From f24aa01f9d0b03a6650deffd7bd31cb68bfd0172 Mon Sep 17 00:00:00 2001
From: Mateusz Guzik <mjg@FreeBSD.org>
Date: Thu, 5 Nov 2020 11:24:45 +0000
Subject: [PATCH] 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.
---
 sys/fs/tmpfs/tmpfs.h | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/sys/fs/tmpfs/tmpfs.h b/sys/fs/tmpfs/tmpfs.h
index 8c6e51e62fe5..beded9cd5455 100644
--- a/sys/fs/tmpfs/tmpfs.h
+++ b/sys/fs/tmpfs/tmpfs.h
@@ -156,7 +156,9 @@ 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',
@@ -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