From: Tejun Heo <htejun@gmail.com>
Date: Fri, 6 Jan 2006 08:51:03 +0000 (+0100)
Subject: [BLOCK] reimplement handling of barrier request
X-Git-Tag: v2.6.16-rc1~936^2^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=797e7dbbee0a91fa1349192f18ad5c454997d876;p=pandora-kernel.git

[BLOCK] reimplement handling of barrier request

Reimplement handling of barrier requests.

* Flexible handling to deal with various capabilities of
  target devices.
* Retry support for falling back.
* Tagged queues which don't support ordered tag can do ordered.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jens Axboe <axboe@suse.de>
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