From mboxrd@z Thu Jan  1 00:00:00 1970
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From: majianpeng <majianpeng@gmail.com>
Date: Thu, 10 Jan 2013 04:36:19 -0700
Subject: [PATCH] Add a check avoid segfault.
Message-ID: <201301101936131638895@gmail.com>
Reply-To: majianpeng <majianpeng@gmail.com>
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To: Jens Axboe <JAxboe@fusionio.com>
Cc: fio <fio@vger.kernel.org>
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