[PATCH 1/1] Reduce AACRAID hardware queue size

From: Andy Whitcroft
Date: Tue Jun 23 2009 - 07:25:46 EST

From: Mathias Urlichs <matthias@xxxxxxxxxx>

BugLink: http://bugzilla.kernel.org/show_bug.cgi?id=11120
BugLink: http://bugs.launchpad.net/bugs/249964

Reduce the hardware queue size for the AACRAID controller. This controloler
suffers adapter aborts and scsi resets under high load otherwise:

aacraid: Host adapter abort request (0,0,2,0)
aacraid: Host adapter abort request (0,0,3,0)
aacraid: Host adapter reset request. SCSI hang ?
aacraid: Host adapter abort request (0,0,0,0)

Signed-Off-By: Mathias Urlichs <matthias@xxxxxxxxxx>
Signed-off-by: Andy Whitcroft <apw@xxxxxxxxxxxxx>
drivers/scsi/aacraid/aacraid.h | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/scsi/aacraid/aacraid.h b/drivers/scsi/aacraid/aacraid.h
index cdbdec9..0d5d036 100644
--- a/drivers/scsi/aacraid/aacraid.h
+++ b/drivers/scsi/aacraid/aacraid.h
@@ -24,7 +24,7 @@
#define AAC_MAX_LUN (8)

-#define AAC_MAX_32BIT_SGBCOUNT ((unsigned short)256)
+#define AAC_MAX_32BIT_SGBCOUNT ((unsigned short)127)

* These macros convert from physical channels to virtual channels

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