Author: kib
Date: Tue Jan 25 10:20:36 2011
New Revision: 217818
URL: http://svn.freebsd.org/changeset/base/217818
Log:
MFC r217564:
Make the length of the LDT a loader tunable, machdep.max_ldt_segment,
and export it with read-only sysctl. Remove unused defines.
MFC r217604:
Use CTLFLAG_RDTUN for read-only sysctl that exports tunable.
Modified:
stable/8/sys/amd64/amd64/sys_machdep.c
Directory Properties:
stable/8/sys/ (props changed)
stable/8/sys/amd64/include/xen/ (props changed)
stable/8/sys/cddl/contrib/opensolaris/ (props changed)
stable/8/sys/contrib/dev/acpica/ (props changed)
stable/8/sys/contrib/pf/ (props changed)
Modified: stable/8/sys/amd64/amd64/sys_machdep.c
==============================================================================
--- stable/8/sys/amd64/amd64/sys_machdep.c Tue Jan 25 10:17:37 2011
(r217817)
+++ stable/8/sys/amd64/amd64/sys_machdep.c Tue Jan 25 10:20:36 2011
(r217818)
@@ -35,6 +35,7 @@ __FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
+#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
@@ -58,9 +59,24 @@ __FBSDID("$FreeBSD$");
#include <security/audit/audit.h>
+#define MAX_LD 8192
+
int max_ldt_segment = 1024;
-#define LD_PER_PAGE 512
-#define NULL_LDT_BASE ((caddr_t)NULL)
+SYSCTL_INT(_machdep, OID_AUTO, max_ldt_segment, CTLFLAG_RDTUN,
+ &max_ldt_segment, 0,
+ "Maximum number of allowed LDT segments in the single address space");
+
+static void
+max_ldt_segment_init(void *arg __unused)
+{
+
+ TUNABLE_INT_FETCH("machdep.max_ldt_segment", &max_ldt_segment);
+ if (max_ldt_segment <= 0)
+ max_ldt_segment = 1;
+ if (max_ldt_segment > MAX_LD)
+ max_ldt_segment = MAX_LD;
+}
+SYSINIT(maxldt, SI_SUB_VM_CONF, SI_ORDER_ANY, max_ldt_segment_init, NULL);
#ifdef notyet
#ifdef SMP
_______________________________________________
svn-src-all@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/svn-src-all
To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
