linux-kernel - [PATCH 3/3] staging: lustre: lnet: optimize memory foot print for lnet

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Message-Id: <1465512347-11650-4-git-send-email-jsimmons@infradead.org>
Date:	Thu,  9 Jun 2016 18:45:47 -0400
From:	James Simmons <jsimmons@...radead.org>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	devel@...verdev.osuosl.org,
	Andreas Dilger <andreas.dilger@...el.com>,
	Oleg Drokin <oleg.drokin@...el.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Lustre Development List <lustre-devel@...ts.lustre.org>,
	Bruno Faccini <bruno.faccini@...el.com>,
	James Simmons <jsimmons@...radead.org>
Subject: [PATCH 3/3] staging: lustre: lnet: optimize memory foot print for lnet_libmd

From: Bruno Faccini <bruno.faccini@...el.com>

The lnet_libmd struct fields have been re-ordered to optimize its
memory foot-print.

Signed-off-by: Bruno Faccini <bruno.faccini@...el.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4430
Reviewed-on: http://review.whamcloud.com/18586
Reviewed-by: Andreas Dilger <andreas.dilger@...el.com>
Reviewed-by: Doug Oucharek <doug.s.oucharek@...el.com>
Reviewed-by: Oleg Drokin <oleg.drokin@...el.com>
Signed-off-by: James Simmons <jsimmons@...radead.org>
---
 .../staging/lustre/include/linux/lnet/lib-types.h  |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/staging/lustre/include/linux/lnet/lib-types.h b/drivers/staging/lustre/include/linux/lnet/lib-types.h
index 7967b01..79a4ecf 100644
--- a/drivers/staging/lustre/include/linux/lnet/lib-types.h
+++ b/drivers/staging/lustre/include/linux/lnet/lib-types.h
@@ -151,9 +151,9 @@ typedef struct lnet_libmd {
 	int			 md_refcount;
 	unsigned int		 md_options;
 	unsigned int		 md_flags;
+	unsigned int		 md_niov;	/* # frags at end of struct */
 	void			*md_user_ptr;
 	lnet_eq_t		*md_eq;
-	unsigned int		 md_niov;	/* # frags */
 	union {
 		struct kvec	iov[LNET_MAX_IOV];
 		lnet_kiov_t	kiov[LNET_MAX_IOV];
-- 
1.7.1