Module Name: src
Committed By: pooka
Date: Sat Jan 22 13:13:46 UTC 2011
Modified Files:
src/sys/rump/librump/rumpkern: vm.c
Log Message:
Add a comment explaning why uvm_reclaim_hook is not currently
necessary for rump.
XXX: strictly speaking, the zfs implementation does not work
correctly since it just wakes up a thread instead of performing
the scan in the context of the pagedaemon
To generate a diff of this commit:
cvs rdiff -u -r1.107 -r1.108 src/sys/rump/librump/rumpkern/vm.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/rump/librump/rumpkern/vm.c
diff -u src/sys/rump/librump/rumpkern/vm.c:1.107 src/sys/rump/librump/rumpkern/vm.c:1.108
--- src/sys/rump/librump/rumpkern/vm.c:1.107 Tue Jan 18 22:21:23 2011
+++ src/sys/rump/librump/rumpkern/vm.c Sat Jan 22 13:13:46 2011
@@ -1,4 +1,4 @@
-/* $NetBSD: vm.c,v 1.107 2011/01/18 22:21:23 haad Exp $ */
+/* $NetBSD: vm.c,v 1.108 2011/01/22 13:13:46 pooka Exp $ */
/*
* Copyright (c) 2007-2010 Antti Kantee. All Rights Reserved.
@@ -41,7 +41,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: vm.c,v 1.107 2011/01/18 22:21:23 haad Exp $");
+__KERNEL_RCSID(0, "$NetBSD: vm.c,v 1.108 2011/01/22 13:13:46 pooka Exp $");
#include <sys/param.h>
#include <sys/atomic.h>
@@ -342,19 +342,20 @@
/* nada */
}
+/*
+ * The uvm reclaim hook is not currently necessary because it is
+ * used only by ZFS and implements exactly the same functionality
+ * as the kva reclaim hook which we already run in the pagedaemon
+ * (rump vm does not have a concept of uvm_map(), so we cannot
+ * reclaim kva it when a mapping operation fails due to insufficient
+ * available kva).
+ */
void
uvm_reclaim_hook_add(struct uvm_reclaim_hook *hook_entry)
{
- /* nada */
-}
-
-void
-uvm_reclaim_hook_del(struct uvm_reclaim_hook *hook_entry)
-{
-
- /* nada */
}
+__strong_alias(uvm_reclaim_hook_del,uvm_reclaim_hook_add);
/* where's your schmonz now? */
#define PUNLIMIT(a) \
