> one potential problem here:  we shouldn't ever put the pagedaemon to
> sleep waiting for memory which is created by the pagedaemon.  this
> wasn't a problem before since the buffer cache memory was made available
> for reuse in a different buffer by brelse(), ie. usually when i/o completed.

Under which circumstances could this actually happen?  The page daemon
doesn't rely on the buffer cache directly. I guess there's a remote
possibility to trigger a buffer cache allocation when pageing out pages
backed by a file that's mapped in shared mode.

-pk