O_DIRECT and bigphysarea

[Kipp Aldrich <kippa@xxxxxxxxxxxxxxxxxx>]

Is it possible to read/write an xfs file opened with O_DIRECT to a 
buffer obtained via bigphysarea? I have tried this and get "Bad Address" 
errors. Buffers obtained via regular alloc methods work fine. The 
bigphysarea buffers are correctly mmap'ed into user space, and show in 
/proc/<pid>/maps. So, the question is can I do xfs O_DIRECT on 
reads/writes to bigphysarea buffers?

Thanks. I am running 2.6 (2.6.21-rc3, from sgi cvs).

Kipp
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Kipp A. Aldrich