82 	/* This blocks if we are low on resources */  in extAlloc()
105 		 * extent if we can allocate the blocks immediately  in extAlloc()
116 	/* allocate the disk blocks for the extent.  initially, extBalloc()  in extAlloc()
117 	 * will try to allocate disk blocks for the requested size (xlen).  in extAlloc()
118 	 * if this fails (xlen contiguous free blocks not available), it'll  in extAlloc()
119 	 * try to allocate a smaller number of blocks (producing a smaller  in extAlloc()
120 	 * extent), with this smaller number of blocks consisting of the  in extAlloc()
121 	 * requested number of blocks rounded down to the next smaller  in extAlloc()
123 	 * and retry the allocation until the number of blocks to allocate  in extAlloc()
124 	 * is smaller than the number of blocks per page.  in extAlloc()
132 	/* Allocate blocks to quota. */  in extAlloc()
153 	 * free the newly allocated blocks and return the error.  in extAlloc()
280  * FUNCTION:	allocate disk blocks to form an extent.
282  *		initially, we will try to allocate disk blocks for the
284  *		contiguous free blocks not available), we'll try to allocate
285  *		a smaller number of blocks (producing a smaller extent), with
286  *		this smaller number of blocks consisting of the requested
287  *		number of blocks rounded down to the next smaller power of 2
289  *		retry the allocation until the number of blocks to allocate
290  *		is smaller than the number of blocks per page.
297  *		   exit, this value is set to the number of blocks actually
318 	/* get the number of blocks to initially attempt to allocate.  in extBalloc()
319 	 * we'll first try the number of blocks requested unless this  in extBalloc()
321 	 * blocks in the map. in that case, we'll start off with the  in extBalloc()
335 	/* try to allocate blocks */  in extBalloc()
374  * FUNCTION:	round down a specified number of blocks to the next