From: Jens Axboe <axboe@suse.de>
Date: Tue, 23 May 2006 09:23:49 +0000 (+0200)
Subject: [PATCH] blk: fix gendisk->in_flight accounting during barrier sequence
X-Git-Tag: v2.6.17-rc5~17
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fd0ff8aa1d95a896b3627bc62d42d6d002ac0bc3;p=pandora-kernel.git

[PATCH] blk: fix gendisk->in_flight accounting during barrier sequence

While executing barrrier sequence, the bar_rq which carries actual
write was accounted as normal IO on completion, while it wasn't on
queueing.  This caused gendisk->in_flight to be decremented by 1 after
each barrier thus messed up statistics.

This patch makes bar_rq not accounted as normal IO.  As the containing
barrier request as a whole is accounted, part of it shouldn't be.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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