Re: [Xen-devel] Re: [PATCH] libxl: virtio-blk-pci support for FV domain

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Sun, 2011-05-08 at 12:26 +0100, Takeshi HASEGAWA wrote:
> My patch threats virtio block devices with same manner with xvd, sd, and hd.
> Though, I need to discuss with xen developpers whether the vbd number
> assignment is reasonable or not.
> 
> I guess blktap and blkback will never handle virto block device, so assigning
> (reserving) the whole range of 2 << 28 for virtio block vbd may be more 
> better.

I think eating into that space would be better than exposing yet another
Linux specific major number in our interfaces.

> Actually virtio is not Xen's VBD, so vbd number is not mandatory to work.
> However, I believe this approach makes virtio block manageable
> in same way as xvd and others.
> 
> I am looking forward for xen developpers' opinions.
> 
> 
> Thanks,
> Takeshi
> 
> 2011/05/08 14:25 "Wei Liu" <liuw@xxxxxxxxx>:
> > On Sun, May 8, 2011 at 12:56 PM, Wei Liu <liuw@xxxxxxxxx> wrote:
> >> Thanks, I just started working on VirtIO block support yesterday.
> >>
> >> I was trying to add support to parse_disk_config() so that we can
> >> specify "-if" option in the config file.
> >>
> >> I'm wondering which approach is better -- configure through
> >> device_virtdisk_matches() or parse_disk_config() .
> >>
> >> Any suggestions?
> >
> > It seems that Takeshi's approach is better.
> >
> > I should follow libxl's conventions.
> >
> > --
> > Best regards
> > Wei Liu
> > Twitter: @iliuw
> > Site: http://liuw.name
> 
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