ggate and mmap, possible problem?

Hi! Is it possible that there is some sort of problem using mmap on a (UFS2)
filesystem mounted over ggate?

I keep getting errors on the console when I enable mmap on a server running
a proprietary video server application (which is a binary compiled on FBSD
4.11 afaik). I don't have access to the source code for the server app
unfortunately (but I do have some access to the developers). I'm pretty sure
that with mmap enabled in the server, it tries to mmap all files smaller
than 50MB (most are 20-50MB).

The errors look like this:

g_vfs_done():ggate0[READ(offset=-1009882480640, length=65536)]error = 5
vnode_pager_getpages: I/O read error
vm_fault: pager read error, pid 1527 (mcvidserv)


This could certainly be a problem in the proprietary server, but I thought
I'd ask here too. This is on a recent 6-CURRENT system.

/Daniel Eriksson