| Message ID | 20220322194443.678433-1-tyreld@linux.ibm.com |
|---|---|
| State | New |
| Headers | show |
| Series | ibmvscsis: increase INITIAL_SRP_LIMIT to 1024 | expand |
Tyrel, > 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. Applied to 5.18/scsi-staging, thanks!
On Tue, 22 Mar 2022 12:44:43 -0700, Tyrel Datwyler wrote: > 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. > > [...] Applied to 5.18/scsi-fixes, thanks! [1/1] ibmvscsis: increase INITIAL_SRP_LIMIT to 1024 https://git.kernel.org/mkp/scsi/c/0bade8e53279
diff --git a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c index 61f06f6885a5..89b9fbce7488 100644 --- a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c +++ b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c @@ -36,7 +36,7 @@ #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
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. Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com> --- drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)