[Xen-devel] [PATCH 4/4] xen-blkfront: increase the default number of indirect segments

[Roger Pau Monne <roger.pau@xxxxxxxxxx>]

When using certain storage devices (like RAID) having a bigger number
of segments per request provides better performance.

Signed-off-by: Roger Pau Monnà <roger.pau@xxxxxxxxxx>
Reported-by: Steven Haigh <netwiz@xxxxxxxxx>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
---
 drivers/block/xen-blkfront.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 2e1ee34..4e3ab34 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -94,9 +94,9 @@ static const struct block_device_operations xlvbd_block_fops;
  * by the backend driver.
  */
 
-static unsigned int xen_blkif_max_segments = 32;
+static unsigned int xen_blkif_max_segments = 64;
 module_param_named(max, xen_blkif_max_segments, int, S_IRUGO);
-MODULE_PARM_DESC(max, "Maximum amount of segments in indirect requests 
(default is 32)");
+MODULE_PARM_DESC(max, "Maximum amount of segments in indirect requests 
(default is 64)");
 
 #define BLK_RING_SIZE __CONST_RING_SIZE(blkif, PAGE_SIZE)
 
-- 
1.7.7.5 (Apple Git-26)


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