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cciss: Adds simple mode functionality

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Signed-off-by: Joseph Handzik <joseph.t.handzik@beardog.cce.hp.com>
Acked-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Joseph Handzik
2011-08-08 11:40:15 +02:00
committed by Jens Axboe
parent 322a8b0340
commit 1304953700
3 changed files with 56 additions and 11 deletions
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10
Documentation/blockdev/cciss.txt
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@@ -78,6 +78,16 @@ The device naming scheme is:
/dev/cciss/c1d1p2 Controller 1, disk 1, partition 2
/dev/cciss/c1d1p3 Controller 1, disk 1, partition 3
CCISS simple mode support
-------------------------
The "cciss_simple_mode=1" boot parameter may be used to prevent the driver
from putting the controller into "performant" mode. The difference is that
with simple mode, each command completion requires an interrupt, while with
"performant mode" (the default, and ordinarily better performing) it is
possible to have multiple command completions indicated by a single
interrupt.
SCSI tape drive and medium changer support
------------------------------------------