[Intel-gfx] [CI 11/15] drm/i915/huc: track delayed HuC load with a fence

[Brian Norris]

Hi,

On Wed, Oct 19, 2022 at 10:54:34AM +0100, Tvrtko Ursulin wrote:
> Don't know if this is real or not yet, hit it while running selftests a bit. Something to keep an eye on.
> 
> [ 2928.370577] ODEBUG: init destroyed (active state 0) object type: i915_sw_fence hint: sw_fence_dummy_notify+0x0/0x10 [i915]
> [ 2928.370903] WARNING: CPU: 2 PID: 1113 at lib/debugobjects.c:502 debug_print_object+0x6b/0x90
> [ 2928.370984] Modules linked in: i915(+) drm_display_helper drm_kms_helper netconsole cmac algif_hash algif_skcipher af_alg bnep nls_iso8859_1 snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_intel_dspcfg snd_hda_codec snd_hwdep snd_hda_core snd_pcm intel_tcc_cooling x86_pkg_temp_thermal intel_powerclamp snd_seq_midi snd_seq_midi_event coretemp snd_rawmidi btusb btrtl btbcm kvm_intel btmtk btintel ath10k_pci snd_seq kvm ath10k_core bluetooth snd_timer rapl intel_cstate snd_seq_device input_leds mac80211 ecdh_generic libarc4 ath snd ecc serio_raw intel_wmi_thunderbolt at24 soundcore cfg80211 mei_me intel_xhci_usb_role_switch mei ideapad_laptop intel_pch_thermal platform_profile sparse_keymap acpi_pad sch_fq_codel msr efi_pstore ip_tables x_tables autofs4 crct10dif_pclmul crc32_pclmul ghash_clmulni_intel sha512_ssse3 aesni_intel prime_numbers crypto_simd atkbd drm_buddy cryptd vivaldi_fmap r8169 ttm i2c_i801 i2c_smbus cec realtek xhci_pci syscopyarea ahci
> [ 2928.371145]  xhci_pci_renesas sysfillrect sysimgblt libahci fb_sys_fops video wmi [last unloaded: drm_kms_helper]
> [ 2928.371489] CPU: 2 PID: 1113 Comm: modprobe Tainted: G     U  W          6.1.0-rc1 #196
> [ 2928.371550] Hardware name: LENOVO 80MX/Lenovo E31-80, BIOS DCCN34WW(V2.03) 12/01/2015
> [ 2928.371615] RIP: 0010:debug_print_object+0x6b/0x90
> [ 2928.371664] Code: 49 89 c1 8b 43 10 83 c2 01 48 c7 c7 e8 be d6 bb 8b 4b 14 89 15 ca be b4 02 4c 8b 45 00 48 8b 14 c5 40 56 a8 bb e8 ec 5b 60 00 <0f> 0b 83 05 28 5a 3e 01 01 48 83 c4 08 5b 5d c3 83 05 1a 5a 3e 01
> [ 2928.371782] RSP: 0018:ffff9ed841607a18 EFLAGS: 00010286
> [ 2928.371841] RAX: 0000000000000000 RBX: ffff9208116a1d48 RCX: 0000000000000000
> [ 2928.371909] RDX: 0000000000000001 RSI: ffffffffbbd277d2 RDI: 00000000ffffffff
> [ 2928.372024] RBP: ffffffffc176a540 R08: 0000000000000000 R09: ffffffffbc07a1e0
> [ 2928.372128] R10: 0000000000000001 R11: 0000000000000001 R12: ffff9208122da830
> [ 2928.372192] R13: ffff92080089b000 R14: ffff9208122da770 R15: 0000000000000000
> [ 2928.372259] FS:  00007f53e7617c40(0000) GS:ffff92086e500000(0000) knlGS:0000000000000000
> [ 2928.372365] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 2928.372425] CR2: 000055cd28b33070 CR3: 0000000110dbd006 CR4: 00000000003706e0
> [ 2928.372526] Call Trace:
> [ 2928.372568]  <TASK>
> [ 2928.372614]  ? intel_guc_hang_check+0xb0/0xb0 [i915]
> [ 2928.373001]  __i915_sw_fence_init+0x2b/0x50 [i915]
> [ 2928.373374]  intel_huc_init_early+0x75/0xb0 [i915]
> [ 2928.373868]  intel_uc_init_early+0x4e/0x210 [i915]
> [ 2928.374241]  intel_gt_common_init_early+0x16f/0x180 [i915]
> [ 2928.374718]  intel_root_gt_init_early+0x49/0x60 [i915]
> [ 2928.375074]  i915_driver_probe+0x917/0xed0 [i915]
...

Did you track this down? Or consider reverting? This is tripping me up
on drm-tip now when running selftests with CONFIG_DEBUG_OBJECTS=y /
CONFIG_DRM_I915_SW_FENCE_DEBUG_OBJECTS=y. It means I can't actually run
any subsequent tests, because of the kernel taint.

Brian