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Another macOS Big Sur Kernel Panic: “mp_kdp_enter() timed-out on cpu 2, NMI-ing”

re: kernel panic

Could Apple please spend some time making macOS more reliable?

After the recent system update a month or so ago, my Mac Pro won’t sleep and my iMac 5K won’t sleep. So both of them sit there burning electricity. Nice 'green' engineering, Apple. They should try putting that reality into their marketing propaganda. And now, yet another kernel panic.

You have to wonder about software quality engineering practices when Apple continues to destabilize the kernel.

If macOS isn’t busy destroying my login, then it’s crashing in the middle of the night, as in last night’s kernel panic while I was sleeping. That’s why a data integrity validation tool like IntegrityChecker Java is good to have around. Kinda nice to know that macOS did not corrupt your data.

I’ve come to despise macOS Big Sur (and Catalina) because of the reliability problems. And now comes macOS Monterey, guaranteed to be worse unless the 8-year trend of more and more problems magically reverses itself. My 2019 iMac 5K with macOS Mojave never crashes, though presumably Apple is working on fixing that.

Maybe we’ll get lucky and the Apple M1 Max and similar CPUs will be more reliable, so we can purchase our way out of the problem by lining the pockets of the executives that perpetuate the problems?

Here’s the kernel panic, involving some kind of non-maskable interupt (NMI). Searching the web, it appears to be both a Mac and PC issue. Does that let Apple off the hook on this one? Dunno.

mp_kdp_enter() timed-out on cpu 2, NMI-ing
mp_kdp_enter() NMI pending on cpus: 0 1 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55
mp_kdp_enter() timed-out during locked wait after NMI;expected 56 acks but received 2 after 11422798 loops in 1246874999 ticks
panic(cpu 2 caller 0xffffff8017d9de91): "IPI timeout, unresponsive CPU bitmap: 0x51, NMIPI acks: 0x0, now: 0x0,
deadline: 565468240884291, pre-NMIPI time: 0x2024a55a133f7,
current: 0x2024a736e9c3d,
global: 1"@/System/Volumes/Data/SWE/macOS/BuildRoots/220e8a1b79/Library/Caches/com.apple.xbs/Sources/xnu/xnu-7195.141.8/osfmk/x86_64/pmap.c:2905
Backtrace (CPU 2), Frame : Return Address
0xffffffa59cb23610 : 0xffffff8017c8d25d 
0xffffffa59cb23660 : 0xffffff8017dd49d3 
0xffffffa59cb236a0 : 0xffffff8017dc4fca 
0xffffffa59cb236f0 : 0xffffff8017c31a2f 
0xffffffa59cb23710 : 0xffffff8017c8ca7d 
0xffffffa59cb23830 : 0xffffff8017c8cd73 
0xffffffa59cb238a0 : 0xffffff801849d8fa 
0xffffffa59cb23910 : 0xffffff8017d9de91 
0xffffffa59cb239d0 : 0xffffff8017da3f6c 
0xffffffa59cb23ab0 : 0xffffff8017da4d56 
0xffffffa59cb23b10 : 0xffffff8017d32f05 
0xffffffa59cb23c60 : 0xffffff8017d32853 
0xffffffa59cb23c90 : 0xffffff8017d2bf61 
0xffffffa59cb23cc0 : 0xffffff8018379671 
0xffffffa59cb23ce0 : 0xffffff80184265a4 
0xffffffa59cb23d40 : 0xffffff8017d826ca 
0xffffffa59cb23d90 : 0xffffff8017c928dd 
0xffffffa59cb23e00 : 0xffffff8017c68c35 
0xffffffa59cb23e60 : 0xffffff8017c803d2 
0xffffffa59cb23ef0 : 0xffffff8017da909d 
0xffffffa59cb23fa0 : 0xffffff8017c32216 
Process name corresponding to current thread: deleted
Mac OS version:
20G224
Kernel version:
Darwin Kernel Version 20.6.0: Tue Oct 12 18:33:42 PDT 2021; root:xnu-7195.141.8~1/RELEASE_X86_64
Kernel UUID: ABC69550-60C2-34FE-B307-C24A8C39309C
KernelCache slide: 0x0000000017a00000
KernelCache base:  0xffffff8017c00000
Kernel slide:      0x0000000017a10000
Kernel text base:  0xffffff8017c10000
__HIB  text base: 0xffffff8017b00000
System model name: MacPro7,1 (Mac-27AD2F918AE68F61)
System shutdown begun: NO
Hibernation exit count: 0
System uptime in nanoseconds: 565469746584522
Last Sleep:           absolute           base_tsc          base_nano
Uptime  : 0x0002024aaf6061a0
Sleep   : 0x0002024819623911 0x000000028335e998 0x000202366755b173
Wake    : 0x000202487c00cced 0x0000000281cc78ae 0x00020248600c86f5
last started kext at 193502017644835: @filesystems.exfat	1.4 (addr 0xffffff7fb349f000, size 53248)
loaded kexts:
...

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