linux-kernel - Re: [RFC PATCH] vhost-blk: An in-kernel accelerator for virtio-blk

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Message-ID: <4E44349D.9030809@profitbricks.com>
Date:	Thu, 11 Aug 2011 21:59:25 +0200
From:	Dongsu Park <dongsu.park@...fitbricks.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
CC:	Liu Yuan <namei.unix@...il.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Avi Kivity <avi@...hat.com>, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH] vhost-blk: An in-kernel accelerator for virtio-blk

Hi,

On 07/28/2011 05:22 PM, Michael S. Tsirkin wrote:
> On Thu, Jul 28, 2011 at 10:29:05PM +0800, Liu Yuan wrote:
>> +static struct miscdevice vhost_blk_misc = {
>> +	234,
>
> Don't get a major unless you really must.

the minor number 234 conflicts with that of BTRFS, in kernel 3.0 at least.
Therefore you cannot load vhost_blk.ko if btrfs.ko was already loaded.
Probably that number should be something else, with which you don't have 
conflict with any minor number in include/linux/miscdevice.h.

-- 
Dongsu Park
Email: dongsu.park@...fitbricks.com
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