linux-kernel - [PATCH 7/7] zram: mark the disk as non-rotating media

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Message-ID: <20110126172743.GI8446@linux.vnet.ibm.com>
Date:	Wed, 26 Jan 2011 11:27:44 -0600
From:	Robert Jennings <rcj@...ux.vnet.ibm.com>
To:	Nitin Gupta <ngupta@...are.org>
Cc:	Greg Kroah-Hartman <gregkh@...e.de>,
	Robert Jennings <rcj@...ux.vnet.ibm.com>,
	Pekka Enberg <penberg@...helsinki.fi>,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: [PATCH 7/7] zram: mark the disk as non-rotating media

Adding QUEUE_FLAG_NONROT for the in the request_queue flags.  When used
as a swap device, scan_swap_map will avoid the extra work of optimizing
for rotating media.

Signed-off-by: Robert Jennings <rcj@...ux.vnet.ibm.com>
---
 drivers/staging/zram/zram_drv.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/staging/zram/zram_drv.c b/drivers/staging/zram/zram_drv.c
index d5e0275..450c618 100644
--- a/drivers/staging/zram/zram_drv.c
+++ b/drivers/staging/zram/zram_drv.c
@@ -593,6 +593,7 @@ static int create_device(struct zram *zram, int device_id)
 		goto out;
 	}
 
+	zram->queue->queue_flags ^= QUEUE_FLAG_NONROT;
 	blk_queue_make_request(zram->queue, zram_make_request);
 	zram->queue->queuedata = zram;
 
-- 
1.6.0.2

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