Re: port-macppc/59177: NetBSD/macppc -current fails to boot on qemu

["Tobias Nygren via gnats" <gnats-admin%NetBSD.org@localhost>]

The following reply was made to PR port-macppc/59177; it has been noted by GNATS.

From: Tobias Nygren <tnn%NetBSD.org@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: Jason Thorpe <thorpej%me.com@localhost>
Subject: Re: port-macppc/59177: NetBSD/macppc -current fails to boot on qemu
Date: Sat, 31 May 2025 12:36:54 +0200

 Since NetBSD 9 boots fine in QEMU, I spent last evening bisecting
 src between 2020 and 2025. Basically following this guide[1] and
 afterwards repetitively swapping out the kernel through a vnd(4) mount.
 
 The first sign of problems appeared February 2021, where we transition
 from a working kernel to one that panics with mutex_vector_enter:
 locking against myself during uvm_fault_internal very early.
 
 This commit sequence is a candidate for when the regression was introduced:
 
 https://mail-index.netbsd.org/source-changes/2021/02/24/msg127234.html
 https://mail-index.netbsd.org/source-changes/2021/02/24/msg127235.html
 https://mail-index.netbsd.org/source-changes/2021/02/24/msg127236.html
 
 [1] https://www.reddit.com/r/BSD/comments/a0re4e/tip_to_install_netbsdmacppc_in_qemusystemppc/