Module Name: src
Committed By: riastradh
Date: Sat Mar 18 22:02:11 UTC 2017
Modified Files:
src/sys/kern: vfs_cache.c
Log Message:
Fix lock order statement. Annotate with references to examples.
To generate a diff of this commit:
cvs rdiff -u -r1.117 -r1.118 src/sys/kern/vfs_cache.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/vfs_cache.c
diff -u src/sys/kern/vfs_cache.c:1.117 src/sys/kern/vfs_cache.c:1.118
--- src/sys/kern/vfs_cache.c:1.117 Sat Mar 18 21:03:28 2017
+++ src/sys/kern/vfs_cache.c Sat Mar 18 22:02:11 2017
@@ -1,4 +1,4 @@
-/* $NetBSD: vfs_cache.c,v 1.117 2017/03/18 21:03:28 riastradh Exp $ */
+/* $NetBSD: vfs_cache.c,v 1.118 2017/03/18 22:02:11 riastradh Exp $ */
/*-
* Copyright (c) 2008 The NetBSD Foundation, Inc.
@@ -58,7 +58,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: vfs_cache.c,v 1.117 2017/03/18 21:03:28 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: vfs_cache.c,v 1.118 2017/03/18 22:02:11 riastradh Exp $");
#ifdef _KERNEL_OPT
#include "opt_ddb.h"
@@ -110,7 +110,12 @@ __KERNEL_RCSID(0, "$NetBSD: vfs_cache.c,
* N struct namecache::nc_lock Per-entry lock.
* V struct vnode::v_interlock Vnode interlock.
*
- * Lock order: C -> N -> L -> V
+ * Lock order: L -> C -> N -> V
+ *
+ * Examples:
+ * . L->C: cache_reclaim
+ * . C->N->V: cache_lookup
+ * . L->N->V: cache_purge1, cache_revlookup
*
* All use serialized by namecache_lock:
*
