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<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 - workqueue: PF_MEMALLOC task 297(kswapd0) is flushing !WQ_MEM_RECLAIM events:gen6_pm_rps_work"
href="https://bugs.freedesktop.org/show_bug.cgi?id=112161">112161</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>workqueue: PF_MEMALLOC task 297(kswapd0) is flushing !WQ_MEM_RECLAIM events:gen6_pm_rps_work
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>DRI 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>minor
</td>
</tr>
<tr>
<th>Priority</th>
<td>not set
</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>kenny@panix.com
</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>
<tr>
<th>i915 platform</th>
<td>CFL
</td>
</tr></table>
<p>
<div>
<pre>I've been getting this from time-to-time. Not sure if it helps you guys.
This is Linus' tip kernel as of 27 October, with all recent i915 changes
reverted to pre August 2019 status (as drm-next merge causes frequent GPU HANGs
that make my system useless).
----
[code]Oct 28 11:59:18 hp-x360n kernel: [156262.539119] ------------[ cut here
]------------
Oct 28 11:59:18 hp-x360n kernel: [156262.539139] workqueue: PF_MEMALLOC task
297(kswapd0) is flushing !WQ_MEM_RECLAIM events:gen6_pm_rps_work [i915]
Oct 28 11:59:18 hp-x360n kernel: [156262.539143] WARNING: CPU: 5 PID: 297 at
kernel/workqueue.c:2600 check_flush_dependency+0x9d/0x130
Oct 28 11:59:18 hp-x360n kernel: [156262.539145] Modules linked in: r8152
wireguard(O) vmnet(O) vsock(O) vmw_vmci vmmon(O) btusb btintel iwlmvm mac80211
iwlwifi mei_hdcp cfg80211 i915
Oct 28 11:59:18 hp-x360n kernel: [156262.539151] CPU: 5 PID: 297 Comm: kswapd0
Tainted: G U W O 5.4.0-rc4-Kenny-old-DRM+ #3
Oct 28 11:59:18 hp-x360n kernel: [156262.539152] Hardware name: HP HP Spectre
x360 Convertible 13-ap0xxx/8514, BIOS F.33 09/17/2019
Oct 28 11:59:18 hp-x360n kernel: [156262.539153] RIP:
0010:check_flush_dependency+0x9d/0x130
Oct 28 11:59:18 hp-x360n kernel: [156262.539155] Code: 06 00 00 8b b6 c8 04 00
00 48 8d 8b b0 00 00 00 49 89 e8 48 c7 c7 f0 c5 d4 bd 48 89 04 24 c6 05 e6 77
62 01 01 e8 5c 25 fe ff <0f> 0b 48 8b 04 24 eb 10 4c 89 e7 e8 43 73 00 00 41 f6
44 24 25 08
Oct 28 11:59:18 hp-x360n kernel: [156262.539155] RSP: 0018:ffffc05580707918
EFLAGS: 00010086
Oct 28 11:59:18 hp-x360n kernel: [156262.539156] RAX: 0000000000000000 RBX:
ffff9da9cd010c00 RCX: 0000000000000000
Oct 28 11:59:18 hp-x360n kernel: [156262.539157] RDX: 0000000000000063 RSI:
ffffffffbe748dc3 RDI: ffffffffbe74692c
Oct 28 11:59:18 hp-x360n kernel: [156262.539158] RBP: ffffffffc0139000 R08:
ffffffffbe748d60 R09: 0000000000027a00
Oct 28 11:59:18 hp-x360n kernel: [156262.539159] R10: 345d0699392b2cbc R11:
0000000000004712 R12: ffff9da9cc0e2ac0
Oct 28 11:59:18 hp-x360n kernel: [156262.539160] R13: 0000000000000001 R14:
ffff9da9cee67b00 R15: ffff9da8423fa980
Oct 28 11:59:18 hp-x360n kernel: [156262.539161] FS: 0000000000000000(0000)
GS:ffff9da9cef40000(0000) knlGS:0000000000000000
Oct 28 11:59:18 hp-x360n kernel: [156262.539161] CS: 0010 DS: 0000 ES: 0000
CR0: 0000000080050033
Oct 28 11:59:18 hp-x360n kernel: [156262.539162] CR2: 000039df118ed208 CR3:
00000002d39ee004 CR4: 00000000003606e0
Oct 28 11:59:18 hp-x360n kernel: [156262.539163] Call Trace:
Oct 28 11:59:18 hp-x360n kernel: [156262.539166] __flush_work+0x97/0x1d0
Oct 28 11:59:18 hp-x360n kernel: [156262.539168] ? try_to_wake_up+0x38b/0x600
Oct 28 11:59:18 hp-x360n kernel: [156262.539170] ? work_busy+0x90/0x90
Oct 28 11:59:18 hp-x360n kernel: [156262.539171]
__cancel_work_timer+0x103/0x190
Oct 28 11:59:18 hp-x360n kernel: [156262.539173] ? synchronize_irq+0x35/0xa0
Oct 28 11:59:18 hp-x360n kernel: [156262.539185]
gen6_disable_rps_interrupts+0x77/0xa0 [i915]
Oct 28 11:59:18 hp-x360n kernel: [156262.539201] gen6_rps_idle+0x1a/0xd0
[i915]
Oct 28 11:59:18 hp-x360n kernel: [156262.539218] intel_gt_park+0x54/0x60
[i915]
Oct 28 11:59:18 hp-x360n kernel: [156262.539233]
__intel_wakeref_put_last+0x14/0x40 [i915]
Oct 28 11:59:18 hp-x360n kernel: [156262.539249] __engine_park+0x7a/0xc0
[i915]
Oct 28 11:59:18 hp-x360n kernel: [156262.539264]
__intel_wakeref_put_last+0x14/0x40 [i915]
Oct 28 11:59:18 hp-x360n kernel: [156262.539282]
i915_request_retire+0x164/0x350 [i915]
Oct 28 11:59:18 hp-x360n kernel: [156262.539300]
ring_retire_requests+0x4c/0x60 [i915]
Oct 28 11:59:18 hp-x360n kernel: [156262.539334]
i915_retire_requests+0x3d/0x80 [i915]
Oct 28 11:59:18 hp-x360n kernel: [156262.539351] i915_gem_shrink+0x39e/0x550
[i915]
Oct 28 11:59:18 hp-x360n kernel: [156262.539354] ?
__mutex_unlock_slowpath.isra.20+0xbc/0x120
Oct 28 11:59:18 hp-x360n kernel: [156262.539371]
i915_gem_shrinker_scan+0x61/0x110 [i915]
Oct 28 11:59:18 hp-x360n kernel: [156262.539373] do_shrink_slab+0x11f/0x2c0
Oct 28 11:59:18 hp-x360n kernel: [156262.539375] shrink_slab+0xad/0x280
Oct 28 11:59:18 hp-x360n kernel: [156262.539377] shrink_node+0xcc/0x3d0
Oct 28 11:59:18 hp-x360n kernel: [156262.539379] balance_pgdat+0x2a1/0x510
Oct 28 11:59:18 hp-x360n kernel: [156262.539380] kswapd+0x1d6/0x3e0
Oct 28 11:59:18 hp-x360n kernel: [156262.539382] ? wait_woken+0x80/0x80
Oct 28 11:59:18 hp-x360n kernel: [156262.539383] kthread+0x10c/0x130
Oct 28 11:59:18 hp-x360n kernel: [156262.539384] ? balance_pgdat+0x510/0x510
Oct 28 11:59:18 hp-x360n kernel: [156262.539385] ? kthread_park+0x80/0x80
Oct 28 11:59:18 hp-x360n kernel: [156262.539387] ret_from_fork+0x1f/0x30
Oct 28 11:59:18 hp-x360n kernel: [156262.539389] ---[ end trace
bd1306cf8dc03243 ]---[/code]</pre>
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