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| author | Joseph Handzik <joseph.t.handzik@beardog.cce.hp.com> | 2011-08-08 11:40:15 +0200 |
|---|---|---|
| committer | Jens Axboe <jaxboe@fusionio.com> | 2011-08-08 11:40:15 +0200 |
| commit | 13049537007dee73a76f0a30fcbc24d02c6fa9e4 (patch) | |
| tree | 2bc62c056f42ef8792c3912fef5ce5ca318df993 /Documentation/blockdev | |
| parent | 322a8b034003c0d46d39af85bf24fee27b902f48 (diff) | |
| download | lwn-13049537007dee73a76f0a30fcbc24d02c6fa9e4.tar.gz lwn-13049537007dee73a76f0a30fcbc24d02c6fa9e4.zip | |
cciss: Adds simple mode functionality
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>
Diffstat (limited to 'Documentation/blockdev')
| -rw-r--r-- | Documentation/blockdev/cciss.txt | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/blockdev/cciss.txt b/Documentation/blockdev/cciss.txt index c00c6a5ab21f..71464e09ec18 100644 --- a/Documentation/blockdev/cciss.txt +++ b/Documentation/blockdev/cciss.txt @@ -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 ------------------------------------------ |