From: Tejun Heo  <htejun@gmail.com>
Date: Thu, 16 Jun 2005 10:57:31 +0000 (+0200)
Subject:  This patch fixes q->unplug_thresh condition check in
X-Git-Tag: v2.6.12~6^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c374f127e4ff17a318b9ae95a5bf65f370c2d0b1;p=pandora-kernel.git

 This patch fixes q->unplug_thresh condition check in
__elv_add_request().  rq.count[READ] + rq.count[WRITE] can increase
more than one if another thread has allocated a request after the
current request is allocated or in_flight could have changed resulting
in larger-than-one change of nrq, thus breaking the threshold
mechanism.

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