80 	/* This blocks if we are low on resources */  in extAlloc()
103 		 * extent if we can allocate the blocks immediately  in extAlloc()
114 	/* allocate the disk blocks for the extent.  initially, extBalloc()  in extAlloc()
115 	 * will try to allocate disk blocks for the requested size (xlen).  in extAlloc()
116 	 * if this fails (xlen contiguous free blocks not available), it'll  in extAlloc()
117 	 * try to allocate a smaller number of blocks (producing a smaller  in extAlloc()
118 	 * extent), with this smaller number of blocks consisting of the  in extAlloc()
119 	 * requested number of blocks rounded down to the next smaller  in extAlloc()
121 	 * and retry the allocation until the number of blocks to allocate  in extAlloc()
122 	 * is smaller than the number of blocks per page.  in extAlloc()
130 	/* Allocate blocks to quota. */  in extAlloc()
151 	 * free the newly allocated blocks and return the error.  in extAlloc()
210 	/* This blocks if we are low on resources */  in extRealloc()
219 	 * number of blocks.  in extRealloc()
235 	/* try to allocated the request number of blocks for the  in extRealloc()
238 	 * try to allocate a new set of blocks large enough for the  in extRealloc()
246 	/* Allocat blocks to quota. */  in extRealloc()
308 		/* perform the insert.  if it fails, free the blocks  in extRealloc()
467  * FUNCTION:	allocate disk blocks to form an extent.
469  *		initially, we will try to allocate disk blocks for the
471  *		contiguous free blocks not available), we'll try to allocate
472  *		a smaller number of blocks (producing a smaller extent), with
473  *		this smaller number of blocks consisting of the requested
474  *		number of blocks rounded down to the next smaller power of 2
476  *		retry the allocation until the number of blocks to allocate
477  *		is smaller than the number of blocks per page.
484  *		   exit, this value is set to the number of blocks actually
505 	/* get the number of blocks to initially attempt to allocate.  in extBalloc()
506 	 * we'll first try the number of blocks requested unless this  in extBalloc()
508 	 * blocks in the map. in that case, we'll start off with the  in extBalloc()
517 	/* try to allocate blocks */  in extBalloc()
562  *		to a new set of blocks.  If moving the extent, we initially
563  *		will try to allocate disk blocks for the requested size
564  *		(newnblks).  if this fails (new contiguous free blocks not
566  *		blocks (producing a smaller extent), with this smaller
567  *		number of blocks consisting of the requested number of
568  *		blocks rounded down to the next smaller power of 2
570  *		retry the allocation until the number of blocks to allocate
571  *		is smaller than the number of blocks per page.
576  *	nblks	 - number of blocks within the extents current allocation.
578  *		   the new desired extent size (number of blocks).  on
580  *		   new size (new number of blocks).
604 	 * try to move the extent to a new set of blocks.  in extBrealloc()
614  * FUNCTION:	round down a specified number of blocks to the next