modload: Cannot allocate memory

[Shi Jie Gung <ksc91u_fr%yahoo.fr@localhost>]

Running NetBSD 5.99.44 (NETBSD_XEN3_DOMU) custom kernel on Debian Unstable, Xen 
4.0.

modload failed with every kmod.

hp_netbsd# cd /stand/amd64/5.99.44/modules/hfs
hp_netbsd# modload  hfs.kmod                                                   
WARNING: module error: Cannot load kernel object `hfs.kmod' error=12
modload: Cannot allocate memory
hp_netbsd# modload hfs                                                         
WARNING: module error: Cannot load kernel object `hfs' error=12
modload: Cannot allocate memory
hp_netbsd# dmesg|tail -n 2
WARNING: module error: Cannot load kernel object `hfs.kmod' error=12
WARNING: module error: Cannot load kernel object `hfs' error=12

On another virtualbox machine, modload also failed with Xen Dom0 kernel, but 
works with standard NetBSD kernel.

I assign 1G ram to netbsd, still the same error.