svn commit: r254558 - head/sys/kern
Peter Holm
pho at FreeBSD.org
Tue Aug 20 11:06:57 UTC 2013
Author: pho
Date: Tue Aug 20 11:06:56 2013
New Revision: 254558
URL: http://svnweb.freebsd.org/changeset/base/254558
Log:
Added sysctl to turn off calls to vmem_check().
Sponsored by: EMC / Isilon storage division
Discussed with: jeff
Modified:
head/sys/kern/subr_vmem.c
Modified: head/sys/kern/subr_vmem.c
==============================================================================
--- head/sys/kern/subr_vmem.c Tue Aug 20 07:48:20 2013 (r254557)
+++ head/sys/kern/subr_vmem.c Tue Aug 20 11:06:56 2013 (r254558)
@@ -54,6 +54,7 @@ __FBSDID("$FreeBSD$");
#include <sys/mutex.h>
#include <sys/smp.h>
#include <sys/condvar.h>
+#include <sys/sysctl.h>
#include <sys/taskqueue.h>
#include <sys/vmem.h>
@@ -167,6 +168,9 @@ struct vmem_btag {
#define BT_END(bt) ((bt)->bt_start + (bt)->bt_size - 1)
#if defined(DIAGNOSTIC)
+static int enable_vmem_check = 1;
+SYSCTL_INT(_debug, OID_AUTO, vmem_check, CTLFLAG_RW,
+ &enable_vmem_check, 0, "Enable vmem check");
static void vmem_check(vmem_t *);
#endif
@@ -720,9 +724,11 @@ vmem_periodic(void *unused, int pending)
LIST_FOREACH(vm, &vmem_list, vm_alllist) {
#ifdef DIAGNOSTIC
/* Convenient time to verify vmem state. */
- VMEM_LOCK(vm);
- vmem_check(vm);
- VMEM_UNLOCK(vm);
+ if (enable_vmem_check == 1) {
+ VMEM_LOCK(vm);
+ vmem_check(vm);
+ VMEM_UNLOCK(vm);
+ }
#endif
desired = 1 << flsl(vm->vm_nbusytag);
desired = MIN(MAX(desired, VMEM_HASHSIZE_MIN),
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