[Bug 201847] nouveau 0000:01:00.0: fifo: fault 01 [WRITE] at 000000000a721000 engine 00 [GR] client 0f [GPC0/PROP_0] reason 82 [] on channel 4 [00ff85c000 X[3819]]

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=201847

--- Comment #1 from Marc B. (kernel.org@marc.ngoe.de) ---
It would be soooo cool if anyone would actually read this bug report and maybe
try to fix it. I will assist in testing patches until this is resolved.

And: I am willing to offer $100 for fixing this annoying bug! Keeps freezing my
4.19.39 kernel out of nowhere.

Some things I would like to get into discussion:

a) - it might have something to do with memory pressure

_and_

b)
- high CPU load
_or_
- high number of context switches.

For the latter I'm not sure. The bug actually always occurs when I ie. compile
two kernels at -j24 and habe some other work besides this, say a YT video. The
bug is, however, definitely triggered by a graphics event, ie.
resizing/creating a window, scrolling a Web page or watching a video.


[2019-05-04 15:43:24] err kern 03 kernel : [  523.906459] nouveau 0000:01:00.0:
fifo: SCHED_ERROR 0a [CTXSW_TIMEOUT]
[2019-05-04 15:43:24] notice kern 05 kernel : [  523.906467] nouveau
0000:01:00.0: fifo: runlist 0: scheduled for recovery
[2019-05-04 15:43:24] notice kern 05 kernel : [  523.906473] nouveau
0000:01:00.0: fifo: channel 2: killed
[2019-05-04 15:43:24] notice kern 05 kernel : [  523.906479] nouveau
0000:01:00.0: fifo: engine 0: scheduled for recovery
[2019-05-04 15:43:24] warning kern 04 kernel : [  523.906789] nouveau
0000:01:00.0: X[8006]: channel 2 killed!
[2019-05-04 15:43:24] err kern 03 kernel : nouveau 0000:01:00.0: fifo:
SCHED_ERROR 0a [CTXSW_TIMEOUT]
[2019-05-04 15:43:24] notice kern 05 kernel : nouveau 0000:01:00.0: fifo:
runlist 0: scheduled for recovery
[2019-05-04 15:43:24] notice kern 05 kernel : nouveau 0000:01:00.0: fifo:
channel 2: killed
[2019-05-04 15:43:24] notice kern 05 kernel : nouveau 0000:01:00.0: fifo:
engine 0: scheduled for recovery
[2019-05-04 15:43:24] warning kern 04 kernel : nouveau 0000:01:00.0: X[8006]:
channel 2 killed!
[2019-05-04 15:44:24] info kern 06 kernel : [  584.121331] sysrq: SysRq :
Keyboard mode set to system default
[2019-05-04 15:44:24] info kern 06 kernel : sysrq: SysRq : Keyboard mode set to
system default

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