Closed dwrobison closed 7 years ago
The printfs are warnings. The crash is in a callout. Without a core or at least a backtrace in ddb there's no reason to attribute the panic to drm.
Didn't get a core as it froze the system completely. Happened twice but the second time I didn't snap photos. I'll try again next time it happens to see if I can get a core dump.
Read the wiki for how to improve your odds of getting a core. Trueos does a number of things that reduce debuggability.
matt, what options would help in TrueOS to make debugging easier? Besides enabling coredumps? ;)
not to speak for matt here since he's def the domain expert but we've found that upgrading to dwarf4 is helpful:
also these sysctl knobs have def helped me:
debug.debugger_on_panic="0" dev.drm.skip_ddb="1"
there may be other knobs we can tune now but this did help me squash some skylake issues a while back.
cheers, -pete
On Tue, Oct 4, 2016 at 1:19 PM, Kris Moore notifications@github.com wrote:
matt, what options would help in TrueOS to make debugging easier? Besides enabling coredumps? ;)
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pete wright www.nycbug.org @nomadlogicLA
I actually haven't found DWARF4 to be that useful for the kernel :(. I'm actually thinking of KDB/DDB as features that would be useful to have in 12.
Ah! I'll pull that misinfo from the wiki then :)
-p
On Tue, Oct 4, 2016 at 2:08 PM, Matthew Macy notifications@github.com wrote:
I actually haven't found DWARF4 to be that useful for the kernel :(. I'm actually thinking of KDB/DDB as features that would be useful to have in 12.
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pete wright www.nycbug.org @nomadlogicLA
Well folks, at any rate here is my dmesg as it may help posterity at some point.
Copyright (c) 1992-2016 The FreeBSD Project.
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FreeBSD 12.0-CURRENT #9 1b52c82(drm-next-4.7): Mon Sep 12 21:06:48 UTC 2016
root@gauntlet:/usr/obj/usr/src/sys/GENERIC amd64
clang version 3.8.1 (tags/RELEASE_381/final)
VT(vga): resolution 640x480
CPU: Intel(R) Core(TM) i5 CPU M 520 @ 2.40GHz (2394.06-MHz K8-class CPU)
Origin="GenuineIntel" Id=0x20652 Family=0x6 Model=0x25 Stepping=2
Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
Features2=0x298e3ff<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,SSE4.2,POPCNT,AESNI>
AMD Features=0x28100800<SYSCALL,NX,RDTSCP,LM>
AMD Features2=0x1
Ahh - this is pre-SB. In that case it probably is DRM. I'll pull out my ancient Dell to see if I can reproduce.
Yes my trusty Dell E6510 laptop.
Thanks for the time and attention.
Ok, I've enabled DDB now (KDB was already there)
Had 3 or 4 more of these crashes. Usually after I leave kodi up for hours.
Got this error last night but no crash:
Oct 25 21:50:16 lefty kernel: [drm:0xffffffff82b47687s] ERROR Atomic update failure on pipe A (start=672137 end=672138) time 0 us, min 894, max 899, scanline start 893, end 899 Oct 26 00:36:21 lefty kernel: [drm:0xffffffff82b47687s] ERROR Atomic update failure on pipe A (start=1270023 end=1270024) time 0 us, min 894, max 899, scanline start 893, end 900
Hi,
Can you re-test with the latest drm-next?
--HPS
Running TrueOS 12.x:
FreeBSD lefty 12.0-CURRENT FreeBSD 12.0-CURRENT #9 1b52c82(drm-next-4.7): Mon Sep 12 21:06:48 UTC 2016 root@gauntlet:/usr/obj/usr/src/sys/GENERIC amd64
Running VirtualBox and Kodi, got this page fault.
Can't upload my poor quality images. Here's two links:
http://flag.blackened.net/daver/freebsd/dump_1.JPG http://flag.blackened.net/daver/freebsd/dump_2.JPG