svn commit: r349018 - stable/12/sys/vm

[Mark Johnston]

Author: markj
Date: Thu Jun 13 16:34:55 2019
New Revision: 349018
URL: https://svnweb.freebsd.org/changeset/base/349018

Log:
  MFC r348747:
  Add sysctls for uma_kmem_{limit,total}.

Modified:
  stable/12/sys/vm/uma_core.c
Directory Properties:
  stable/12/   (props changed)

Modified: stable/12/sys/vm/uma_core.c
==============================================================================
--- stable/12/sys/vm/uma_core.c	Thu Jun 13 16:34:25 2019	(r349017)
+++ stable/12/sys/vm/uma_core.c	Thu Jun 13 16:34:55 2019	(r349018)
@@ -144,9 +144,16 @@ static int boot_pages;
 
 static struct sx uma_drain_lock;
 
-/* kmem soft limit. */
+/*
+ * kmem soft limit, initialized by uma_set_limit().  Ensure that early
+ * allocations don't trigger a wakeup of the reclaim thread.
+ */
 static unsigned long uma_kmem_limit = LONG_MAX;
+SYSCTL_ULONG(_vm, OID_AUTO, uma_kmem_limit, CTLFLAG_RD, &uma_kmem_limit, 0,
+    "UMA kernel memory soft limit");
 static unsigned long uma_kmem_total;
+SYSCTL_ULONG(_vm, OID_AUTO, uma_kmem_total, CTLFLAG_RD, &uma_kmem_total, 0,
+    "UMA kernel memory usage");
 
 /* Is the VM done starting up? */
 static enum { BOOT_COLD = 0, BOOT_STRAPPED, BOOT_PAGEALLOC, BOOT_BUCKETS,