linux-kernel - [PATCH v2 03/16] block: add queue attributes to manage dpmg and swapin requests

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Date:	Thu, 3 May 2012 19:53:02 +0530
From:	Venkatraman S <svenkatr@...com>
To:	<linux-mmc@...r.kernel.org>, <cjb@...top.org>,
	<linux-mm@...ck.org>, <linux-fsdevel@...r.kernel.org>,
	<linux-omap@...r.kernel.org>
CC:	<linux-kernel@...r.kernel.org>, <arnd.bergmann@...aro.org>,
	<alex.lemberg@...disk.com>, <ilan.smith@...disk.com>,
	<lporzio@...ron.com>, <rmk+kernel@....linux.org.uk>,
	Venkatraman S <svenkatr@...com>
Subject: [PATCH v2 03/16] block: add queue attributes to manage dpmg and swapin requests

Add block queue properties to identify and manage demand paging
and swapin requests differently.

Signed-off-by: Ilan Smith <ilan.smith@...disk.com>
Signed-off-by: Alex Lemberg <alex.lemberg@...disk.com>
Signed-off-by: Venkatraman S <svenkatr@...com>
---
 include/linux/blkdev.h |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 2aa2466..e9187d4 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -420,6 +420,8 @@ struct request_queue {
 #define QUEUE_FLAG_ADD_RANDOM  16	/* Contributes to random pool */
 #define QUEUE_FLAG_SECDISCARD  17	/* supports SECDISCARD */
 #define QUEUE_FLAG_SAME_FORCE  18	/* force complete on same CPU */
+#define QUEUE_FLAG_EXP_DMPG    19	/* Expedite Demand paging requests */
+#define QUEUE_FLAG_EXP_SWAPIN  20	/* Expedit page swapping */
 
 #define QUEUE_FLAG_DEFAULT	((1 << QUEUE_FLAG_IO_STAT) |		\
 				 (1 << QUEUE_FLAG_STACKABLE)	|	\
@@ -502,6 +504,12 @@ static inline void queue_flag_clear(unsigned int flag, struct request_queue *q)
 #define blk_queue_secdiscard(q)	(blk_queue_discard(q) && \
 	test_bit(QUEUE_FLAG_SECDISCARD, &(q)->queue_flags))
 
+#define blk_queue_exp_dmpg(q) \
+	test_bit(QUEUE_FLAG_EXP_DMPG, &(q)->queue_flags)
+
+#define blk_queue_exp_swapin(q) \
+	test_bit(QUEUE_FLAG_EXP_SWAPIN, &(q)->queue_flags)
+
 #define blk_noretry_request(rq) \
 	((rq)->cmd_flags & (REQ_FAILFAST_DEV|REQ_FAILFAST_TRANSPORT| \
 			     REQ_FAILFAST_DRIVER))
-- 
1.7.10.rc2

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