https://bugzilla.kernel.org/show_bug.cgi?id=206987
--- Comment #41 from Jan Kokemüller (jan.kokemuel...@gmail.com) ---
> Looks correct. Care to send out a proper git patch?
Thank you for having a look at the patch! I've sent it to the amd-gfx list.
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--- Comment #40 from Alex Deucher (alexdeuc...@gmail.com) ---
(In reply to Jan Kokemüller from comment #39)
> Created attachment 295225 [details]
> Call DC_FP_START() / DC_FP_END() in dcn21_validate_bandwidth
>
> Could it be that DC_FP_START()/DC
https://bugzilla.kernel.org/show_bug.cgi?id=206987
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--- Comment #38 from Petteri Aimonen (j...@kernelbug.mail.kapsi.fi) ---
@krakopo I must say I don't have any idea what could be happening on your
machine. It could be explained if the kernel thread was being pre-empted, but
pre-emption is disabled
https://bugzilla.kernel.org/show_bug.cgi?id=206987
--- Comment #37 from krak...@protonmail.com ---
I do see ldmxcsr in the disassembly:
81038870 :
81038870: e8 9b 07 03 00 callq 81069010
<__fentry__>
81038875: 48 83 ec 10 sub$0
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--- Comment #36 from Petteri Aimonen (j...@kernelbug.mail.kapsi.fi) ---
@krakopo The 0020 MXCSR value is also exactly like it was for me before the
bug fix. So something is definitely clearing MXCSR after it should be set to
0x1F80 by kernel_f
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--- Comment #35 from krak...@protonmail.com ---
@Petteri
I'm running DragonFly BSD 5.8.1 in my KVM virtual machine.
Here is the dmesg output with the debug info patch applied:
Aug 19 23:18:03 archpad kernel: MXCSR: 0020 XMM3: 401000
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--- Comment #34 from Petteri Aimonen (j...@kernelbug.mail.kapsi.fi) ---
@krakopo Can you apply the debug info patch from here?
https://bugzilla.kernel.org/attachment.cgi?id=289421&action=diff
What kernel are you running inside the KVM virtual mac
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--- Comme
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Cyrax (ev...@hotmail.com) changed:
What|Removed |Added
Status|NEW |RESOLVED
Resolution|-
https://bugzilla.kernel.org/show_bug.cgi?id=206987
--- Comment #31 from Alex Deucher (alexdeuc...@gmail.com) ---
Duplicate of bug 207979.
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--- Comment #30 from Cyrax (ev...@hotmail.com) ---
The patch in https://bugzilla.kernel.org/show_bug.cgi?id=207979 works
beatifully.
19 days heavy usage without system crash on patched 5.7.6 kernel.
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Cyrax (ev...@hotmail.com) changed:
What|Removed |Added
Kernel Version|5.7.0 |5.7.6
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Alexander Kernozhitsky (sh200...@mail.ru) changed:
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--- Comment #28 from Petteri Aimonen (j...@kernelbug.mail.kapsi.fi) ---
@yaomtc Your bug seems to be some separate issue, as the log does not have the
"simd exception" or "mode_support_and_system_configuration" entries in it. It
looks more similar
https://bugzilla.kernel.org/show_bug.cgi?id=206987
--- Comment #27 from yao...@protonmail.com ---
Created attachment 289535
--> https://bugzilla.kernel.org/attachment.cgi?id=289535&action=edit
systemd journal from crash
Update: got a whole system crash again when I was starting up SteamVR. So I
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--- Comment #26 from Cyrax (ev...@hotmail.com) ---
(In reply to Petteri Aimonen from comment #25)
> Looks like there are two kinds of crash bugs here. Many of the amdgpu
> crashes have been fixed in 5.7.0, but the specific one that gives "simd
> e
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--- Comment #25 from Petteri Aimonen (j...@kernelbug.mail.kapsi.fi) ---
Looks like there are two kinds of crash bugs here. Many of the amdgpu crashes
have been fixed in 5.7.0, but the specific one that gives "simd exception" in
dmesg is not.
@Cyr
https://bugzilla.kernel.org/show_bug.cgi?id=206987
--- Comment #24 from Cyrax (ev...@hotmail.com) ---
(In reply to Petteri Aimonen from comment #16)
> I hit the same issue, using Ubuntu 20.04. It happened when switching window
> to Firefox. For me it only crashed Xorg, ssh to the machine still wor
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--- Comment #23 from Cyrax (ev...@hotmail.com) ---
Created attachment 289483
--> https://bugzilla.kernel.org/attachment.cgi?id=289483&action=edit
used decode_stacktrace.sh to previous dmesg log
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Cyrax (ev...@hotmail.com) changed:
What|Removed |Added
Kernel Version|5.7.0-rc3 |5.7.0
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--- Comment #22 from Cyrax (ev...@hotmail.com) ---
Created attachment 289481
--> https://bugzilla.kernel.org/attachment.cgi?id=289481&action=edit
config file used to build kernel 5.7.0 with KASAN etc
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--- Comment #21 from Cyrax (ev...@hotmail.com) ---
Created attachment 289479
--> https://bugzilla.kernel.org/attachment.cgi?id=289479&action=edit
dmesg output kernel 5.7.0
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--- Comment #19 from Alex Deucher (alexdeuc...@gmail.com) ---
Do these patches help?
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=59dfb0c64d3853d20dc84f4561f28d4f5a2ddc7d
https://git.kernel.org/pub/scm/linux/kernel
https://bugzilla.kernel.org/show_bug.cgi?id=206987
--- Comment #18 from Petteri Aimonen (j...@kernelbug.mail.kapsi.fi) ---
As best as I can tell, the crash seems to be caused by some floating point
exception (such as underflow/overflow) in this function call in dcn_calc_auto.c
line 176:
dcn_bw_ce
https://bugzilla.kernel.org/show_bug.cgi?id=206987
--- Comment #17 from Petteri Aimonen (j...@kernelbug.mail.kapsi.fi) ---
Created attachment 289381
--> https://bugzilla.kernel.org/attachment.cgi?id=289381&action=edit
dmesg from kernel 5.4.0-31
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Petteri Aimonen (j...@kernelbug.mail.kapsi.fi) changed:
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--- Comment #15 from Cyrax (ev...@hotmail.com) ---
Created attachment 289241
--> https://bugzilla.kernel.org/attachment.cgi?id=289241&action=edit
dump of struct dcn_bw_internal_vars
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--- Comment #14 from Cyrax (ev...@hotmail.com) ---
Created attachment 289239
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backtrace created by executing bt -f command in crash utility
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--- Comment #13 from Cyrax (ev...@hotmail.com) ---
Created attachment 289237
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kernel log dumped from crash dump by using crash utility
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--- Comment #12 from Cyrax (ev...@hotmail.com) ---
Created attachment 288873
--> https://bugzilla.kernel.org/attachment.cgi?id=288873&action=edit
dmesg from 5.6.8
Additionally dmesg output shows this line : note: kworker/0:3[2251663] exited
wit
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Cyrax (ev...@hotmail.com) changed:
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Kernel Version|5.6.7 |5.7.0-rc3
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--- Comment #11 from Cyrax (ev...@hotmail.com) ---
Created attachment 288781
--> https://bugzilla.kernel.org/attachment.cgi?id=288781&action=edit
dmesg output from Linux 5.7-rc3
This is starting to be real problem, I can't do anything remotely
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Cyrax (ev...@hotmail.com) changed:
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Kernel Version|5.6.5 |5.6.7
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--- Comment #10 from Cyrax (ev...@hotmail.com) ---
Created attachment 288719
--> https://bugzilla.kernel.org/attachment.cgi?id=288719&action=edit
gdb disassembler dump around mode_support_and_system_configuration
And it happened again. Looks li
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Cyrax (ev...@hotmail.com) changed:
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Kernel Version|5.6.4 |5.6.5
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--- Comment #9 from Cyrax (ev...@hotmail.com) ---
Created attachment 288679
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dmesg output
And again.
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--- Comment #8 from farmb...@googlemail.com ---
Created attachment 288615
--> https://bugzilla.kernel.org/attachment.cgi?id=288615&action=edit
smesg output
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--- Comment #6 from Cyrax (ev...@hotmail.com) ---
Created attachment 288595
--> https://bugzilla.kernel.org/attachment.cgi?id=288595&action=edit
dmesg output
And another one. It seems that switching between virtual consoles causes this
bug to h
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Cyrax (ev...@hotmail.com) changed:
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Kernel Version|5.5.13 |5.6.4
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--- Comment #5 from Cyrax (ev...@hotmail.com) ---
Oh and kernel is in 5.5.13 version.
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Cyrax (ev...@hotmail.com) changed:
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Kernel Version|5.5.11 |5.5.13
Regression|No
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--- Comment #4 from Cyrax (ev...@hotmail.com) ---
Created attachment 288203
--> https://bugzilla.kernel.org/attachment.cgi?id=288203&action=edit
dmesg output 2
This crash happened again. In that time I have used VLC, played a game (GZDoom)
and
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--- Comment #3 from Cyrax (ev...@hotmail.com) ---
GCC is "gcc (Arch Linux 9.3.0-1) 9.3.0"
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--- Comment #2 from Cyrax (ev...@hotmail.com) ---
Created attachment 288079
--> https://bugzilla.kernel.org/attachment.cgi?id=288079&action=edit
dmesg output
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Alex Deucher (alexdeuc...@gmail.com) changed:
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