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<head>
<base href="https://bugs.freedesktop.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Warning during flashing workqueue"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103448">103448</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Warning during flashing workqueue
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>XOrg git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>wolf@wolfsden.cz
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>dmesg:
[191391.808993] workqueue: PF_MEMALLOC task 42(khugepaged) is flushing
!WQ_MEM_RECLAIM i915-userptr-release: (null)
[191391.809000] ------------[ cut here ]------------
[191391.809005] WARNING: CPU: 2 PID: 42 at kernel/workqueue.c:2418
check_flush_dependency+0xf3/0x100
[191391.809006] Modules linked in: tun veth cfg80211 bridge stp llc xt_tcpudp
nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack libcrc32c
crc32c_generic iptable_filter snd_hda_codec_hdmi snd_hda_codec_realtek
snd_hda_codec_generic iTCO_wdt iTCO_vendor_support mxm_wmi snd_hda_intel
intel_rapl x86_pkg_temp_thermal intel_powerclamp e1000e coretemp snd_hda_codec
snd_hda_core kvm_intel snd_hwdep hci_uart ptp btbcm btqca snd_pcm btintel
bluetooth kvm irqbypass pcspkr joydev mousedev input_leds tpm_tis mei_me
pps_core snd_timer snd intel_cstate intel_rapl_perf i2c_i801 soundcore shpchp
led_class ecdh_generic tpm_tis_core mei intel_pch_thermal tpm battery rfkill
wmi crc16 acpi_als kfifo_buf pinctrl_sunrisepoint pinctrl_intel evdev
industrialio acpi_pad mac_hid intel_lpss_acpi i2c_hid intel_lpss sch_fq_codel
[191391.809044] ip_tables x_tables btrfs xor raid6_pq algif_skcipher af_alg
dm_crypt dm_mod dax hid_logitech_hidpp hid_logitech_dj hid_generic sd_mod
usbhid hid crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel pcbc
aesni_intel aes_x86_64 crypto_simd glue_helper cryptd ahci libahci xhci_pci
xhci_hcd libata scsi_mod usbcore usb_common serio i915 video button intel_gtt
i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm
agpgart
[191391.809068] CPU: 2 PID: 42 Comm: khugepaged Not tainted 4.13.8-1-ARCH #1
[191391.809069] Hardware name: To Be Filled By O.E.M. To Be Filled By
O.E.M./Z170 Extreme7+, BIOS P7.40 05/04/2017
[191391.809070] task: ffff9974e3c86c80 task.stack: ffffb4d981a44000
[191391.809072] RIP: 0010:check_flush_dependency+0xf3/0x100
[191391.809073] RSP: 0018:ffffb4d981a476a0 EFLAGS: 00010286
[191391.809074] RAX: 000000000000006c RBX: ffff9974afa90c00 RCX:
ffffffff82a55328
[191391.809075] RDX: 0000000000000000 RSI: 0000000000000082 RDI:
0000000000000287
[191391.809076] RBP: ffffb4d981a476c0 R08: 000000000000042e R09:
ffffffff82ca68e0
[191391.809077] R10: ffffb4d981a47790 R11: 0000000000000000 R12:
0000000000000000
[191391.809077] R13: ffff9974e3c86c80 R14: 0000000000000000 R15:
ffffb4d981a47700
[191391.809079] FS: 0000000000000000(0000) GS:ffff9974f5d00000(0000)
knlGS:0000000000000000
[191391.809080] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[191391.809081] CR2: 0000358761675000 CR3: 0000000445a09000 CR4:
00000000003406e0
[191391.809082] Call Trace:
[191391.809085] flush_workqueue+0x13b/0x3f0
[191391.809105] i915_gem_userptr_mn_invalidate_range_start+0x148/0x160 [i915]
[191391.809119] ? i915_gem_userptr_mn_invalidate_range_start+0x148/0x160
[i915]
[191391.809122] __mmu_notifier_invalidate_range_start+0x55/0x80
[191391.809125] try_to_unmap_one+0x6fa/0x790
[191391.809128] rmap_walk_file+0xec/0x230
[191391.809130] rmap_walk+0x41/0x60
[191391.809132] try_to_unmap+0x91/0xf0
[191391.809134] ? page_remove_rmap+0x2a0/0x2a0
[191391.809136] ? page_not_mapped+0x20/0x20
[191391.809138] ? page_get_anon_vma+0xa0/0xa0
[191391.809140] migrate_pages+0x70d/0x9c0
[191391.809143] ? __ClearPageMovable+0x10/0x10
[191391.809145] ? isolate_freepages_block+0x3c0/0x3c0
[191391.809147] compact_zone+0x675/0x950
[191391.809149] compact_zone_order+0xa0/0xd0
[191391.809152] try_to_compact_pages+0xba/0x2b0
[191391.809153] ? try_to_compact_pages+0xba/0x2b0
[191391.809156] __alloc_pages_direct_compact+0x51/0xf0
[191391.809158] __alloc_pages_slowpath+0xae5/0xe10
[191391.809161] ? dequeue_task_fair+0x49f/0x640
[191391.809163] ? finish_task_switch+0x75/0x200
[191391.809165] ? get_page_from_freelist+0x349/0xb00
[191391.809167] ? del_timer_sync+0x39/0x40
[191391.809169] __alloc_pages_nodemask+0x237/0x250
[191391.809172] khugepaged+0x102a/0x1f70
[191391.809175] ? wait_woken+0x80/0x80
[191391.809177] kthread+0x125/0x140
[191391.809179] ? __collapse_huge_page_swapin+0x440/0x440
[191391.809181] ? kthread_create_on_node+0x70/0x70
[191391.809184] ret_from_fork+0x25/0x30
[191391.809186] Code: 00 8b b0 30 05 00 00 48 8d 8b b0 00 00 00 48 8d 90 d8 06
00 00 4d 89 e0 48 c7 c7 f0 6f 93 82 c6 05 65 ff a4 00 01 e8 9e 74 04 00 <0f> ff
e9 6b ff ff ff 66 0f 1f 44 00 00 0f 1f 44 00 00 48 8b 37
[191391.809214] ---[ end trace 13708d1e5a2f6990 ]---
$ uname -m
x86_64
$ uname -r
4.13.8-1-ARCH
Archlinux
ASRock Z170 Extreme7+
HDMI</pre>
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