staging: hv: Increased storvsc ringbuffer and max_io_requests

Increased storvsc ringbuffer and max_io_requests. This now more
closely mimics the numbers on Hyper-V. And will allow more IO requests
to take place for the SCSI driver.

Max_IO is set to double from what it was before, Hyper-V allows it and
we have had appliance builder requests to see if it was a problem to
increase the number.

Ringbuffer size for storvsc is now increased because I have seen A few buffer
problems on extremely busy systems. They were Set pretty low before.
And since max_io_requests is increased I Really needed to increase the buffer
as well.

Signed-off-by:Hank Janssen <hjanssen@microsoft.com>
Signed-off-by:Haiyang Zhang <haiyangz@microsoft.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/hv/storvsc_api.h b/drivers/staging/hv/storvsc_api.h
index 0063bde9a4b23ac22bbaad19d1912518a855c008..8505a1c5f9ee6bab72259539fa0d1c845fbba1c9 100644 (file)
--- a/drivers/staging/hv/storvsc_api.h
+++ b/drivers/staging/hv/storvsc_api.h
@@ -28,10 +28,10 @@
 #include "vmbus_api.h"
 
 /* Defines */
-#define STORVSC_RING_BUFFER_SIZE                       (10*PAGE_SIZE)
+#define STORVSC_RING_BUFFER_SIZE                       (20*PAGE_SIZE)
 #define BLKVSC_RING_BUFFER_SIZE                                (20*PAGE_SIZE)
 
-#define STORVSC_MAX_IO_REQUESTS                                64
+#define STORVSC_MAX_IO_REQUESTS                                128
 
 /*
  * In Hyper-V, each port/path/target maps to 1 scsi host adapter.  In