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staging: hv: Increased storvsc ringbuffer and max_io_requests

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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>
This commit is contained in:
Hank Janssen 2010-08-05 19:30:31 +00:00 committed by Greg Kroah-Hartman
parent e5fa721d1c
commit 15dd1c9f53
1 changed files with 2 additions and 2 deletions
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4
drivers/staging/hv/storvsc_api.h
View file

@ -28,10 +28,10 @@
#include "vmbus_api.h" #include "vmbus_api.h"
/* Defines */ /* 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 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 * In Hyper-V, each port/path/target maps to 1 scsi host adapter. In