On 01/07/26 at 04:43pm, Tj wrote:
> Currently debugging a KEXEC_JUMP preserve_context panic with amd iommu on
> kexec restart.
CC David to see if he knows this.
>
> However, during shutdown, all but the bootstrap core (BSC) generate this
> message. Is it something that {c,sh}ould be silenced if the BSC CPU holds the
> lock (as I presume), or is it indicating a real problem because the elfheader
> cannot be updated? My limited understanding would suggest this should be
> ignored silently. From scanning the code it seems to suggest this is intended
> for sysfs directed CPU hotplug events.
>
> [ 141.722644] shutdown[1]: Rebooting with kexec.
> [ 141.781931] Freezing user space processes
> [ 141.787032] Freezing user space processes completed (elapsed 0.001 seconds)
> [ 141.794028] OOM killer disabled.
> [ 141.802428] pn533_usb 5-4.4:1.0: NFC: NXP PN533 NFC device disconnected
> [ 142.726967] amdgpu 0000:0a:00.0: amdgpu: VCE busy: VCE_STATUS=0x100,
> SRBM_STATUS2=0x0
> [ 142.966113] amdgpu 0000:0a:00.0: amdgpu: PCI CONFIG reset
> [ 142.975667] Disabling non-boot CPUs ...
> [ 143.004683] smpboot: CPU 15 is now offline
> [ 143.008793] crash hp: kexec_trylock() failed, kdump image may be inaccurate
> [ 143.052741] smpboot: CPU 14 is now offline
> [ 143.056894] crash hp: kexec_trylock() failed, kdump image may be inaccurate
> [ 143.088716] smpboot: CPU 13 is now offline
> [ 143.092840] crash hp: kexec_trylock() failed, kdump image may be inaccurate
> [ 143.132714] smpboot: CPU 12 is now offline
> [ 143.136857] crash hp: kexec_trylock() failed, kdump image may be inaccurate
> [ 143.160668] smpboot: CPU 11 is now offline
> [ 143.164827] crash hp: kexec_trylock() failed, kdump image may be inaccurate
> [ 143.184791] smpboot: CPU 10 is now offline
> [ 143.188924] crash hp: kexec_trylock() failed, kdump image may be inaccurate
> [ 143.208671] smpboot: CPU 9 is now offline
> [ 143.212736] crash hp: kexec_trylock() failed, kdump image may be inaccurate
> [ 143.236943] smpboot: CPU 8 is now offline
> [ 143.241005] crash hp: kexec_trylock() failed, kdump image may be inaccurate
> [ 143.248682] Spectre V2 : Update user space SMT mitigation: STIBP off
> [ 143.280790] smpboot: CPU 7 is now offline
> [ 143.284839] crash hp: kexec_trylock() failed, kdump image may be inaccurate
> [ 143.316796] smpboot: CPU 6 is now offline
> [ 143.320844] crash hp: kexec_trylock() failed, kdump image may be inaccurate
> [ 143.352805] smpboot: CPU 5 is now offline
> [ 143.356853] crash hp: kexec_trylock() failed, kdump image may be inaccurate
> [ 143.432608] smpboot: CPU 4 is now offline
> [ 143.436642] crash hp: kexec_trylock() failed, kdump image may be inaccurate
> [ 143.468682] smpboot: CPU 3 is now offline
> [ 143.472720] crash hp: kexec_trylock() failed, kdump image may be inaccurate
> [ 143.512698] smpboot: CPU 2 is now offline
> [ 143.516743] crash hp: kexec_trylock() failed, kdump image may be inaccurate
> [ 143.536710] smpboot: CPU 1 is now offline
> [ 143.540794] crash hp: kexec_trylock() failed, kdump image may be inaccurate
> [ 143.548516] Calling amd_iommu_syscore_data_set+0x0/0x40
> [ 143.553761] Checking wakeup interrupts
> [ 143.557519] Calling kvm_suspend+0x0/0x30 [kvm]
> [ 143.562023] Calling mce_syscore_suspend+0x0/0x30
> [ 143.566655] Calling ledtrig_cpu_syscore_suspend+0x0/0x20
> [ 143.571981] Calling timekeeping_syscore_suspend+0x0/0x10
> [ 143.577331] Calling irq_gc_suspend+0x0/0x80
> [ 143.581526] Calling ioapic_suspend+0x0/0x10
> [ 143.585853] Calling i8259A_suspend+0x0/0x30
> [ 143.590049] Calling perf_ibs_suspend+0x0/0x40
> [ 143.594423] Calling amd_iommu_suspend+0x0/0x20
> [ 143.598895] Calling fw_suspend+0x0/0x20
> [ 143.602743] Calling acpi_save_bm_rld+0x0/0x30
> [ 143.607118] Calling lapic_suspend+0x0/0x160
> [ 0.000000] Linux version 6.19.0-rc3+debian+tj ([email protected]) (gcc (Debian
> 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40) #364 SMP
> PREEMPT_DYNAMIC Wed Jan 7 12:46:49 UTC 2026
> [ 0.000000] Command line: root=/dev/mapper/SUNNY-rootfs ro debug
> systemd.log_level=info drm.edid_firmware=DP-2:edid/UE50NU7400.edid
> fbcon=rotate:3 modprobe.blacklist=radeon amdgpu.si_support=1
> console=ttyS0,115200 console=tty0 no_console_suspend nosplash vt.handoff=7
> pm_debug_messages=1 "dyndbg=file syscore.c +p" elfcorehdr=1032176K
> kexec_jump_back_entry=0x00000001ff34012b
>
> $ grep KEXEC /boot/config-$(uname -r)
> CONFIG_KEXEC_CORE=y
> CONFIG_HAVE_IMA_KEXEC=y
> CONFIG_KEXEC=y
> CONFIG_KEXEC_FILE=y
> CONFIG_KEXEC_SIG=y
> # CONFIG_KEXEC_SIG_FORCE is not set
> CONFIG_KEXEC_BZIMAGE_VERIFY_SIG=y
> CONFIG_KEXEC_JUMP=y
> CONFIG_KEXEC_HANDOVER=y
> # CONFIG_KEXEC_HANDOVER_DEBUG is not set
> CONFIG_KEXEC_HANDOVER_DEBUGFS=y
> # CONFIG_KEXEC_HANDOVER_ENABLE_DEFAULT is not set
> CONFIG_ARCH_SUPPORTS_KEXEC=y
> CONFIG_ARCH_SUPPORTS_KEXEC_FILE=y
> CONFIG_ARCH_SELECTS_KEXEC_FILE=y
> CONFIG_ARCH_SUPPORTS_KEXEC_PURGATORY=y
> CONFIG_ARCH_SUPPORTS_KEXEC_SIG=y
> CONFIG_ARCH_SUPPORTS_KEXEC_SIG_FORCE=y
> CONFIG_ARCH_SUPPORTS_KEXEC_BZIMAGE_VERIFY_SIG=y
> CONFIG_ARCH_SUPPORTS_KEXEC_JUMP=y
> CONFIG_ARCH_SUPPORTS_KEXEC_HANDOVER=y
> # CONFIG_IMA_KEXEC is not set
> # CONFIG_TEST_KEXEC_HANDOVER is not set
>
> Thanks for looking at this.
>
> Tj.
>
