Re: kern/46885: NetBSD 6.0_RC1 spontaneously reboots as kernel starts to load

["Valeriy E. Ushakov" <uwe%stderr.spb.ru@localhost>]

The following reply was made to PR kern/46885; it has been noted by GNATS.

From: "Valeriy E. Ushakov" <uwe%stderr.spb.ru@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: kern/46885: NetBSD 6.0_RC1 spontaneously reboots as kernel starts 
to load
Date: Mon, 3 Sep 2012 01:12:55 +0400

 On Sun, Sep 02, 2012 at 15:25:02 +0000, Valeriy E. Ushakov wrote:
 
 >  This and port-i386/46061 look (at least at the first glance) similar
 >  to what I see with VBox.  I have a bit out of date current tree, from
 >  mid-July or so.  A GENERIC kernel with some more stuff added to it
 >  (PCIVERBOSE and some more) would not boot, getting stuck in an endless
 >  trap loop pretty early in uvm init.  Trimming the kernel size a bit
 >  would make it boot.  Now, this well may be a VBox bug, but I wonder if
 >  you can try to boot a trimmed kernel config on your machine to see if
 >  it boots (unfortunately I will only be able to test this myself on
 >  real hardware in a few days from now).
 
 I did a few more experiments under vbox --recompile-supervisor
 (i.e. ~= qemu interpreter) and it looks sensitive to size.
 
 Playing with the following config:
 
 
   include     "arch/i386/conf/GENERIC"
   options     PCIVERBOSE
 
   # this line has 64 bytes ######################################
   ###############################################################
   ###############################################################
   ...
 
 I do get bootable kernel without those comment lines added to beef up
 the kernel size.  With 12KB worth of comments I get unbootable kernel.
 With 16KB it's bootable again.  Current current will probably have
 different numbers, but you get the idea.
 
 -uwe