Subject: Re: KASAN debug kernel fails to boot at early stage when CONFIG_SMP=y is set (kernel 6.5-rc5, PowerMac G4 3,6)

From: Erhard Furtner <[email-masked]>
Date: Tue, 15 Aug 2023 22:01:56 +0200

On Tue, 15 Aug 2023 17:25:13 +0000
Christophe Leroy <[email-masked]> wrote:

> I just sent a patch with additional pr_info() in order to help locate 
> the issue, please provide output with that patch.
> 
> Thanks
> Christophe

Thanks for your efforts Christophe! With the patch applied I get this output + a blank black line:

[    0.000000] printk: bootconsole [udbg0] enabled
[    0.000000] Total memory = 2048MB; using 4096kB for hash table
[    0.000000] mapin_ram:125
[    0.000000] mmu_mapin_ram:169 0 30000000 1400000 2000000
[    0.000000] __mmu_mapin_ram:146 0 1400000
[    0.000000] __mmu_mapin_ram:155 1400000
[    0.000000] __mmu_mapin_ram:146 1400000 30000000
[    0.000000] __mmu_mapin_ram:155 20000000
[    0.000000] __mapin_ram_chunk:107 20000000 30000000
[    0.000000] __mapin_ram_chunk:117
[    0.000000] mapin_ram:134
[    0.000000] btext_unmap:129

Afterwards the freeze. On a warm boot after booting another kernel the output continues with "[    0.000000] btext_unmap:131" instead of the black line. Full dmesg of a warm boot attached.

Regards,
Erhard