Re: [PATCH v3 3/4] block: loop: use kthread_work

[Christoph Hellwig]

On Thu, May 07, 2015 at 06:32:03PM +0800, Ming Lei wrote:
> > I can't really parse this, what's the specific advantage here?
> 
> Patch 4's commit log provides the test data.
> 
> >From the data, it is observed that one thread is enough to get
> similar throughput with previous one which submits IO from
> work concurrently.
> 
> Single thread can decrease context switch a lots, also one thread is
> often used to submit AIO in reality.

But we still need to support the non-AIO case.  For one due to
bisectablity, and second even with AIO support we'll still have people
using it.
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