Author: eadler
Date: Fri Jun 1 04:42:52 2012
New Revision: 236380
URL: http://svn.freebsd.org/changeset/base/236380
Log:
Add sysctl to query amount of swap space free
PR: kern/166780
Submitted by: Radim Kolar <h...@sendmail.cz>
Approved by: cperciva
MFC after: 1 week
Modified:
head/sys/vm/swap_pager.c
Modified: head/sys/vm/swap_pager.c
==============================================================================
--- head/sys/vm/swap_pager.c Fri Jun 1 04:34:49 2012 (r236379)
+++ head/sys/vm/swap_pager.c Fri Jun 1 04:42:52 2012 (r236380)
@@ -2692,3 +2692,18 @@ swaponvp(struct thread *td, struct vnode
NODEV);
return (0);
}
+
+static int
+sysctl_vm_swap_free(SYSCTL_HANDLER_ARGS) {
+ int swap_free, used;
+ int total;
+
+ swap_pager_status(&total, &used);
+
+ swap_free = (total - used) * PAGE_SIZE;
+ return SYSCTL_OUT(req, &swap_free, sizeof(swap_free));
+}
+
+SYSCTL_OID(_vm, OID_AUTO, swap_free, CTLTYPE_INT|CTLFLAG_RD|CTLFLAG_MPSAFE,
+ NULL, 0, sysctl_vm_swap_free, "Q",
+ "Blocks of free swap storage.");
_______________________________________________
svn-src-head@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/svn-src-head
To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
