Chandra Seetharaman 970f3f47e7 [SCSI] scsi_dh: Make rdac hardware handler's activate() async ...

Batch up MODE_SELECT in rdac device handler.

LSI RDAC storage has the capability of handling mode selects for
multiple luns in a same command. Make use of that ability to send
as few MODE SELECTs as possible to the storage controller as possible.

This patch creates a work queue and queues up activate requests
when a MODE SELECT is sent down the wire. When that MODE SELECT
completes, it compiles queued up activate requests for multiple
luns into a single MODE SELECT.

This reduces the time to do failover/failback of large number of LUNS.

Signed-off-by: Babu Moger <babu.moger@lsi.com>
Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

2009-12-04 12:00:47 -06:00

..

Kconfig

[SCSI] scsi_dh: add generic SPC-3 alua handler

2008-07-26 15:14:52 -04:00

Makefile

[SCSI] scsi_dh: add generic SPC-3 alua handler

2008-07-26 15:14:52 -04:00

scsi_dh_alua.c

[SCSI] scsi_dh: Change the scsidh_activate interface to be asynchronous

2009-12-04 12:00:46 -06:00

scsi_dh_emc.c

[SCSI] scsi_dh: Change the scsidh_activate interface to be asynchronous

2009-12-04 12:00:46 -06:00

scsi_dh_hp_sw.c

[SCSI] scsi_dh: Change the scsidh_activate interface to be asynchronous

2009-12-04 12:00:46 -06:00

scsi_dh_rdac.c

[SCSI] scsi_dh: Make rdac hardware handler's activate() async

2009-12-04 12:00:47 -06:00

scsi_dh.c

[SCSI] scsi_dh: Change the scsidh_activate interface to be asynchronous

2009-12-04 12:00:46 -06:00