Module Name:	src
Committed By:	mycroft
Date:		Tue Oct 27 23:48:23 UTC 1998

Modified Files:
	src/sys/kern: vfs_bio.c
Log Message:
Several things:
* Change the usage of B_DONE so that it is only set when a buffer is in sync
with the data on disk.
* If a buffer is being waited for, don't put it on the age queue.
* Make sure to clear B_DONE when pages are stolen from a buffer.
* Make sure to clear B_CACHE after each use.
* If we find a buffer for the block we want with valid data, but it is too
small, panic.  (This isn't supposed to happen.)
Fixes potential file corruption problems with clustering.