Author: adrian
Date: Tue Jan 7 01:17:27 2014
New Revision: 260384
URL: http://svnweb.freebsd.org/changeset/base/260384
Log:
Add a compile-time control over the size of KN_HASHSIZE.
This is needed for applications that use a lot of non-filedescriptor
knotes.
MFC after: 1 week
Sponsored by: Netflix, Inc.
Modified:
head/sys/conf/options
head/sys/kern/kern_event.c
Modified: head/sys/conf/options
==============================================================================
--- head/sys/conf/options Tue Jan 7 00:38:22 2014 (r260383)
+++ head/sys/conf/options Tue Jan 7 01:17:27 2014 (r260384)
@@ -128,6 +128,7 @@ GEOM_VOL opt_geom.h
GEOM_ZERO opt_geom.h
KDTRACE_HOOKS opt_global.h
KDTRACE_FRAME opt_kdtrace.h
+KN_HASHSIZE opt_kqueue.h
KSTACK_MAX_PAGES
KSTACK_PAGES
KTRACE
Modified: head/sys/kern/kern_event.c
==============================================================================
--- head/sys/kern/kern_event.c Tue Jan 7 00:38:22 2014 (r260383)
+++ head/sys/kern/kern_event.c Tue Jan 7 01:17:27 2014 (r260384)
@@ -30,6 +30,7 @@
__FBSDID("$FreeBSD$");
#include "opt_ktrace.h"
+#include "opt_kqueue.h"
#include <sys/param.h>
#include <sys/systm.h>
@@ -250,7 +251,10 @@ SYSCTL_UINT(_kern, OID_AUTO, kq_calloutm
#define KNL_ASSERT_UNLOCKED(knl) do {} while (0)
#endif /* INVARIANTS */
+#ifndef KN_HASHSIZE
#define KN_HASHSIZE 64 /* XXX should be
tunable */
+#endif
+
#define KN_HASH(val, mask) (((val) ^ (val >> 8)) & (mask))
static int
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