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Date: Thu, 7 May 2015 00:17:07 -0700
From: Christoph Hellwig <hch@infradead.org>
To: Ming Lei <ming.lei@canonical.com>
Cc: linux-kernel@vger.kernel.org, Dave Kleikamp <dave.kleikamp@oracle.com>,
        Jens Axboe <axboe@kernel.dk>, Zach Brown <zab@zabbo.net>,
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        Andrew Morton <akpm@linux-foundation.org>,
        Alexander Viro <viro@zeniv.linux.org.uk>, Tejun Heo <tj@kernel.org>
Subject: Re: [PATCH v3 3/4] block: loop: use kthread_work
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On Thu, May 07, 2015 at 01:08:25AM +0800, Ming Lei wrote:
> The following patch will use dio/aio to submit IO to backing file,
> then it isn't good to schedule IO concurrently from work, so
> use kthread_work.

I can't really parse this, what's the specific advantage here?