Re: port-macppc/54331: macppc MP kernels fail to boot successfully in -current (8.99.49)

["David H. Gutteridge" <david%gutteridge.ca@localhost>]

The following reply was made to PR port-macppc/54331; it has been noted by GNATS.

From: "David H. Gutteridge" <david%gutteridge.ca@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: port-macppc/54331: macppc MP kernels fail to boot successfully
 in -current (8.99.49)
Date: Sun, 07 Jul 2019 17:43:54 -0400

 This is different than I thought, there are actually two separate
 issues involved. The failure to successfully boot an MP kernel can be
 duplicated with 8.1_STABLE: when DEBUG and DIAGNOSTIC are enabled, I
 get a very similar initial backtrace, and the exact same behaviour
 (and, from what I can see, output) before the machine reboots. I hadn't
 previously tried a debugging kernel with 8.x, since it otherwise works
 fine for me. So this isn't a regression with -current, it's pre-
 existing.
 
 With -current, the distinction is a non-debug MP kernel fails to
 complete booting. It hangs before running /sbin/init. It continues to
 process hardware-related events (e.g., I can unplug and plug in USB
 devices, and it continues to handle these correctly), but otherwise
 just stalls, without any output to indicate why.
 
 So, perhaps in order to answer why the -current non-debug MP kernel
 isn't working, we need to figure out why MP debug kernels aren't
 working first.
 
 Dave