From e00c54c36ac2024c3a8a37432e2e2698ff849594 Mon Sep 17 00:00:00 2001
From: Jens Axboe <jens.axboe@oracle.com>
Date: Sun, 4 Oct 2009 20:36:19 +0200
Subject: [PATCH] cfq-iosched: don't delay async queue if it hasn't dispatched
 at all

We cannot delay for the first dispatch of the async queue if it
hasn't dispatched at all, since that could present a local user
DoS attack vector using an app that just did slow timed sync reads
while filling memory.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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