From: Robert Elliott <elliott@hp.com>
Date: Fri, 23 Jan 2015 22:43:41 +0000 (-0600)
Subject: hpsa: optimize cmd_alloc function by remembering last allocation
X-Git-Tag: fixes-v4.0-rc1~143^2~26
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=33811026a0a4208dd5725183d37fc92d5e88b0a2;p=pandora-kernel.git

hpsa: optimize cmd_alloc function by remembering last allocation

Empirically, this improves performance slightly (~2% max IOPS) by
allowing cmd_alloc to remember where it left off searching for
free commands between calls instead of always starting its search
at command 0.

Reviewed-by: Scott Teel <scott.teel@pmcs.com>
Signed-off-by: Robert Elliott <elliott@hp.com>
Signed-off-by: Don Brace <don.brace@pmcs.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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