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scsi: ibmvscsis: Increase INITIAL_SRP_LIMIT to 1024

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[ Upstream commit 0bade8e53279157c7cc9dd95d573b7e82223d78a ]

The adapter request_limit is hardcoded to be INITIAL_SRP_LIMIT which is
currently an arbitrary value of 800. Increase this value to 1024 which
better matches the characteristics of the typical IBMi Initiator that
supports 32 LUNs and a queue depth of 32.

This change also has the secondary benefit of being a power of two as
required by the kfifo API. Since, Commit ab9bb6318b09 ("Partially revert
"kfifo: fix kfifo_alloc() and kfifo_init()"") the size of IU pool for each
target has been rounded down to 512 when attempting to kfifo_init() those
pools with the current request_limit size of 800.

Link: https://lore.kernel.org/r/20220322194443.678433-1-tyreld@linux.ibm.com
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Tyrel Datwyler 2022-03-22 12:44:43 -07:00 committed by Greg Kroah-Hartman
parent e3e0e067d5
commit e1771560f9
1 changed files with 1 additions and 1 deletions
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drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
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@ -44,7 +44,7 @@
#define IBMVSCSIS_VERSION "v0.2"
#define INITIAL_SRP_LIMIT 800
#define INITIAL_SRP_LIMIT 1024
#define DEFAULT_MAX_SECTORS 256
#define MAX_TXU 1024 * 1024