panic: kmem_malloc boot error w/ 6.2

[Pekka Savola]

Hello,

(Not subscribed, let's hope this gets through..)

I saw the strangest case I've yet seen today when upgrading a dual-P3 
system using sources (buildworld etc.) from FreeBSD 5.5 to RELENG_6 
(6.2).  The system paniced at boot with a message like:

panic: kmem_malloc(-1059844096): kmem_map too small: 2990080 total allocated

This seemed to be just before one would mount the root filesystem.

GENERIC kernel on 6.2-RELEASE boot CD worked though.  FreeSBIE 2.0 
kernel (6.2-RELEASE) panicked in the same way, as well as another 
Rescue CD based on FreeBSD 6.1.

I did a fair bit of bisecting (about 10 compiles) to find out which 
feature in GENERIC removes this panic, and came to a suprising 
conclusion:

   makeoptions DEBUG=-g

.. when I added this, boot works fine.  When removing it, you get the 
panic.

Strange, huh? :-/


Below is a snippet of the boot log:
...
acd0: DVDROM <TEAC DVD-ROM DV-28E-C/D.4B> at ata0-master UDMA33
afd0: 6869804134400MB <VIRTUALFLOPPY DRIVE Floppy > at ata2-master PIO3
acd1: CDROM <VIRTUALCDROM DRIVE/> at ata2-slave PIO3
amr0: delete logical drives supported by controller
amrd0: <LSILogic MegaRAID logical drive> on amr0
amrd0: 139900MB (286515200 sectors) RAID 1 (optimal)
panic: kmem_malloc(-1059844096): kmem_map too small: 2990080 total allocated
Uptime: 2s
Cannot dump. No dump device defined.
Automatic reboot in 15 seconds - press a key on the console to abort

-- 
Pekka Savola                 "You each name yourselves king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings