linux-kernel - Re: Can we move device drivers into user-space?

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Message-ID: <CAG4AFWbfrTtq2OCrkrXfF-VV1+80oUE1Nfaxg5US3hNX3AiQ6A@mail.gmail.com>
Date:	Thu, 23 Feb 2012 16:01:56 -0500
From:	Jidong Xiao <jidong.xiao@...il.com>
To:	david@...g.hm
Cc:	Cong Wang <xiyou.wangcong@...il.com>,
	Kernel development list <linux-kernel@...r.kernel.org>
Subject: Re: Can we move device drivers into user-space?

On Thu, Feb 23, 2012 at 3:48 PM,  <david@...g.hm> wrote:
> On Thu, 23 Feb 2012, Jidong Xiao wrote:
>
>>>
>>> At least UIO drivers are already in Linux kernel, see drivers/uio/.
>>>
>>
>> Oh, so does it make sense to move existing device drivers into user
>> space? For example, move most of the stuff located under drivers/usb
>> into user-space?
>
>
> Why would you want to? What advantage are you looking to gain from all the
> effort?
>
Since device drivers are a significant source of bugs in OS. Moving
them to user space can reduce the impact of these bugs. Otherwise, why
UIO, or drivers/uio, is accepted by mainstream Linux kernel.

-Jidong
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