 48.128775] ? preempt_count_sub+0x9b/0xd0
>>>> [ 48.128782] ? _raw_spin_unlock+0x29/0x40
>>>> [ 48.128789] do_sys_openat2+0x97/0x160
>>>> [ 48.128795] __x64_sys_openat+0x54/0x90
>>>> [ 48.128802] do_syscall_64+0x38/0x90
>>>> [ 48.128808] entry_SYSCALL_64_after_hwframe+0x44/0xae
>>>> [ 48.128815] RIP: 0033:0x7ffff7cdca5b
>>>> [ 48.128821] Code: 25 00 00 41 00 3d 00 00 41 00 74 4b 64 8b 04 25
>>>> 18 00 00 00 85 c0 75 67 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00
>>>> 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 91 00 00 00 48 8b 4c 24 28 64 48
>>>> 33 0c 25
>>>> [ 48.128826] RSP: 002b:00007fffffffda20 EFLAGS: 00000246 ORIG_RAX:
>>>> 0000000000000101
>>>> [ 48.128835] RAX: ffffffffffffffda RBX: 00007fffffffdb60 RCX:
>>>> 00007ffff7cdca5b
>>>> [ 48.128839] RDX: 0000000000000002 RSI: 00007fffffffdb60 RDI:
>>>> 00000000ffffff9c
>>>> [ 48.128844] RBP: 00007fffffffdb60 R08: 0000000000000001 R09:
>>>> 000000000000000e
>>>> [ 48.128848] R10: 0000000000000000 R11: 0000000000000246 R12:
>>>> 0000000000000002
>>>> [ 48.128852] R13: 00007ffff7f9406a R14: 0000000000000000 R15:
>>>> 00000000fffffffb
>>>> [ 48.128859] irq event stamp: 30217
>>>> [ 48.128862] hardirqs last enabled at (30223):
>>>> [<ffffffff81126357>] __up_console_sem+0x67/0x70
>>>> [ 48.128869] hardirqs last disabled at (30228):
>>>> [<ffffffff8112633c>] __up_console_sem+0x4c/0x70
>>>> [ 48.128875] softirqs last enabled at (30050):
>>>> [<ffffffff81c0032c>] __do_softirq+0x32c/0x499
>>>> [ 48.128881] softirqs last disabled at (30035):
>>>> [<ffffffff810ba2ed>] irq_exit_rcu+0xdd/0x130
>>>> [ 48.128888] ---[ end trace 4978f2ce56481e4c ]---
>>>> [ 48.128895] ------------[ cut here ]------------
>>>> [ 48.128899] ODEBUG: active_state destroyed (active state 0)
>>>> object type: i915_sw_fence hint: sw_fence_dummy_notify+0x0/0x10 [i915]
>>>> [ 48.129179] WARNING: CPU: 1 PID: 815 at lib/debugobjects.c:505
>>>> debug_print_object+0x6e/0x90
>>>> [ 48.129187] Modules linked in: i915 i2c_algo_bit ttm
>>>> drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops
>>>> prime_numbers intel_gtt agpgart fuse nls_iso8859_1 nls_cp437 vfat
>>>> fat intel_rapl_msr wmi_bmof intel_rapl_common x86_pkg_temp_thermal
>>>> r8169 realtek mdio_devres coretemp libphy efi_pstore evdev sdhci_pci
>>>> cqhci sdhci mei_me mmc_core i2c_i801 intel_pmc_core mei led_class
>>>> wmi i2c_smbus sch_fq_codel drm ip_tables x_tables ipv6 autofs4
>>>> [ 48.129328] CPU: 1 PID: 815 Comm: kms_async_flips Tainted:
>>>> G W 5.15.0-rc2-hsw+ #131
>>>> [ 48.129334] Hardware name: Intel Corporation NUC7CJYH/NUC7JYB,
>>>> BIOS JYGLKCPX.86A.0027.2018.0125.1347 01/25/2018
>>>> [ 48.129338] RIP: 0010:debug_print_object+0x6e/0x90
>>>> [ 48.129344] Code: 07 08 02 83 c0 01 8b 4b 14 4c 8b 45 00 48 c7 c7
>>>> a0 19 0a 82 89 05 66 07 08 02 8b 43 10 48 8b 14 c5 c0 0d e4 81 e8 d7
>>>> 2e 3c 00 <0f> 0b 83 05 c5 c0 0c 01 01 48 83 c4 08 5b 5d c3 83 05 b7
>>>> c0 0c 01
>>>> [ 48.129350] RSP: 0018:ffffc90000dabaa8 EFLAGS: 00010286
>>>> [ 48.129357] RAX: 0000000000000000 RBX: ffff88810004f848 RCX:
>>>> 0000000000000000
>>>> [ 48.129362] RDX: 0000000080000001 RSI: ffffffff8112673f RDI:
>>>> ffffffff8112673f
>>>> [ 48.129366] RBP: ffffffffa0577480 R08: ffff88827fbfcfe8 R09:
>>>> 000000000009fffb
>>>> [ 48.129371] R10: 00000000fffe0000 R11: 3fffffffffffffff R12:
>>>> ffff88810a04d100
>>>> [ 48.129375] R13: ffff88810a07d308 R14: 0000000000000000 R15:
>>>> ffff88810997b800
>>>> [ 48.129379] FS: 00007ffff624b9c0(0000) GS:ffff888276e80000(0000)
>>>> knlGS:0000000000000000
>>>> [ 48.129384] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>>>> [ 48.129389] CR2: 000055555556f5e8 CR3: 0000000108e56000 CR4:
>>>> 0000000000350ee0
>>>> [ 48.129393] Call Trace:
>>>> [ 48.129398] __i915_sw_fence_complete+0x70/0x240 [i915]
>>>> [ 48.129564] ? preempt_count_sub+0x9b/0xd0
>>>> [ 48.129572] intel_context_init+0x173/0x1d0 [i915]
>>>> [ 48.129738] intel_context_create+0x33/0x100 [i915]
>>>> [ 48.129902] default_engines+0x9d/0x120 [i915]
>>>> [ 48.130080] i915_gem_create_context+0x465/0x630 [i915]
>>>> [ 48.130258] ? trace_kmalloc+0x29/0xd0
>>>> [ 48.130264] ? kmem_cache_alloc_trace+0x121/0x620
>>>> [ 48.130271] i915_gem_context_open+0x145/0x1d0 [i915]
>>>> [ 48.130449] i915_gem_open+0x75/0xb0 [i915]
>>>> [ 48.130635] drm_file_alloc+0x1b1/0x280 [drm]
>>>> [ 48.130689] drm_open+0xde/0x250 [drm]
>>>> [ 48.130744] drm_stub_open+0xa8/0x130 [drm]
>>>> [ 48.130801] chrdev_open+0xbf/0x240
>>>> [ 48.130807] ? cdev_device_add+0x90/0x90
>>>> [ 48.130813] do_dentry_open+0x151/0x3a0
>>>> [ 48.130819] path_openat+0x76f/0xa10
>>>> [ 48.130826] do_filp_open+0xa9/0x150
>>>> [ 48.130833] ? preempt_count_sub+0x9b/0xd0
>>>> [ 48.130839] ? _raw_spin_unlock+0x29/0x40
>>>> [ 48.130847] do_sys_openat2+0x97/0x160
>>>> [ 48.130853] __x64_sys_openat+0x54/0x90
>>>> [ 48.130860] do_syscall_64+0x38/0x90
>>>> [ 48.130866] entry_SYSCALL_64_after_hwframe+0x44/0xae
>>>> [ 48.130873] RIP: 0033:0x7ffff7cdca5b
>>>> [ 48.130878] Code: 25 00 00 41 00 3d 00 00 41 00 74 4b 64 8b 04 25
>>>> 18 00 00 00 85 c0 75 67 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00
>>>> 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 91 00 00 00 48 8b 4c 24 28 64 48
>>>> 33 0c 25
>>>> [ 48.130883] RSP: 002b:00007fffffffda20 EFLAGS: 00000246 ORIG_RAX:
>>>> 0000000000000101
>>>> [ 48.130892] RAX: ffffffffffffffda RBX: 00007fffffffdb60 RCX:
>>>> 00007ffff7cdca5b
>>>> [ 48.130896] RDX: 0000000000000002 RSI: 00007fffffffdb60 RDI:
>>>> 00000000ffffff9c
>>>> [ 48.130901] RBP: 00007fffffffdb60 R08: 0000000000000001 R09:
>>>> 000000000000000e
>>>> [ 48.130905] R10: 0000000000000000 R11: 0000000000000246 R12:
>>>> 0000000000000002
>>>> [ 48.130909] R13: 00007ffff7f9406a R14: 0000000000000000 R15:
>>>> 00000000fffffffb
>>>> [ 48.130916] irq event stamp: 30843
>>>> [ 48.130919] hardirqs last enabled at (30849):
>>>> [<ffffffff81126357>] __up_console_sem+0x67/0x70
>>>> [ 48.130926] hardirqs last disabled at (30854):
>>>> [<ffffffff8112633c>] __up_console_sem+0x4c/0x70
>>>> [ 48.130932] softirqs last enabled at (30050):
>>>> [<ffffffff81c0032c>] __do_softirq+0x32c/0x499
>>>> [ 48.130938] softirqs last disabled at (30035):
>>>> [<ffffffff810ba2ed>] irq_exit_rcu+0xdd/0x130
>>>> [ 48.130944] ---[ end trace 4978f2ce56481e4d ]---
>>>> [ 48.130950] ------------[ cut here ]------------
>>>> [ 48.130954] ODEBUG: active_state destroyed (active state 0)
>>>> object type: i915_sw_fence hint: sw_fence_dummy_notify+0x0/0x10 [i915]
>>>> [ 48.131232] WARNING: CPU: 1 PID: 815 at lib/debugobjects.c:505
>>>> debug_print_object+0x6e/0x90
>>>> [ 48.131240] Modules linked in: i915 i2c_algo_bit ttm
>>>> drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops
>>>> prime_numbers intel_gtt agpgart fuse nls_iso8859_1 nls_cp437 vfat
>>>> fat intel_rapl_msr wmi_bmof intel_rapl_common x86_pkg_temp_thermal
>>>> r8169 realtek mdio_devres coretemp libphy efi_pstore evdev sdhci_pci
>>>> cqhci sdhci mei_me mmc_core i2c_i801 intel_pmc_core mei led_class
>>>> wmi i2c_smbus sch_fq_codel drm ip_tables x_tables ipv6 autofs4
>>>> [ 48.131381] CPU: 1 PID: 815 Comm: kms_async_flips Tainted:
>>>> G W 5.15.0-rc2-hsw+ #131
>>>> [ 48.131387] Hardware name: Intel Corporation NUC7CJYH/NUC7JYB,
>>>> BIOS JYGLKCPX.86A.0027.2018.0125.1347 01/25/2018
>>>> [ 48.131391] RIP: 0010:debug_print_object+0x6e/0x90
>>>> [ 48.131397] Code: 07 08 02 83 c0 01 8b 4b 14 4c 8b 45 00 48 c7 c7
>>>> a0 19 0a 82 89 05 66 07 08 02 8b 43 10 48 8b 14 c5 c0 0d e4 81 e8 d7
>>>> 2e 3c 00 <0f> 0b 83 05 c5 c0 0c 01 01 48 83 c4 08 5b 5d c3 83 05 b7
>>>> c0 0c 01
>>>> [ 48.131402] RSP: 0018:ffffc90000dabaa8 EFLAGS: 00010286
>>>> [ 48.131410] RAX: 0000000000000000 RBX: ffff88810004f848 RCX:
>>>> 0000000000000000
>>>> [ 48.131414] RDX: 0000000080000001 RSI: ffffffff8112673f RDI:
>>>> ffffffff8112673f
>>>> [ 48.131419] RBP: ffffffffa0577480 R08: ffff88827fbfcfe8 R09:
>>>> 000000000009fffb
>>>> [ 48.131423] R10: 00000000fffe0000 R11: 3fffffffffffffff R12:
>>>> ffff88810a04d100
>>>> [ 48.131427] R13: ffff88810a07d308 R14: 0000000000000000 R15:
>>>> ffff88810997b800
>>>> [ 48.131432] FS: 00007ffff624b9c0(0000) GS:ffff888276e80000(0000)
>>>> knlGS:0000000000000000
>>>> [ 48.131437] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>>>> [ 48.131441] CR2: 000055555556f5e8 CR3: 0000000108e56000 CR4:
>>>> 0000000000350ee0
>>>> [ 48.131446] Call Trace:
>>>> [ 48.131450] __i915_sw_fence_complete+0x9c/0x240 [i915]
>>>> [ 48.131614] ? preempt_count_sub+0x9b/0xd0
>>>> [ 48.131622] intel_context_init+0x173/0x1d0 [i915]
>>>> [ 48.131787] intel_context_create+0x33/0x100 [i915]
>>>> [ 48.131951] default_engines+0x9d/0x120 [i915]
>>>> [ 48.132129] i915_gem_create_context+0x465/0x630 [i915]
>>>> [ 48.132306] ? trace_kmalloc+0x29/0xd0
>>>> [ 48.132313] ? kmem_cache_alloc_trace+0x121/0x620
>>>> [ 48.132320] i915_gem_context_open+0x145/0x1d0 [i915]
>>>> [ 48.132498] i915_gem_open+0x75/0xb0 [i915]
>>>> [ 48.132685] drm_file_alloc+0x1b1/0x280 [drm]
>>>> [ 48.132739] drm_open+0xde/0x250 [drm]
>>>> [ 48.132793] drm_stub_open+0xa8/0x130 [drm]
>>>> [ 48.132849] chrdev_open+0xbf/0x240
>>>> [ 48.132855] ? cdev_device_add+0x90/0x90
>>>> [ 48.132861] do_dentry_open+0x151/0x3a0
>>>> [ 48.132867] path_openat+0x76f/0xa10
>>>> [ 48.132874] do_filp_open+0xa9/0x150
>>>> [ 48.132881] ? preempt_count_sub+0x9b/0xd0
>>>> [ 48.132887] ? _raw_spin_unlock+0x29/0x40
>>>> [ 48.132895] do_sys_openat2+0x97/0x160
>>>> [ 48.132901] __x64_sys_openat+0x54/0x90
>>>> [ 48.132907] do_syscall_64+0x38/0x90
>>>> [ 48.132914] entry_SYSCALL_64_after_hwframe+0x44/0xae
>>>> [ 48.132921] RIP: 0033:0x7ffff7cdca5b
>>>> [ 48.132926] Code: 25 00 00 41 00 3d 00 00 41 00 74 4b 64 8b 04 25
>>>> 18 00 00 00 85 c0 75 67 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00
>>>> 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 91 00 00 00 48 8b 4c 24 28 64 48
>>>> 33 0c 25
>>>> [ 48.132931] RSP: 002b:00007fffffffda20 EFLAGS: 00000246 ORIG_RAX:
>>>> 0000000000000101
>>>> [ 48.132939] RAX: ffffffffffffffda RBX: 00007fffffffdb60 RCX:
>>>> 00007ffff7cdca5b
>>>> [ 48.132944] RDX: 0000000000000002 RSI: 00007fffffffdb60 RDI:
>>>> 00000000ffffff9c
>>>> [ 48.132948] RBP: 00007fffffffdb60 R08: 0000000000000001 R09:
>>>> 000000000000000e
>>>> [ 48.132952] R10: 0000000000000000 R11: 0000000000000246 R12:
>>>> 0000000000000002
>>>> [ 48.132956] R13: 00007ffff7f9406a R14: 0000000000000000 R15:
>>>> 00000000fffffffb
>>>> [ 48.132963] irq event stamp: 31465
>>>> [ 48.132966] hardirqs last enabled at (31471):
>>>> [<ffffffff81126357>] __up_console_sem+0x67/0x70
>>>> [ 48.132973] hardirqs last disabled at (31476):
>>>> [<ffffffff8112633c>] __up_console_sem+0x4c/0x70
>>>> [ 48.132979] softirqs last enabled at (30050):
>>>> [<ffffffff81c0032c>] __do_softirq+0x32c/0x499
>>>> [ 48.132984] softirqs last disabled at (30035):
>>>> [<ffffffff810ba2ed>] irq_exit_rcu+0xdd/0x130
>>>> [ 48.132991] ---[ end trace 4978f2ce56481e4e ]---
>>>> [ 48.132996] ------------[ cut here ]------------
>>>> [ 48.133000] ODEBUG: deactivate destroyed (active state 0) object
>>>> type: i915_sw_fence hint: sw_fence_dummy_notify+0x0/0x10 [i915]
>>>> [ 48.133277] WARNING: CPU: 1 PID: 815 at lib/debugobjects.c:505
>>>> debug_print_object+0x6e/0x90
>>>> [ 48.133284] Modules linked in: i915 i2c_algo_bit ttm
>>>> drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops
>>>> prime_numbers intel_gtt agpgart fuse nls_iso8859_1 nls_cp437 vfat
>>>> fat intel_rapl_msr wmi_bmof intel_rapl_common x86_pkg_temp_thermal
>>>> r8169 realtek mdio_devres coretemp libphy efi_pstore evdev sdhci_pci
>>>> cqhci sdhci mei_me mmc_core i2c_i801 intel_pmc_core mei led_class
>>>> wmi i2c_smbus sch_fq_codel drm ip_tables x_tables ipv6 autofs4
>>>> [ 48.133425] CPU: 1 PID: 815 Comm: kms_async_flips Tainted:
>>>> G W 5.15.0-rc2-hsw+ #131
>>>> [ 48.133430] Hardware name: Intel Corporation NUC7CJYH/NUC7JYB,
>>>> BIOS JYGLKCPX.86A.0027.2018.0125.1347 01/25/2018
>>>> [ 48.133434] RIP: 0010:debug_print_object+0x6e/0x90
>>>> [ 48.133440] Code: 07 08 02 83 c0 01 8b 4b 14 4c 8b 45 00 48 c7 c7
>>>> a0 19 0a 82 89 05 66 07 08 02 8b 43 10 48 8b 14 c5 c0 0d e4 81 e8 d7
>>>> 2e 3c 00 <0f> 0b 83 05 c5 c0 0c 01 01 48 83 c4 08 5b 5d c3 83 05 b7
>>>> c0 0c 01
>>>> [ 48.133445] RSP: 0018:ffffc90000dabaa8 EFLAGS: 00010286
>>>> [ 48.133453] RAX: 0000000000000000 RBX: ffff88810004f848 RCX:
>>>> 0000000000000000
>>>> [ 48.133458] RDX: 0000000080000001 RSI: ffffffff8112673f RDI:
>>>> ffffffff8112673f
>>>> [ 48.133462] RBP: ffffffffa0577480 R08: ffff88827fbfcfe8 R09:
>>>> 000000000009fffb
>>>> [ 48.133468] R10: 00000000fffe0000 R11: 3fffffffffffffff R12:
>>>> ffff88810a04d100
>>>> [ 48.133472] R13: ffff88810a07d308 R14: 0000000000000000 R15:
>>>> ffff88810997b800
>>>> [ 48.133476] FS: 00007ffff624b9c0(0000) GS:ffff888276e80000(0000)
>>>> knlGS:0000000000000000
>>>> [ 48.133481] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>>>> [ 48.133486] CR2: 000055555556f5e8 CR3: 0000000108e56000 CR4:
>>>> 0000000000350ee0
>>>> [ 48.133490] Call Trace:
>>>> [ 48.133495] __i915_sw_fence_complete+0xab/0x240 [i915]
>>>> [ 48.133658] ? preempt_count_sub+0x9b/0xd0
>>>> [ 48.133666] intel_context_init+0x173/0x1d0 [i915]
>>>> [ 48.133830] intel_context_create+0x33/0x100 [i915]
>>>> [ 48.142705] default_engines+0x9d/0x120 [i915]
>>>> [ 48.142861] i915_gem_create_context+0x465/0x630 [i915]
>>>> [ 48.142996] ? trace_kmalloc+0x29/0xd0
>>>> [ 48.143003] ? kmem_cache_alloc_trace+0x121/0x620
>>>> [ 48.143009] i915_gem_context_open+0x145/0x1d0 [i915]
>>>> [ 48.143141] i915_gem_open+0x75/0xb0 [i915]
>>>> [ 48.143438] drm_file_alloc+0x1b1/0x280 [drm]
>>>> [ 48.143516] drm_open+0xde/0x250 [drm]
>>>> [ 48.143557] drm_stub_open+0xa8/0x130 [drm]
>>>> [ 48.143598] chrdev_open+0xbf/0x240
>>>> [ 48.143604] ? cdev_device_add+0x90/0x90
>>>> [ 48.143608] do_dentry_open+0x151/0x3a0
>>>> [ 48.143614] path_openat+0x76f/0xa10
>>>> [ 48.143619] do_filp_open+0xa9/0x150
>>>> [ 48.143625] ? preempt_count_sub+0x9b/0xd0
>>>> [ 48.143631] ? _raw_spin_unlock+0x29/0x40
>>>> [ 48.143638] do_sys_openat2+0x97/0x160
>>>> [ 48.143644] __x64_sys_openat+0x54/0x90
>>>> [ 48.143648] do_syscall_64+0x38/0x90
>>>> [ 48.143654] entry_SYSCALL_64_after_hwframe+0x44/0xae
>>>> [ 48.143660] RIP: 0033:0x7ffff7cdca5b
>>>> [ 48.143664] Code: 25 00 00 41 00 3d 00 00 41 00 74 4b 64 8b 04 25
>>>> 18 00 00 00 85 c0 75 67 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00
>>>> 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 91 00 00 00 48 8b 4c 24 28 64 48
>>>> 33 0c 25
>>>> [ 48.143668] RSP: 002b:00007fffffffda20 EFLAGS: 00000246 ORIG_RAX:
>>>> 0000000000000101
>>>> [ 48.143675] RAX: ffffffffffffffda RBX: 00007fffffffdb60 RCX:
>>>> 00007ffff7cdca5b
>>>> [ 48.143679] RDX: 0000000000000002 RSI: 00007fffffffdb60 RDI:
>>>> 00000000ffffff9c
>>>> [ 48.143682] RBP: 00007fffffffdb60 R08: 0000000000000001 R09:
>>>> 000000000000000e
>>>> [ 48.143685] R10: 0000000000000000 R11: 0000000000000246 R12:
>>>> 0000000000000002
>>>> [ 48.143688] R13: 00007ffff7f9406a R14: 0000000000000000 R15:
>>>> 00000000fffffffb
>>>> [ 48.143693] irq event stamp: 32275
>>>> [ 48.143696] hardirqs last enabled at (32281):
>>>> [<ffffffff81126357>] __up_console_sem+0x67/0x70
>>>> [ 48.143701] hardirqs last disabled at (32286):
>>>> [<ffffffff8112633c>] __up_console_sem+0x4c/0x70
>>>> [ 48.143706] softirqs last enabled at (32138):
>>>> [<ffffffff81c0032c>] __do_softirq+0x32c/0x499
>>>> [ 48.143710] softirqs last disabled at (32125):
>>>> [<ffffffff810ba2ed>] irq_exit_rcu+0xdd/0x130
>>>> [ 48.143716] ---[ end trace 4978f2ce56481e4f ]---
>>>
>
--
Jani Nikula, Intel Open Source Graphics Center
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