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[SCSI] hpsa: allow driver to put controller in either simple or performant mode

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Signed-off-by: Stephen M. Cameron <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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Stephen M. Cameron 2011-01-06 14:48:29 -06:00 • committed by James Bottomley
commit 02ec19c82e
2 changed files with 13 additions and 0 deletions
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6
Documentation/scsi/hpsa.txt
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@ -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
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