[Apt-Rpm] Couldn't make mmap of 25165825 bytes - mmap (22 Invalid argument)

[Bernhard Rosenkraenzer]

Hi,
I just tried installing apt (current git) on an OLPC - apt-get 
update fetches the package lists as expected, but then 
barfs:

E: Couldn't make mmap of 25165825 bytes - mmap (22 
Invalid argument)
W: Unable to munmap
E: The package lists or status file could not be parsed or 
opened

It doesn't seem to be an out of memory problem - 29 MB 
free + 149 MB buffers/cache, and adding a swap file doesn't 
change anything.

Any idea what's going on there? OLPC's / filesystem is on 
jffs2, maybe there's a problem with mmap-ing files on that 
fs? (but in that case, shouldn't apt-pkg/contrib/mmap.cc do 
what it says in the comment at the top of the file, and 
provide a faked mmap using read()?)

ttyl
bero