svn commit: r363931 - head/sys/kern

[Mateusz Guzik]

Author: mjg
Date: Wed Aug  5 19:34:13 2020
New Revision: 363931
URL: https://svnweb.freebsd.org/changeset/base/363931

Log:
  vfs hash: annotate the lock with __exclusive_cache_line
  
  Note the code does not scale in the current form.

Modified:
  head/sys/kern/vfs_hash.c

Modified: head/sys/kern/vfs_hash.c
==============================================================================
--- head/sys/kern/vfs_hash.c	Wed Aug  5 19:15:59 2020	(r363930)
+++ head/sys/kern/vfs_hash.c	Wed Aug  5 19:34:13 2020	(r363931)
@@ -43,7 +43,7 @@ static MALLOC_DEFINE(M_VFS_HASH, "vfs_hash", "VFS hash
 static LIST_HEAD(vfs_hash_head, vnode)	*vfs_hash_tbl;
 static LIST_HEAD(,vnode)		vfs_hash_side;
 static u_long				vfs_hash_mask;
-static struct rwlock			vfs_hash_lock;
+static struct rwlock __exclusive_cache_line vfs_hash_lock;
 
 static void
 vfs_hashinit(void *dummy __unused)