svn commit: r367368 - head/sys/fs/tmpfs

[Mateusz Guzik]

Author: mjg
Date: Thu Nov  5 11:24:45 2020
New Revision: 367368
URL: https://svnweb.freebsd.org/changeset/base/367368

Log:
  tmpfs: reorder struct tmpfs_node to shrink it by 8 bytes
  
  The reduction (232 -> 224 bytes) allows UMA to fit one more item (17 -> 18)
  per slab as reported in vm.uma.TMPFS_node.keg.ipers.

Modified:
  head/sys/fs/tmpfs/tmpfs.h

Modified: head/sys/fs/tmpfs/tmpfs.h
==============================================================================
--- head/sys/fs/tmpfs/tmpfs.h	Thu Nov  5 11:19:31 2020	(r367367)
+++ head/sys/fs/tmpfs/tmpfs.h	Thu Nov  5 11:24:45 2020	(r367368)
@@ -156,8 +156,10 @@ struct tmpfs_node {
 	 * when the node is removed from list and unlocked.
 	 */
 	LIST_ENTRY(tmpfs_node)	tn_entries;	/* (m) */
-	bool			tn_attached;	/* (m) */
 
+	/* Node identifier. */
+	ino_t			tn_id;		/* (c) */
+
 	/*
 	 * The node's type.  Any of 'VBLK', 'VCHR', 'VDIR', 'VFIFO',
 	 * 'VLNK', 'VREG' and 'VSOCK' is allowed.  The usage of vnode
@@ -166,8 +168,10 @@ struct tmpfs_node {
 	 */
 	enum vtype		tn_type;	/* (c) */
 
-	/* Node identifier. */
-	ino_t			tn_id;		/* (c) */
+	/*
+	 * See the top comment. Reordered here to fill LP64 hole.
+	 */
+	bool			tn_attached;	/* (m) */
 
 	/*
 	 * Node's internal status.  This is used by several file system