options VFS_AIO vs. qemu vs. shell accounts

[Oliver Fromme]

Hi,

sys/conf/NOTES contains this comment in RELENG_6 (for as
long as the AIO option exists, which is more than 7 years):

   # Use real implementations of the aio_* system calls.  There are numerous
   # stability and security issues in the current aio code that make it
   # unsuitable for inclusion on machines with untrusted local users.
   options         VFS_AIO

Does that warning about stability and security issues still
apply on RELENG_6?  If it does, is somebody working on a
fix for that?

The problem is that recent versions of qemu seem to require
AIO (for IDE DMA).  Given the above comment, it seems to be
impossible to use qemu on machines with shell accounts.

Best regards
   Oliver

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