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From: Alan Cox <alc@FreeBSD.org>
Date: Sat, 20 Aug 2016 19:12:52 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-user@freebsd.org
Subject: svn commit: r304539 - user/alc/PQ_LAUNDRY/sys/vm
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Author: alc
Date: Sat Aug 20 19:12:52 2016
New Revision: 304539
URL: https://svnweb.freebsd.org/changeset/base/304539

Log:
  Simplify vm_pageout_laundry_worker() a bit.  We don't need "shortfall" to
  be valid across iterations of the main loop.

Modified:
  user/alc/PQ_LAUNDRY/sys/vm/vm_pageout.c

Modified: user/alc/PQ_LAUNDRY/sys/vm/vm_pageout.c
==============================================================================
--- user/alc/PQ_LAUNDRY/sys/vm/vm_pageout.c	Sat Aug 20 18:52:03 2016	(r304538)
+++ user/alc/PQ_LAUNDRY/sys/vm/vm_pageout.c	Sat Aug 20 19:12:52 2016	(r304539)
@@ -1106,7 +1106,7 @@ vm_pageout_laundry_worker(void *arg)
 
 	cycle = 0;
 	last_launder = 0;
-	shortfall = prev_shortfall = 0;
+	prev_shortfall = 0;
 	target = 0;
 
 	/*
@@ -1146,7 +1146,7 @@ vm_pageout_laundry_worker(void *arg)
 			 * pages.  Otherwise keep laundering.
 			 */
 			if (vm_laundry_target() <= 0 || cycle == 0) {
-				shortfall = prev_shortfall = target = 0;
+				prev_shortfall = target = 0;
 				last_launder = wakeups;
 			} else {
 				launder = target / cycle--;
@@ -1215,7 +1215,7 @@ vm_pageout_laundry_worker(void *arg)
 dolaundry:
 		if (launder > 0)
 			target -= min(vm_pageout_launder(domain, launder,
-			    shortfall > 0), target);
+			    prev_shortfall > 0), target);
 
 		tsleep(&vm_cnt.v_laundry_count, PVM, "laundr",
 		    hz / VM_LAUNDER_INTERVAL);