Comment # 2 on bug 1201867 from Fabian Vogt

(In reply to Chester Lin from comment #1)
> (In reply to Fabian Vogt from comment #0)
> > AArch64 only. Kernel logs say:
> > 
> > [   66.889582] sysrq: Trigger a crash
> > [   66.889826] Kernel panic - not syncing: sysrq triggered crash
> > [   66.890195] CPU: 0 PID: 4256 Comm: bash Kdump: loaded Tainted: G         
> > N 5.3.18-150300.59.81-default #1 SLE15-SP3
> > [   66.890902] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015
> > [   66.891338] Call trace:
> > [   66.891502]  dump_backtrace+0x0/0x1c0
> > [   66.891737]  show_stack+0x24/0x30
> > [   66.891954]  dump_stack+0xb0/0xdc
> > [   66.892184]  panic+0x148/0x364
> > [   66.892396]  sysrq_handle_crash+0x1c/0x20
> > [   66.892668]  __handle_sysrq+0xb0/0x1b0
> > [   66.892943]  write_sysrq_trigger+0x70/0x88
> > [   66.893223]  proc_reg_write+0x78/0xd0
> > [   66.893474]  __vfs_write+0x48/0x80
> > [   66.893708]  vfs_write+0xac/0x1c8
> > [   66.893936]  ksys_write+0x74/0xf8
> > [   66.894163]  __arm64_sys_write+0x24/0x30
> > [   66.894432]  el0_svc_common.constprop.0+0x84/0x218
> > [   66.895025]  el0_svc_handler+0x34/0x90
> > [   66.895483]  el0_svc+0x10/0x540
> > [   66.926829] Starting crashdump kernel...
> > [   66.927353] Bye!
> > 
> > Kernel 5.3.18-150300.59.76 works
> > (https://openqa.opensuse.org/tests/2471490#step/kdump_and_crash/50),
> > 5.3.18-150300.59.81 does not
> > (https://openqa.opensuse.org/tests/2472635#step/kdump_and_crash/45)
> > 
> > ## Observation
> > 
> > openQA test in scenario
> > opensuse-15.3-JeOS-for-AArch64-aarch64-jeos-extra@USBboot_aarch64 fails in
> > [kdump_and_crash](https://openqa.opensuse.org/tests/2481397/modules/
> > kdump_and_crash/steps/48)
> > 
> > ## Test suite description
> > Same as jeos, plus some more tests.
> > 
> > 
> > ## Reproducible
> > 
> > Fails since (at least) Build
> > [9.556](https://openqa.opensuse.org/tests/2472150)
> > 
> > 
> > ## Expected result
> > 
> > Last good: [9.555](https://openqa.opensuse.org/tests/2471490) (or more
> > recent)
> > 
> > 
> > ## Further details
> > 
> > Always latest result in this scenario:
> > [latest](https://openqa.opensuse.org/tests/
> > latest?arch=aarch64&distri=opensuse&flavor=JeOS-for-
> > AArch64&machine=USBboot_aarch64&test=jeos-extra&version=15.3)
> 
> It seems to be duplicated of bsc#1201645, could you try removing the "quiet"
> parameter from the kernel command line and then adding the following kernel
> parameter in order to see if this bsc may have the same issue in the crash
> kernel? Thanks.
> 
> earlycon=pl011,mmio,0x9000000

Confirmed. The one which I debugged over a year ago and supposedly fixed almost
for that long...

*** This bug has been marked as a duplicate of bug 1201645 ***