Messages in this thread | | | Date | Mon, 27 Mar 2006 10:42:56 +0200 | From | Gerd Hoffmann <> | Subject | Re: [RFC PATCH 35/35] Add Xen virtual block device driver. |
| |
Hi,
>> +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 ...
cheers,
Gerd
-- Gerd 'just married' Hoffmann <kraxel@suse.de> I'm the hacker formerly known as Gerd Knorr. http://www.suse.de/~kraxel/just-married.jpeg - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |