svn commit: r353884 - stable/12/sys/vm
Mark Johnston
markj at FreeBSD.org
Tue Oct 22 14:10:32 UTC 2019
Author: markj
Date: Tue Oct 22 14:10:31 2019
New Revision: 353884
URL: https://svnweb.freebsd.org/changeset/base/353884
Log:
MFC r353734:
Further constrain the use of per-CPU caches for free pages.
PR: 241048
Modified:
stable/12/sys/vm/vm_page.c
Directory Properties:
stable/12/ (props changed)
Modified: stable/12/sys/vm/vm_page.c
==============================================================================
--- stable/12/sys/vm/vm_page.c Tue Oct 22 14:06:42 2019 (r353883)
+++ stable/12/sys/vm/vm_page.c Tue Oct 22 14:10:31 2019 (r353884)
@@ -199,10 +199,12 @@ vm_page_init_cache_zones(void *dummy __unused)
vmd = VM_DOMAIN(domain);
/*
- * Don't allow the page caches to take up more than .25% of
- * memory.
+ * Don't allow the page caches to take up more than .1875% of
+ * memory. A UMA bucket contains at most 256 free pages, and we
+ * have two buckets per CPU per free pool.
*/
- if (vmd->vmd_page_count / 400 < 256 * mp_ncpus * VM_NFREEPOOL)
+ if (vmd->vmd_page_count / 600 < 2 * 256 * mp_ncpus *
+ VM_NFREEPOOL)
continue;
for (pool = 0; pool < VM_NFREEPOOL; pool++) {
pgcache = &vmd->vmd_pgcache[pool];
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