svn commit: r356611 - head/sys/vm

[Gleb Smirnoff]

Author: glebius
Date: Fri Jan 10 19:32:08 2020
New Revision: 356611
URL: https://svnweb.freebsd.org/changeset/base/356611

Log:
  Always multiple vm.pgcache_zone_max to number of CPUs, and rename it
  respectively.  The tunable controls how big is the size of per-cpu
  vm page cache.  Previously the value was split for all CPUs in system,
  so configuring same value on machines with different count of CPUs
  yielded in different cache size available to a particular CPU.
  
  Reviewed by:	markj
  Obtained from:	Netflix

Modified:
  head/sys/vm/vm_page.c

Modified: head/sys/vm/vm_page.c
==============================================================================
--- head/sys/vm/vm_page.c	Fri Jan 10 18:53:14 2020	(r356610)
+++ head/sys/vm/vm_page.c	Fri Jan 10 19:32:08 2020	(r356611)
@@ -228,7 +228,8 @@ vm_page_init_cache_zones(void *dummy __unused)
 	int cache, domain, maxcache, pool;
 
 	maxcache = 0;
-	TUNABLE_INT_FETCH("vm.pgcache_zone_max", &maxcache);
+	TUNABLE_INT_FETCH("vm.pgcache_zone_max_pcpu", &maxcache);
+	maxcache *= mp_ncpus;
 	for (domain = 0; domain < vm_ndomains; domain++) {
 		vmd = VM_DOMAIN(domain);
 		for (pool = 0; pool < VM_NFREEPOOL; pool++) {