From: Matthew Wilcox <matthew.r.wilcox@intel.com>
Date: Thu, 27 Mar 2014 20:40:34 +0000 (-0400)
Subject: mpt2sas: Add free smids to the head, not tail of list
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~13^2~43
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=049b3e81d79b1957c0be231d66a98b5715b347e4;p=pandora-kernel.git

mpt2sas: Add free smids to the head, not tail of list

Reusing a smid quickly means it's still cache-hot.  This yields a small
but noticable performance improvement in a well-known database benchmark.
This improvement is already present in the mpt3sas driver.

Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Reviewed-by: Nicholas Bellinger <nab@linux-iscsi.org>
Reviewed-by: Praveen Krishnamoorthy <Praveen.krishnamoorthy@lsi.com>
Acked-by: Sreekanth Reddy <Sreekanth.reddy@lsi.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---

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