K 10
svn:author
V 5
tegge
K 8
svn:date
V 27
2006-03-08T23:57:07.000000Z
K 7
svn:log
V 607
MFC: For low memory situations, non-VMIO buffers didnt't release pages back
     to the system when brelse() was called with B_RELBUF set on the buffer.
     This could be a problem when the system was low on memory, had many
     buffers on QUEUE_EMPTYKVA and started to traverse directories.  For
     each getnewbuf(), pages were allocated from the system, driving the
     free reserve downwards. For each brelse(), the system put the buffer
     on QUEUE_CLEAN, with B_INVAL set.

     This commit changes the semantics of B_RELBUF to also free pages from
     non-VMIO buffers.

Approved by:	re (mux)

END