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authorStephen M. Cameron <scameron@beardog.cce.hp.com>2011-01-06 14:48:29 -0600
committerJames Bottomley <James.Bottomley@suse.de>2011-01-24 11:30:43 -0600
commit02ec19c82e87e3748d326ca5e15e7ddb18c73476 (patch)
treebec075bdfbe16a1ca5cc4df9ada03ef9a14a01b5 /Documentation/scsi
parent6eaf46fdc719991a3ccda1e14b274e9adb515978 (diff)
downloadlinux-02ec19c82e87e3748d326ca5e15e7ddb18c73476.tar.gz
[SCSI] hpsa: allow driver to put controller in either simple or performant mode
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'Documentation/scsi')
-rw-r--r--Documentation/scsi/hpsa.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/scsi/hpsa.txt b/Documentation/scsi/hpsa.txt
index dca658362cb..b14e6ee00a9 100644
--- a/Documentation/scsi/hpsa.txt
+++ b/Documentation/scsi/hpsa.txt
@@ -28,6 +28,12 @@ boot parameter "hpsa_allow_any=1" is specified, however these are not tested
nor supported by HP with this driver. For older Smart Arrays, the cciss
driver should still be used.
+The "hpsa_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.
+
HPSA specific entries in /sys
-----------------------------