Module Name: src
Committed By: msaitoh
Date: Wed Jan 16 06:45:25 UTC 2013
Modified Files:
src/sys/kern: kern_rndq.c
Log Message:
Set resource limit. The rnd_process_events() function is called every tick
and process the sample queue. Without limitation, if a lot of rnd_add_*()
are called, all kernel memory may be eaten up.
To generate a diff of this commit:
cvs rdiff -u -r1.6 -r1.7 src/sys/kern/kern_rndq.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/kern/kern_rndq.c
diff -u src/sys/kern/kern_rndq.c:1.6 src/sys/kern/kern_rndq.c:1.7
--- src/sys/kern/kern_rndq.c:1.6 Sat Oct 27 01:29:02 2012
+++ src/sys/kern/kern_rndq.c Wed Jan 16 06:45:24 2013
@@ -1,4 +1,4 @@
-/* $NetBSD: kern_rndq.c,v 1.6 2012/10/27 01:29:02 tls Exp $ */
+/* $NetBSD: kern_rndq.c,v 1.7 2013/01/16 06:45:24 msaitoh Exp $ */
/*-
* Copyright (c) 1997-2011 The NetBSD Foundation, Inc.
@@ -32,7 +32,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_rndq.c,v 1.6 2012/10/27 01:29:02 tls Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_rndq.c,v 1.7 2013/01/16 06:45:24 msaitoh Exp $");
#include <sys/param.h>
#include <sys/ioctl.h>
@@ -405,7 +405,17 @@ rnd_init(void)
rnd_mempc = pool_cache_init(sizeof(rnd_sample_t), 0, 0, 0,
"rndsample", NULL, IPL_VM,
NULL, NULL, NULL);
- /* Mix *something*, *anything* into the pool to help it get started.
+
+ /*
+ * Set resource limit. The rnd_process_events() function
+ * is called every tick and process the sample queue.
+ * Without limitation, if a lot of rnd_add_*() are called,
+ * all kernel memory may be eaten up.
+ */
+ pool_cache_sethardlimit(rnd_mempc, RND_POOLBITS, NULL, 0);
+
+ /*
+ * Mix *something*, *anything* into the pool to help it get started.
* However, it's not safe for rnd_counter() to call microtime() yet,
* so on some platforms we might just end up with zeros anyway.
* XXX more things to add would be nice.
