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xen-devel
[Xen-devel] Re: [RFC PATCH 35/35] Add Xen virtual block device driver.
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To: |
Anthony Liguori <aliguori@xxxxxxxxxx> |
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Subject: |
[Xen-devel] Re: [RFC PATCH 35/35] Add Xen virtual block device driver. |
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From: |
Christoph Hellwig <hch@xxxxxxxxxxxxx> |
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Date: |
Wed, 22 Mar 2006 16:54:44 +0000 |
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Cc: |
Chris Wright <chrisw@xxxxxxxxxxxx>, virtualization@xxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Ian Pratt <ian.pratt@xxxxxxxxxxxxx> |
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Thu, 23 Mar 2006 17:44:04 +0000 |
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On Wed, Mar 22, 2006 at 10:39:25AM -0600, Anthony Liguori wrote:
> This is another thing that has always put me off. The virtual block
> device driver has the ability to masquerade as other types of block
> devices. It actually claims to be an IDE or SCSI device allocating the
> appropriate major/minor numbers.
>
> This seems to be pretty evil and creating interesting failure conditions
> for users who load IDE or SCSI modules. I've seen it trip up a number
> of people in the past. I think we should only ever use the major number
> that was actually allocated to us.
Exactly. We vetoed crap like that in the ibm vio drivers already so
it was removed before merging those drivers.
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