Re: port-macppc/58320: NetBSD/macppc 10.0 INSTALL kernel stalls on Power Mac G4

[Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>]

The following reply was made to PR port-macppc/58320; it has been noted by GNATS.

From: Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: thorpej%NetBSD.org@localhost, tsutsui%ceres.dti.ne.jp@localhost
Subject: Re: port-macppc/58320: NetBSD/macppc 10.0 INSTALL kernel stalls on
	 Power Mac G4
Date: Thu, 13 Jun 2024 04:39:48 +0900

 > Maybe we have to check macppc VM changes?
 
 git bisect shows:
 
 ---
 7d632b8ba47400f8dd90e2764265a9747c581aca is the first bad commit
 commit 7d632b8ba47400f8dd90e2764265a9747c581aca
 Author: thorpej <thorpej%NetBSD.org@localhost>
 Date:   Wed Feb 24 16:42:38 2021 +0000
 
     Add a provision for a per-cpu battable.  Each CPU starts with the global
     one, but this allows CPUs to temporarily switch to an alternate battable
     if needed.
 
  sys/arch/powerpc/include/cpu.h       |  6 +++++-
  sys/arch/powerpc/oea/cpu_subr.c      | 12 ++++++++----
  sys/arch/powerpc/oea/genassym.cf     |  3 ++-
  sys/arch/powerpc/powerpc/trap_subr.S | 26 +++++++++++++++++++-------
  4 files changed, 34 insertions(+), 13 deletions(-)
 ---
 
 I.e. the following commit causes this ATI Rage128 genfb(4) problem:
  https://github.com/NetBSD/src/commit/7d632b8ba47400f8dd90e2764265a9747c581aca
  https://mail-index.netbsd.org/source-changes/2021/02/24/msg127234.html
  http://www.execsw.org/netbsd/changeset.cgi?id=20210224T164238Z.40f74c2f3ab23c266a2191d7d79f3c29dcf90b7d
 
 Jason, could you take a look at this?
 
 Thanks,
 ---
 Izumi Tsutsui