Lines Matching defs:fastscan

79 pgcnt_t		fastscan = 0;
139  *     for new pageout parameters, fastscan, slowscan, and handspreadpages.
143  *     set new values for handspreadpages, fastscan and slowscan.
155  *     The new value to use for fastscan and handspreadpages.
241 		init_fscan = fastscan;
314 	 * The clock scan rate varies between fastscan and slowscan
323 	 * per sec for every processor, fastscan is set to be the smaller
327 	 * Setting fastscan to be 1/2 of memory allows pageout to scan
329 	 * accessed within 1 sec (assuming, handspreadpages == fastscan)
334 	 * Smaller values of fastscan result in scanning fewer pages
337 	 * values of fastscan result in scanning a lot more pages which
345 	 * (the upper bound for fastscan) based on the average number
367 	 * In addition to setting fastscan and slowscan, pageout is
378 	 * linearly between slowscan and fastscan.
381 	 * at slowscan to ~4% at fastscan instead of varying between
382 	 * ~1% at slowscan and ~10% at fastscan.
384 	 * The values chosen for the various VM parameters (fastscan,
405 	 * it more difficult to determine the values for fastscan, slowscan
423 		fastscan = MIN(looppages / loopfraction, maxfastscan);
425 		fastscan = init_fscan;
426 	if (fastscan > looppages / loopfraction)
427 		fastscan = looppages / loopfraction;
434 		slowscan = MIN(fastscan / 10, maxslowscan);
437 	if (slowscan > fastscan / 2)
438 		slowscan = fastscan / 2;
448 	 * to be "fastscan" results in the front hand being a few secs
450 	 * at fastscan rates.  This distance can be further reduced, if
461 		handspreadpages = fastscan;
522  * slowscan with lotsfree and fastscan when out of memory.
563 			desscan = fastscan / RATETOSCHEDPAGING;
573 			faststmp = fastscan * (lotsfree - vavail);