From: Christoph Hellwig <hch@infradead.org>
Date: Thu, 20 Feb 2014 22:21:01 +0000 (-0800)
Subject: [SCSI] add support for per-host cmd pools
X-Git-Tag: v3.15-rc1~136^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=89d9a567952baec13e26ada3e438f1b642d66b6e;p=pandora-kernel.git

[SCSI] add support for per-host cmd pools

This allows drivers to specify the size of their per-command private
data in the host template and then get extra memory allocated for
each command instead of needing another allocation in ->queuecommand.

With the current SCSI code that already does multiple allocations for
each command this probably doesn't make a big performance impact, but
it allows to clean up the drivers, and prepare them for using the
blk-mq infrastructure where the common allocation will make a difference.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
---

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