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Commit d58129c9 authored by Raghava Aditya Renukunta's avatar Raghava Aditya Renukunta Committed by Martin K. Petersen
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scsi: aacraid: Added 32 and 64 queue depth for arc natives 



The qd for ARC Native disks is calculated by dividing the max IO 1024
by the number of disks or 256 which ever is lower. This causes poor
disk IO performance.

The fix is set the qd based on the type of disk (SAS - 64 and SATA -
32).

Signed-off-by: default avatarRaghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
Reviewed-by: default avatarDavid Carroll <david.carroll@microsemi.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 8105d39d

drivers/scsi/aacraid/aacraid.h

+1 −0
Original line number Diff line number Diff line
@@ -415,6 +415,7 @@ struct aac_ciss_identify_pd { 
 * These macros convert from physical channels to virtual channels

 */

#define CONTAINER_CHANNEL		(0)

#define NATIVE_CHANNEL			(1)

#define CONTAINER_TO_CHANNEL(cont)	(CONTAINER_CHANNEL)

#define CONTAINER_TO_ID(cont)		(cont)

#define CONTAINER_TO_LUN(cont)		(0)

drivers/scsi/aacraid/linit.c

+11 −0
Original line number Diff line number Diff line
@@ -466,6 +466,17 @@ static int aac_slave_configure(struct scsi_device *sdev) 
			++num_lsu;



		depth = (host->can_queue - num_one) / num_lsu;



		if (sdev_channel(sdev) != NATIVE_CHANNEL)

			goto common_config;



		/*

		 * Check if SATA drive

		 */

		if (strncmp(sdev->vendor, "ATA", 3) == 0)

			depth = 32;

		else

			depth = 64;

	}



common_config: