linprocfs Input/output error

[Fernando Apesteguía]

Hi all, I post here cause I didn't get any answers in freebsd-emulation.

In 8.0-RELEASE-p1 if I try to execute this:

cat /compat/linux/proc/cpuinfo > ~/cpuinfo.txt

I get

cat: /compat/linux/proc/cpuinfo: Input/output error

truss shows the read system call returns ERR#5. It is the same with
other files from linprocfs.

cat /compat/linux/proc/[any_file] works fine

What am I missing?

Thanks in advance