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    SubjectRe: [RFC PATCH 35/35] Add Xen virtual block device driver.

    >> +static struct xlbd_type_info xlbd_ide_type = {
    >> +static struct xlbd_type_info xlbd_scsi_type = {
    >> +static struct xlbd_type_info xlbd_vbd_type = {

    > 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.

    It's useful sometimes. Debian/sarge for example doesn't work with xvd
    block devices. At least not out-of-the-box, it needs some manual
    tweaks. Probably it also is handy when moving real machines into an
    virtual environment. I don't think it should be dropped.

    Most modern udev-based distros work just fine with xvd though.

    > 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.

    Print a big fat warning? And also change the example config files in
    the xen source tree to use xvda not hda to advertize them more than we
    do right now. I think lots of users don't even know about the xvd
    devices ...



    Gerd 'just married' Hoffmann <>
    I'm the hacker formerly known as Gerd Knorr.
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