Re: EFI RT page fault in init pid = 1

On Fri, Jan 03, 2025 at 06:43:55PM -0500, Dennis Clarke wrote:
> 
> I wonder if anyone else has seen such a message at shutdown :
> 
> 
> 
> Fatal trap 12: page fault while in kernel mode
> cpuid = 0; apic id = 00
> fault virtual address   = 0x0
> fault code              = supervisor read data, page not present
> instruction pointer     = 0x20:0x7c38f87a
> stack pointer           = 0x28:0xfffffe035500bba8
> frame pointer           = 0x28:0x5
> code segment            = base 0x0, limit 0xfffff, type 0x1b
>                         = DPL 0, pres 1, long 1, def32 0, gran 1
> processor eflags        = interrupt enabled, resume, IOPL = 0
> current process         = 1 (init)
> rdi: fffffe035500bcd8 rsi: 0000000000000004 rdx: 0000000000000000
> rcx: 0000000000000000  r8: 0000000000000000  r9: 0000000000000000
> rax: 00000000800b0040 rbx: 0000000000000002 rbp: 0000000000000005
> r10: 00000000800b0000 r11: 0000000000000000 r12: fffff80103969000
> r13: fffff80101c57140 r14: 0000000000004008 r15: fffff801019895a8
> trap number             = 12
> EFI RT page fault
> acpi0: Powering system off
> 
> I have not seen such a thing while the machine was running.
> 
> Machine in question is 15.0-CURRENT :
The reporting of the faults during the calls into EFI RT was added recently.
Before that, such faults were silently ignored.  Now, the report is printed
and then the fault is ignored.

There is no actionable items for users; a developer might be interested.