path: root/Documentation/blockdev
diff options
authorJoseph Handzik <>2011-08-08 11:40:15 +0200
committerJens Axboe <>2011-08-08 11:40:15 +0200
commit13049537007dee73a76f0a30fcbc24d02c6fa9e4 (patch)
tree2bc62c056f42ef8792c3912fef5ce5ca318df993 /Documentation/blockdev
parent322a8b034003c0d46d39af85bf24fee27b902f48 (diff)
cciss: Adds simple mode functionality
Signed-off-by: Joseph Handzik <> Acked-by: Stephen M. Cameron <> Signed-off-by: Jens Axboe <>
Diffstat (limited to 'Documentation/blockdev')
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
SCSI tape drive and medium changer support