[Bug 111817] New: workqueue: PF_MEMALLOC task 134(kswapd0) is flushing !WQ_MEM_RECLAIM events:gen6_pm_rps_work

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Sep 25 19:24:37 UTC 2019 

https://bugs.freedesktop.org/show_bug.cgi?id=111817

            Bug ID: 111817
           Summary: workqueue: PF_MEMALLOC task 134(kswapd0) is flushing
                    !WQ_MEM_RECLAIM events:gen6_pm_rps_work
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: not set
          Priority: not set
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: L.Bonnaud at laposte.net
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Bug description:

The kernel output a WARNING related to the i915 driver

System environment:
-- chipset: Intel(R) Core(TM) i5-7260U
-- xserver: 2:1.20.4-1ubuntu3
-- mesa: 19.0.8-0ubuntu0~19.04.1
-- libdrm: 2.4.97-1ubuntu1
-- kernel: Linux xxx 5.3.1-050301-generic #201909210632 SMP Sat Sep 21 06:34:27
UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
-- Linux distribution: Ubuntu 19.04 with mainline kernel
-- Machine or mobo model: NUC7i5BNB
-- Display connector: HDMI

Reproducing steps:

I use the Plasma desktop on this system but cannot tell precisely what I was
doing when the WARNING occurred.

Additional info:

[112602.597933] ------------[ cut here ]------------
[112602.597968] workqueue: PF_MEMALLOC task 134(kswapd0) is flushing
!WQ_MEM_RECLAIM events:gen6_pm_rps_work [i915]
[112602.597975] WARNING: CPU: 0 PID: 134 at kernel/workqueue.c:2598
check_flush_dependency+0xa7/0x140
[112602.597975] Modules linked in: ipt_REJECT nf_reject_ipv4 xt_multiport
iptable_filter bpfilter binfmt_misc nls_iso8859_1 dm_crypt snd_soc_skl
snd_hda_codec_hdmi snd_soc_hdac_hda snd_hda_ext_core snd_soc_skl_ipc
snd_soc_sst_ipc intel_rapl_msr snd_soc_sst_dsp snd_soc_acpi_intel_match
snd_hda_codec_realtek snd_soc_acpi snd_hda_codec_generic ledtrig_audio
snd_soc_core snd_compress ac97_bus snd_pcm_dmaengine snd_hda_intel mei_hdcp
snd_hda_codec snd_hda_core snd_hwdep intel_rapl_common snd_pcm
x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel snd_seq_midi
snd_seq_midi_event kvm irqbypass snd_rawmidi crct10dif_pclmul crc32_pclmul
ghash_clmulni_intel snd_seq snd_seq_device snd_timer aesni_intel aes_x86_64
wmi_bmof crypto_simd cryptd glue_helper intel_cstate intel_rapl_perf
intel_wmi_thunderbolt snd joydev soundcore input_leds btusb rtsx_pci_ms btrtl
btbcm memstick btintel ir_rc6_decoder bluetooth mei_me ecdh_generic
intel_xhci_usb_role_switch mei intel_pch_thermal roles ecc rc_rc6_mce
[112602.597993]  ite_cir rc_core acpi_pad mac_hid sch_fq_codel ip_tables
x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov
async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0
multipath linear hid_logitech_hidpp uas usb_storage hid_logitech_dj hid_generic
usbhid hid i915 rtsx_pci_sdmmc i2c_algo_bit drm_kms_helper nvme e1000e
syscopyarea sysfillrect i2c_i801 nvme_core sysimgblt rtsx_pci fb_sys_fops drm
ahci libahci wmi video
[112602.598006] CPU: 0 PID: 134 Comm: kswapd0 Not tainted 5.3.1-050301-generic
#201909210632
[112602.598007] Hardware name:  /NUC7i5BNB, BIOS
BNKBL357.86A.0080.2019.0725.1139 07/25/2019
[112602.598008] RIP: 0010:check_flush_dependency+0xa7/0x140
[112602.598010] Code: 8d 8a 70 0a 00 00 4d 89 e0 48 8d 8b b0 00 00 00 4c 89 ca
48 c7 c7 50 3c b3 b0 48 89 45 e0 c6 05 73 35 75 01 01 e8 f4 13 fe ff <0f> 0b 48
8b 45 e0 eb 0f 4c 89 ef e8 59 8d 00 00 41 f6 45 25 08 75
[112602.598010] RSP: 0018:ffffa8d2c018b7f0 EFLAGS: 00010086
[112602.598011] RAX: 0000000000000000 RBX: ffff8a286cc0ae00 RCX:
0000000000000000
[112602.598012] RDX: 0000000000000063 RSI: ffffffffb1380fc3 RDI:
0000000000000046
[112602.598012] RBP: ffffa8d2c018b810 R08: ffffffffb1380f60 R09:
0000000000000063
[112602.598012] R10: ffffffffb1381340 R11: 00000000b1380fab R12:
ffffffffc040c710
[112602.598013] R13: ffff8a286c1a0000 R14: 0000000000000001 R15:
ffff8a286eb30700
[112602.598014] FS:  0000000000000000(0000) GS:ffff8a286ea00000(0000)
knlGS:0000000000000000
[112602.598014] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[112602.598015] CR2: 00007ff4ece09000 CR3: 0000000016c0a003 CR4:
00000000003606f0
[112602.598015] Call Trace:
[112602.598018]  __flush_work+0x97/0x1d0
[112602.598020]  ? enqueue_hrtimer+0x3d/0x90
[112602.598021]  __cancel_work_timer+0x10e/0x190
[112602.598023]  ? _cond_resched+0x19/0x30
[112602.598024]  ? synchronize_irq+0x3e/0xb0
[112602.598025]  cancel_work_sync+0x10/0x20
[112602.598040]  gen6_disable_rps_interrupts+0x95/0xc0 [i915]
[112602.598052]  gen6_rps_idle+0x1f/0xf0 [i915]
[112602.598066]  intel_gt_park+0x5b/0x60 [i915]
[112602.598078]  __intel_wakeref_put_last+0x1c/0x50 [i915]
[112602.598091]  intel_gt_pm_put+0x44/0x50 [i915]
[112602.598104]  __engine_park+0xc3/0xd0 [i915]
[112602.598115]  __intel_wakeref_put_last+0x1c/0x50 [i915]
[112602.598127]  intel_engine_pm_put+0x44/0x50 [i915]
[112602.598139]  intel_context_exit_engine+0x12/0x20 [i915]
[112602.598155]  i915_request_retire+0x1b2/0x370 [i915]
[112602.598170]  ring_retire_requests+0x53/0x60 [i915]
[112602.598247]  i915_retire_requests+0x49/0x90 [i915]
[112602.598261]  i915_gem_shrink+0xcb/0x4d0 [i915]
[112602.598275]  i915_gem_shrinker_scan+0x64/0x120 [i915]
[112602.598276]  do_shrink_slab+0x150/0x2a0
[112602.598277]  ? shrink_node_memcg+0x2e5/0x370
[112602.598278]  shrink_slab+0xac/0x290
[112602.598279]  shrink_node+0xf4/0x490
[112602.598281]  balance_pgdat+0x319/0x590
[112602.598282]  kswapd+0x1ff/0x3c0
[112602.598283]  ? wait_woken+0x80/0x80
[112602.598285]  kthread+0x104/0x140
[112602.598286]  ? balance_pgdat+0x590/0x590
[112602.598287]  ? kthread_park+0x80/0x80
[112602.598288]  ret_from_fork+0x35/0x40
[112602.598289] ---[ end trace 539d72d1174933f6 ]---

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