102  *	Get a new page of memory.
111 		(void)fprintf(stderr, "mpool_new: page allocation overflow.\n");  in mpool_new()
118 	 * Get a BKT from the cache.  Assign a new page number, attach  in mpool_new()
135 	return (bp->page);  in mpool_new()
139 mpool_delete(MPOOL *mp, void *page)  in mpool_delete()  argument
144 	bp = (BKT *)((char *)page - sizeof(BKT));  in mpool_delete()
149 		    "mpool_delete: page %d not pinned\n", bp->pgno);  in mpool_delete()
166  *	Get a page.
181 	/* Check for a page that is cached. */  in mpool_get()
186 			    "mpool_get: page %d already pinned\n", bp->pgno);  in mpool_get()
191 		 * Move the page to the head of the hash chain and the tail  in mpool_get()
200 		/* Return a pinned page. */  in mpool_get()
202 		return (bp->page);  in mpool_get()
205 	/* Get a page from the cache. */  in mpool_get()
211 	if ((nr = pread(mp->fd, bp->page, mp->pagesize, off)) != mp->pagesize) {  in mpool_get()
221 			 * new page.  in mpool_get()
223 			memset(bp->page, 0, mp->pagesize);  in mpool_get()
237 	/* Set the page number, pin the page. */  in mpool_get()
244 	 * Add the page to the head of the hash chain and the tail  in mpool_get()
253 		(mp->pgin)(mp->pgcookie, bp->pgno, bp->page);  in mpool_get()
255 	return (bp->page);  in mpool_get()
260  *	Return a page.
263 mpool_put(MPOOL *mp, void *page, u_int flags)  in mpool_put()  argument
270 	bp = (BKT *)((char *)page - sizeof(BKT));  in mpool_put()
274 		    "mpool_put: page %d not pinned\n", bp->pgno);  in mpool_put()
325  *	Get a page from the cache (or create one).
333 	/* If under the max cached, always create a new page. */  in mpool_bkt()
358 				spage = bp->page;  in mpool_bkt()
360 				bp->page = spage;  in mpool_bkt()
373 	bp->page = (char *)bp + sizeof(BKT);  in mpool_bkt()
381  *	Write a page to disk.
394 		(mp->pgout)(mp->pgcookie, bp->pgno, bp->page);  in mpool_write()
397 	if (pwrite(mp->fd, bp->page, mp->pagesize, off) != mp->pagesize)  in mpool_write()
401 	 * Re-run through the input filter since this page may soon be  in mpool_write()
407 		(mp->pgin)(mp->pgcookie, bp->pgno, bp->page);  in mpool_write()
415  *	Lookup a page in the cache.
452 	    "page size %lu, cacheing %lu pages of %lu page max cache\n",  in mpool_stat()
454 	(void)fprintf(stderr, "%lu page puts, %lu page gets, %lu page new\n",  in mpool_stat()
456 	(void)fprintf(stderr, "%lu page allocs, %lu page flushes\n",  in mpool_stat()
463 	(void)fprintf(stderr, "%lu page reads, %lu page writes\n",  in mpool_stat()