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From: Conrad Meyer <cem@FreeBSD.org>
Date: Fri, 14 Aug 2020 18:48:48 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r364237 - head/sys/vm
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Author: cem
Date: Fri Aug 14 18:48:48 2020
New Revision: 364237
URL: https://svnweb.freebsd.org/changeset/base/364237

Log:
  vm_pageout: Correct threshold calculation on single-CPU systems
  
  Reported by:	Michael Butler
  X-MFC-With:	r364129

Modified:
  head/sys/vm/vm_pageout.c

Modified: head/sys/vm/vm_pageout.c
==============================================================================
--- head/sys/vm/vm_pageout.c	Fri Aug 14 16:44:10 2020	(r364236)
+++ head/sys/vm/vm_pageout.c	Fri Aug 14 18:48:48 2020	(r364237)
@@ -2216,7 +2216,7 @@ get_pageout_threads_per_domain(void)
 	 * Semi-arbitrarily constrain pagedaemon threads to less than half the
 	 * total number of threads in the system as an insane upper limit.
 	 */
-	half_cpus_per_dom = (mp_ncpus / vm_ndomains) / 2;
+	half_cpus_per_dom = howmany(mp_ncpus / vm_ndomains, 2);
 
 	if (pageout_threads_per_domain < 1) {
 		printf("Invalid tuneable vm.pageout_threads_per_domain value: "