--- src/sys/kern/vfs_bio.c	2006/04/30 20:23:24	1.70
+++ src/sys/kern/vfs_bio.c	2006/05/03 20:44:49	1.71
@@ -700,7 +700,8 @@ bwrite(struct buf * bp)
 	vfs_busy_pages(bp->b_vp, bp);
 
 	/*
-	 * Normal bwrites pipeline writes
+	 * Normal bwrites pipeline writes.  NOTE: b_bufsize is only
+	 * valid for vnode-backed buffers.
 	 */
 	bp->b_runningbufspace = bp->b_bufsize;
 	runningbufspace += bp->b_runningbufspace;
@@ -1021,10 +1022,7 @@ brelse(struct buf * bp)
 	 *
 	 * Normally we can do this whether a buffer is B_DELWRI or not.  If
 	 * the buffer is an NFS buffer, it is tracking piecemeal writes or
-	 * the commit state and we cannot afford to lose the buffer. If the
-	 * buffer has a background write in progress, we need to keep it
-	 * around to prevent it from being reconstituted and starting a second
-	 * background write.
+	 * the commit state and we cannot afford to lose the buffer.
 	 */
 	if ((bp->b_flags & B_VMIO)
 	    && !(bp->b_vp->v_tag == VT_NFS &&