[Bug 285797] EFI RT page fault message printed every 30 seconds

From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 31 Mar 2025 03:58:21 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=285797

            Bug ID: 285797
           Summary: EFI RT page fault message printed every 30 seconds
           Product: Base System
           Version: 14.2-STABLE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: bakul@iitbombay.org

At exactly every 30 minutes I see a message like the one below. This started on
February 27 or so, The kernel was built from sources with git commit
f183965bb8f5. Someone (vexeduxr) oh the discord server said this behavior went
in on Jan 1. If this was changed to diagnose some EFI RT issues, it should be
made conditional, to be enabled by setting a sysctl.


Mar 30 20:35:25 server1 syslogd: last message repeated 1 times
Mar 30 20:35:25 server1 kernel: Fatal trap 12: page fault while in kernel mode
Mar 30 20:35:25 server1 kernel: cpuid = 0; apic id = 00
Mar 30 20:35:25 server1 kernel: fault virtual address   = 0xdb477f60
Mar 30 20:35:25 server1 kernel: fault code              = supervisor read data,
page not present
Mar 30 20:35:25 server1 kernel: instruction pointer     = 0x20:0xdce686f1
Mar 30 20:35:25 server1 kernel: stack pointer           =
0x28:0xfffffe0113a62c50
Mar 30 20:35:25 server1 kernel: frame pointer           = 0x28:0x1
Mar 30 20:35:25 server1 kernel: code segment            = base 0x0, limit
0xfffff, type 0x1b
Mar 30 20:35:25 server1 kernel:                         = DPL 0, pres 1, long
1, def32 0, gran 1
Mar 30 20:35:25 server1 kernel: processor eflags        = interrupt enabled,
resume, IOPL = 0
Mar 30 20:35:25 server1 kernel: current process         = 0 (thread taskq)
Mar 30 20:35:25 server1 kernel: rdi: fffffe0113a62d18 rsi: fffff80001cf4c60
rdx: 0000000000000071
Mar 30 20:35:25 server1 kernel: rcx: fffffe0113a62de8  r8: 0000000000000001 
r9: 00000000000007e9
Mar 30 20:35:25 server1 kernel: rax: 0000000000000026 rbx: fffffe0113a62de8
rbp: 0000000000000001
Mar 30 20:35:25 server1 kernel: r10: 000000000000001e r11: 00000000db477f48
r12: fffff80001cfc758
Mar 30 20:35:25 server1 kernel: r13: 0000000000000000 r14: fffffe0113a62e20
r15: fffffe0113a62dc0
Mar 30 20:35:25 server1 kernel: trap number             = 12
Mar 30 20:35:25 server1 kernel: EFI RT page fault

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